Yeah theirs a transmission shop in Texas that's the same way.... I would love for these guys to build me a motor and the Texas guys build me a transmission.....
I'm not a machinist or (car) mechanic. Just a electrician. But i really enjoy watching your video's. The skill involved doing the things you guy's do is really great to see. Greetings from the Netherlands
"Just an electrician" he says! A cousin of mine was electrician, and the problem solving skills he had when it came to figuring out a scheme for the multitude of jobs he did was amazing. As a telephone/comm network installer, I've done the same kind of thing. None of us are "just".
@@harrywalker968 was just watching a vid from india/Pakistan of them casting a huge involute gear, like multiple feet thick. Those guys are impressive for making do with less, but it's kind of scary the lack of any saftey equipment (open sandals in a metal shop, plus the child labor).
Do you guys get many 6.0 ford diesel heads come through the shop? Or did you in the past? They were kind of notorious for the head bolts stretching/heads warping/cracking (which lead to head gasket problems) . 6.0's are starting to get kind of old now, but there are still plenty of them on the road, was just wondering.
It's impressive that you check the heads to spec even though the manufacturer stated they were in spec. Thats an extra step you take to give you the confidence that the parts you give to customers are the best than can be. Really nice work!
They can print anything on a tag. If you don't want comebacks you better check EVERYTHING especially these days. Just the other day I had a set of new pistons come in for a job that 2 of the 6 were .005" oversized past the limit. While they physically would fit in the bores it would have seized as it was warming up and failed the engine.
@@bcbloc02 always amazing as to how for close tolerance parts, the manufacturers charge so much yet never seem to be anywhere near desired tolerance limits
You never do know whats behind the door until you open it up and have a good look. I was more surprised by the machining requirements on a new head. How many brand new vehicles out there are sold with an engine that could have been made to better tollarance. Keep up the great work guy's. David in the UK.
I admire and respect the that y'all don't settle for " good enough" and always go the extra time and effort to make things "as good as they possibly can be." Great content, keep up the good work!
I rarely do the work you guys do but I can honestly say that next time I do this work I will have new knowledge to use so my motor assembly will be even better than before.
You two are the most professional of engine re-manufacturers out there. If I lived in the states and needed an engine rebuild I certainly would send it to the cleaning guy and his kid!
You were small when you got me as a subscription holder. Glad to see you are doing well and growing. Great day today to you both and have a great day today.
You always seem to make these parts *better* than new, which is really cool. Also the noise of taking the vacuum tester of the head was a nice satisfying PWOP
These guys are the definition of do you want this done right or right now. Their knowledge and attention to detail is well worth the costs to get your part is done “right”.
I have been in this trade for seven years now post my apprenticeship. Watching your videos has inspired me. I look forward to being the owner of a machine shop. You and your Dad make an awesome team and the workmanship is top-notch.
Those cracks are SUPER common on 3406E and Acert series. Seems the firing deck expands a bunch. The deck is very thick and if it passes a leak check we were instructed by CAT to never worry about it. But I agree with your assessment to replace.
I like your way of thinking, customer first, they expect nothing more than the best and you guys deliver. If everyone did as you do, the world would be a much better place.
I noticed the same thing in 6-92 Detroit engines where they would crack between the valves and trash the head We'd get well over a million miles between teardowns on 6-71's and less than 250k on 6-92's Really enjoy the videos and your cleaning guy is top notch 😉👍
I’m a hobby car builder from an electrical background but I really enjoy these videos. The time you take to explain what and why you do stuff is just fantastic and I love the honesty in why you guys do things. All the best from Ireland 🇮🇪
Coming from a long line of machinists, it's nice to see manual machining done with care. Of course CNC has its place but there is no substitute for the art of machining something with analog tools.
We all get caught up by the crush of time! Being man enough to admit to it just proves that you live with your personal standards and aren’t afraid to correct yourself ratther then send out a poor product!!!! Proud to watch your vids!!!!😊
As long as his injection components and his piston clearances are good, that’s gonna run like a scalded dog. Good, quality machine work on an engine like that isn’t commonplace. Even though you’re really far away from me, I might be in touch for some work from you guys purely for the quality of work that you do. Plus it’d be cool to see my heads on RUclips lol
I really enjoy watching you apply your skills and experience in your craft. It's part of my job as a cnc tech to make the machines deliver precision to allow the machinists to produce the best quality aircraft engine parts on this planet. I will fly on any aircraft sporting our handy work dangling below the wings. You only have one reputation to live by and you are doing a good job at it.
Great video, guys so relaxing watching you guys do some machining. If I wasn't dumb I'd like to be a machinist. I'm dyslexic and have ADHD ADD all the fun stuff, lol. But I still like building engines. I wish I could tune an ECU through. Cheers from Canada 🍻
Question: up until a year ago i worked for a car dealership as a master tech (finally retired...YAY!), we were always told to use valve lapping compound on new valves/heads and to hand lap in all new valvetrains before installing the new heads.....I am now wondering, is this because possibly the runout on the new heads seen here? what are your thoughts?
Lapping valves is a pretty heavily debated topic, but at the MOST the only lapping that should ever be done IMO is with very fine grit (not what they sell at Autozone) and a very quick lap just to check the contact patch. No amount of valve lapping will correct an improperly cut valve seat. I think it's more of a situation of old habits die hard.
As someone who spent significant time in both worlds it's about time and money. Most mfgrs will have you swap valves, springs cam followers, etc into a new head. It would be rare for a dealership to have a valve grinder 9or someone with knowledge how to use it) and sending valves out to a machine shop would add multiple days to the repair. No tech wants a car torn down in their stall or a thousand engine parts laying around to get lost while waiting for valves to return from the shop. The valves are lapped simply to clean the face then visual inspected to see if they are reusable. With hardened seats lapping does nothing to enhance sealing. It's a throw back to the days of softer metals where you could enhance to seal by removing metal with lapping paste and lots of time.
Great video guys really enjoy watching. Been in the Automotive field going on 35 years including the manufacturing side. watching your videos makes me feel right at home. Keep up the great videos guys, be Blessed.
Nice 👍 ! I’ve had to learn over the years to pay attention to detail, several times. So don’t feel bad, it happens to all of us from time to time. At least you caught before any real work began. I hate investing time and labor into a piece only to find it was scrap from jump street and should have been caught up front. But still, with the work you did do to a brand new aftermarket cylinder head, I’m sure your customer had very little to complain about.
I might just have to bite the bullet and drive my stuff to you guys, I'm in awe that you take such measures to ensure the job is done right. Work like you all do is extremely hard to find nowadays and the extra expense would be worth it to me. I can't stand hearing the shop I use saying, "You're not building a space shuttle"
I love learning from people that know what they're talking about. I've got enough machining experience to know when people are BS-ing. You, sir, know what you're doing.
Would appreciate you relocating the shop to Central Texas as soon as possible......Would be happy to make you our sole source machine shop for all our machining work... Great work as always.... Now to go to our shop and weld out two seized and broken 6.7 injector hold-down bolts in a method much like your way of doing it.
Enjoy your videos. I've been burned by that old don't order parts until you know the whole situation rule as well. Difficult to resist trying to save the time.
As a retired 45 years Tool& Die Maker love process you guys go thru as I always told my apprentices learn the process so how are you regrinding your cutting tool using surface grinder or a specialized tool grinder?
Yep! Soon we will be installing an upgrade on the Serdi which allows constant spindle variation around a nominal speed, which helps reduce the chatter. Just haven't gotten it ordered yet!
Quality service right there. They could've just sold the new head without cutting the valve holes but they didn't. Never see companies that honest anymore. Any business that does something like this is worth the little extra money.
It's great to see your channel approach 500k subscribers. You and your Dad do a great job. It really doesn't take that much more time to be anal and shoot for the best results you can achieve. Machine shops are dying off and closing all over the country. So, I hope your channel and your workmanship is helping your business stay very busy.
Caterpillar heads crack between the intake valves. Cat spec is if it's not beyond the valve seats it's reusable. There is no coolant between the intakes seats, hence why they crack.
Where can I find the cylinder head spec sheets I see in your videos ? Having complete head information prior to performing a job is always a plus but as a "home machinist" not a shop I often do not have this critical information and have to search the internet for what often is found to be questionable information.
job well done 🎉, chapeau bas monsieur, 😊 , from the technical view you and your dad are master of art , so glad you put your knowledge and expertise to the world to see 😊🎉
I recently rebuilt a 366 bbc. Not even 10 seconds after start-up 3 wrist pins seized in the pistons. Have you ever come across something like this? The pistons and rods were done at a local machine shop. Those 3 bound up so hard the rod doesn't even move in the piston
This has me wanting to have my trick flow heads checked. I spent a lot of time and money having my block decked, bored and machined to perfection. Do I take trick flows word? Or send them off to be perfected as well?
What are your thoughts on cutting most of the way on the seat angle with lower speed (to preserve tool life) and do a "spring pass" at the end with higher speed?
As the owner of one of these engines, I can tell you that those cracks between the valves are common on the C12, and generally don't cause any real problems. But I do understand that if you're going to stand behind your work, you'll want to reassemble it without the cracks. When I overhauled my engine, I installed a head that had a couple of cracks like that. 250000 miles later, I haven't seen any problems because of it.
I've seen videos of people welding heads where there are cracks and then machine the heads for a rebuild. This doesn't sound like a good practice, but I would like to know your thoughts on welding defects and then machiningback down to size.
Out of curiosity, do original new cylinder heads have much scatter in valve depth or valve seat concentricity? You seem to have achieved a very consistent median value of recess and concentricity of the valve seats after reworking the aftermarket head.
That's why many places don't even consider rebuilding heads. So many are cracked and a new head can often be purchased for about the same as it costs to rebuild.
you should check out how they fix cracks in india somewhere I believe and they do a pretty great job for people with low resource its amazing you guys have all the machines they have
I don't think it is harmonics on the ramping-up cut on the final cut on the seats. I think there is no backlash in the spindle because it is powering up. It has to do with the frequency of the phases of power in the motor. I would think that the machine has a DC servo drive in it so this theory may be incorrect. What do you think?
@@Look_What_I_Did out of all the shops i follow here on YT, Nick has been the only one to respond to a personal email about the engine i am building. And they are one of the higher sub counts. As busy as they are creating and editing content and answering messages on here to answer and chat with a personal email.
Good job! Sorry you missed the cracks. But I say 100% . It’s better then a remanufactured out of the box head. So the customer got a way better product
Im fixing a Navistar 466 and it has a small crack between 2 valves. As long as it wont overheat I think it should be good. Ask me in a few month and see if it survived
I worked at a small local machine shop and we did a lot of valve jobs. My job was to disassemble, clean the head and parts and grind the valves. The boss would grind the seats with stones. A dirty messy job and in my opinion not very accurate. Then I would reassemble the head. I would have loved to have had one of those Serdi machines.
I'm glad to see that there is a honest company still.
Agree 👍
In my limited experience, small companies that have been in business for a while, tend to be much more honest than ANY big corporations 🤷♂️
Ok
Yeah theirs a transmission shop in Texas that's the same way.... I would love for these guys to build me a motor and the Texas guys build me a transmission.....
@@MikeRatcliffe24 haha ok
I'm not a machinist or (car) mechanic. Just a electrician. But i really enjoy watching your video's. The skill involved doing the things you guy's do is really great to see. Greetings from the Netherlands
"Just an electrician" he says! A cousin of mine was electrician, and the problem solving skills he had when it came to figuring out a scheme for the multitude of jobs he did was amazing. As a telephone/comm network installer, I've done the same kind of thing. None of us are "just".
Never sell yourself short. You are a skilled tradesman. There will always be a need for the trades. Signing off, Plumber Ray.
Thank you for taking the time to watch!
@@JAMSIONLINE send it to india,,they,ll fix it.. watch there vids.. amazing..big diesel re builds..
@@harrywalker968 was just watching a vid from india/Pakistan of them casting a huge involute gear, like multiple feet thick. Those guys are impressive for making do with less, but it's kind of scary the lack of any saftey equipment (open sandals in a metal shop, plus the child labor).
"New bare casting" "ready to assemble" I like the thorough check of the new head they are never right on
We check every new casting! Never know what you're gonna get.
@Jim's Automotive Machine Shop, Inc. you aint kidding even brand new heads from cat get a straight edge check
Do you guys get many 6.0 ford diesel heads come through the shop? Or did you in the past? They were kind of notorious for the head bolts stretching/heads warping/cracking (which lead to head gasket problems) . 6.0's are starting to get kind of old now, but there are still plenty of them on the road, was just wondering.
QC was smoking too much pot, Jim and Nick had to redo their shoddy work!
It's impressive that you check the heads to spec even though the manufacturer stated they were in spec. Thats an extra step you take to give you the confidence that the parts you give to customers are the best than can be. Really nice work!
They can print anything on a tag. If you don't want comebacks you better check EVERYTHING especially these days. Just the other day I had a set of new pistons come in for a job that 2 of the 6 were .005" oversized past the limit. While they physically would fit in the bores it would have seized as it was warming up and failed the engine.
@@bcbloc02 always amazing as to how for close tolerance parts, the manufacturers charge so much yet never seem to be anywhere near desired tolerance limits
You never do know whats behind the door until you open it up and have a good look. I was more surprised by the machining requirements on a new head. How many brand new vehicles out there are sold with an engine that could have been made to better tollarance.
Keep up the great work guy's.
David in the UK.
"How many brand new vehicles out there are sold with an engine that could have been made to better tollarance?" All of them!
Yep! I'm sure 99% of new vehicles are "good enough", but that's one of my least favorite phrases haha
Cummins has a brand new manufacturing tolerance for all new engines and components, at .014", which is MASSIVE
@@bingusmctingus4395 which tolerance in particular is .014"? Lots of different clearances in an engine
I admire and respect the that y'all don't settle for " good enough" and always go the extra time and effort to make things "as good as they possibly can be." Great content, keep up the good work!
I work in healthcare, so I don’t know much at all about machining, but I really enjoy watching your videos! Very informative and educational!
I rarely do the work you guys do but I can honestly say that next time I do this work I will have new knowledge to use so my motor assembly will be even better than before.
You two are the most professional of engine re-manufacturers out there. If I lived in the states and needed an engine rebuild I certainly would send it to the cleaning guy and his kid!
You were small when you got me as a subscription holder. Glad to see you are doing well and growing. Great day today to you both and have a great day today.
Thanks for sticking around!
@@JAMSIONLINE I have been learning a ton of different things from watching the channel as much as I can. Quality content
@@JAMSIONLINE P.S., always welcome.
You always seem to make these parts *better* than new, which is really cool. Also the noise of taking the vacuum tester of the head was a nice satisfying PWOP
I agree lol
A TRUE Engineer ALWAYS will since factory are built to cost, with hand builds it's down to the skill and integrity of the Engineer.
These guys are the definition of do you want this done right or right now. Their knowledge and attention to detail is well worth the costs to get your part is done “right”.
Spend more now, cry less later.
I have been in this trade for seven years now post my apprenticeship. Watching your videos has inspired me. I look forward to being the owner of a machine shop. You and your Dad make an awesome team and the workmanship is top-notch.
To deliver high quality products, it’s the quality of service that overcomes quality in parts! 👏👏👏
Those cracks are SUPER common on 3406E and Acert series. Seems the firing deck expands a bunch. The deck is very thick and if it passes a leak check we were instructed by CAT to never worry about it. But I agree with your assessment to replace.
Was just about to say this. Almost every one I have seen has at least 1 cylinder with that crack.
I like your way of thinking, customer first, they expect nothing more than the best and you guys deliver. If everyone did as you do, the world would be a much better place.
I noticed the same thing in 6-92 Detroit engines where they would crack between the valves and trash the head
We'd get well over a million miles between teardowns on 6-71's and less than 250k on 6-92's
Really enjoy the videos and your cleaning guy is top notch 😉👍
I’m a hobby car builder from an electrical background but I really enjoy these videos. The time you take to explain what and why you do stuff is just fantastic and I love the honesty in why you guys do things. All the best from Ireland 🇮🇪
Coming from a long line of machinists, it's nice to see manual machining done with care. Of course CNC has its place but there is no substitute for the art of machining something with analog tools.
I would love to just hang out in the shop every now and then. So much knowledge there.
Interesting stuff. Thanks for posting.
Done Right Everytime with Excellence is your motto.
Love your videos.
We all get caught up by the crush of time! Being man enough to admit to it just proves that you live with your personal standards and aren’t afraid to correct yourself ratther then send out a poor product!!!! Proud to watch your vids!!!!😊
Congratulations on approaching 500k followers. I respect your honesty and that’s integrity.
As long as his injection components and his piston clearances are good, that’s gonna run like a scalded dog. Good, quality machine work on an engine like that isn’t commonplace. Even though you’re really far away from me, I might be in touch for some work from you guys purely for the quality of work that you do. Plus it’d be cool to see my heads on RUclips lol
Yes they really are meticulous
I could watch you guys do this all day.
Wouldn't you get bored lol
@Roger-hp1yg ...well...maybe a slight exaggeration on my part...
I really enjoy watching you apply your skills and experience in your craft. It's part of my job as a cnc tech to make the machines deliver precision to allow the machinists to produce the best quality aircraft engine parts on this planet. I will fly on any aircraft sporting our handy work dangling below the wings. You only have one reputation to live by and you are doing a good job at it.
Your ability to admit a mistake (parts before inspection) so candidly makes me wish you were closer so I could do business with you!
Great video, guys so relaxing watching you guys do some machining. If I wasn't dumb I'd like to be a machinist. I'm dyslexic and have ADHD ADD all the fun stuff, lol. But I still like building engines. I wish I could tune an ECU through. Cheers from Canada 🍻
Excellent! Glad I was around this stuff when I was a kid!
Worked at a machine shop in the late 80’s interesting to see how things have changed.
Question: up until a year ago i worked for a car dealership as a master tech (finally retired...YAY!), we were always told to use valve lapping compound on new valves/heads and to hand lap in all new valvetrains before installing the new heads.....I am now wondering, is this because possibly the runout on the new heads seen here? what are your thoughts?
Lapping valves is a pretty heavily debated topic, but at the MOST the only lapping that should ever be done IMO is with very fine grit (not what they sell at Autozone) and a very quick lap just to check the contact patch. No amount of valve lapping will correct an improperly cut valve seat. I think it's more of a situation of old habits die hard.
As someone who spent significant time in both worlds it's about time and money. Most mfgrs will have you swap valves, springs cam followers, etc into a new head. It would be rare for a dealership to have a valve grinder 9or someone with knowledge how to use it) and sending valves out to a machine shop would add multiple days to the repair. No tech wants a car torn down in their stall or a thousand engine parts laying around to get lost while waiting for valves to return from the shop. The valves are lapped simply to clean the face then visual inspected to see if they are reusable. With hardened seats lapping does nothing to enhance sealing. It's a throw back to the days of softer metals where you could enhance to seal by removing metal with lapping paste and lots of time.
Not sure how this showed up on my feed, but loved the video. You all are masters of your craft.
Great video guys really enjoy watching. Been in the Automotive field going on 35 years including the manufacturing side. watching your videos makes me feel right at home. Keep up the great videos guys, be Blessed.
Wow you guys really do great work. Its near impossible to find anyone interested in doing the work to blueprint spec. Good job
Nice 👍 !
I’ve had to learn over the years to pay attention to detail, several times. So don’t feel bad, it happens to all of us from time to time. At least you caught before any real work began. I hate investing time and labor into a piece only to find it was scrap from jump street and should have been caught up front.
But still, with the work you did do to a brand new aftermarket cylinder head, I’m sure your customer had very little to complain about.
I might just have to bite the bullet and drive my stuff to you guys, I'm in awe that you take such measures to ensure the job is done right. Work like you all do is extremely hard to find nowadays and the extra expense would be worth it to me. I can't stand hearing the shop I use saying, "You're not building a space shuttle"
Such care and detail... nice to see QC maintained as first criteria.
It’s great to see a good honest company. I enjoy watching your videos
I love learning from people that know what they're talking about.
I've got enough machining experience to know when people are BS-ing.
You, sir, know what you're doing.
Haha, I hope you're right! :P
Glad you double checked their work. Makes for a good machine job.
It's good to see people that take pride in their work
Nicely done! Experts still make mistakes, they just recover quickly and gracefully.
Nice result!!, greetings from Dronten, the Netherlands.
Would appreciate you relocating the shop to Central Texas as soon as possible......Would be happy to make you our sole source machine shop for all our machining work...
Great work as always....
Now to go to our shop and weld out two seized and broken 6.7 injector hold-down bolts in a method much like your way of doing it.
Enjoy your videos. I've been burned by that old don't order parts until you know the whole situation rule as well. Difficult to resist trying to save the time.
I’m not a fan of using aftermarket parts on motor overhauls but you being a competent machine shop I can see saving some money.
As a retired 45 years Tool& Die Maker love process you guys go thru as I always told my apprentices learn the process so how are you regrinding your cutting tool using surface grinder or a specialized tool grinder?
That's what you call extra mile! Well done!
Yeah, you’re almost at half a million, great job guys!
Nice video. Your valve seat runout measuring tool is the coolest bit of hardware that I have seen in quite awhile.
Thanks! I agree, it's a cool tool. We get lots of fun specialty tools in this industry that aren't seen other places!
Hey that ramp up technique is a thing Hass machines do to break chatter. They oscillate between two spindle speed and compensate for the depth of cut
Yep! Soon we will be installing an upgrade on the Serdi which allows constant spindle variation around a nominal speed, which helps reduce the chatter. Just haven't gotten it ordered yet!
You guys do good work.... love the drive to improve..
All I can say is you guys are artist at what you do
We all get cart before the horse at times great video thank you for your videos
Quality service right there. They could've just sold the new head without cutting the valve holes but they didn't. Never see companies that honest anymore. Any business that does something like this is worth the little extra money.
It's great to see your channel approach 500k subscribers. You and your Dad do a great job. It really doesn't take that much more time to be anal and shoot for the best results you can achieve. Machine shops are dying off and closing all over the country. So, I hope your channel and your workmanship is helping your business stay very busy.
Thank you! We are actually busier than we can handle, but that is a good problem to have!
Caterpillar heads crack between the intake valves. Cat spec is if it's not beyond the valve seats it's reusable. There is no coolant between the intakes seats, hence why they crack.
Very common on 4 valve heads .
Kinda concerning but if no coolant behind and seat pocket s stay tight it's allowed.
Where can I find the cylinder head spec sheets I see in your videos ? Having complete head information prior to performing a job is always a plus but as a "home machinist" not a shop I often do not have this critical information and have to search the internet for what often is found to be questionable information.
The spec sheets we have come from AERA Prosis Pro. www.prosispro.com/
I am just amazed as to how they divide an inch like it's in nanometer
We all make mistakes. The thing is you corrected it by supplying the customer with a new head. Good job guys.
Thanks for posting the video, they are always interesting and informative.
job well done 🎉, chapeau bas monsieur, 😊 , from the technical view you and your dad are master of art , so glad you put your knowledge and expertise to the world to see 😊🎉
Really enjoy your thorough work - you've got another subscriber 👍
My dad would have plugged that old head, pressure tested it. God bless him he was an excellent Machinist.
Lovely work as usual.
I recently rebuilt a 366 bbc. Not even 10 seconds after start-up 3 wrist pins seized in the pistons. Have you ever come across something like this? The pistons and rods were done at a local machine shop. Those 3 bound up so hard the rod doesn't even move in the piston
Great work like always
I want my engine to fail so I can send it to you guys. Fantastic work.
you guys do awesome work! love this format of video hope you guys can do this for a long while!
Do they? Calling out cracks that exist on EVERY diesel head? I'll bet $100 you didn't know that, but still praise their work.
It is very interesting and enjoyable with honor and a living conscience. Cheers guys 👍
When we did valve jobs or whatever, the first thing done was to check for cracks. Was common enough for us to do this every single time.
This has me wanting to have my trick flow heads checked. I spent a lot of time and money having my block decked, bored and machined to perfection. Do I take trick flows word? Or send them off to be perfected as well?
What are your thoughts on cutting most of the way on the seat angle with lower speed (to preserve tool life) and do a "spring pass" at the end with higher speed?
As the owner of one of these engines, I can tell you that those cracks between the valves are common on the C12, and generally don't cause any real problems. But I do understand that if you're going to stand behind your work, you'll want to reassemble it without the cracks. When I overhauled my engine, I installed a head that had a couple of cracks like that. 250000 miles later, I haven't seen any problems because of it.
Love that Serdi!
The future is now! But I still can't see it yet?
That CAT will run better than new
well done!
Love your voice-overs.
That head is better than new! Do people still use grinders to cut valve seats? or does everyone just machine them now?
It still gets lapped junior. It doesn't matter.
I've seen videos of people welding heads where there are cracks and then machine the heads for a rebuild. This doesn't sound like a good practice, but I would like to know your thoughts on welding defects and then machiningback down to size.
Half million subscribers that's amazing.
Thank you for your knowledge and video's USA 🇺🇸
Out of curiosity, do original new cylinder heads have much scatter in valve depth or valve seat concentricity? You seem to have achieved a very consistent median value of recess and concentricity of the valve seats after reworking the aftermarket head.
That's why many places don't even consider rebuilding heads. So many are cracked and a new head can often be purchased for about the same as it costs to rebuild.
you should check out how they fix cracks in india somewhere I believe and they do a pretty great job for people with low resource its amazing you guys have all the machines they have
I want my to fail so I can send it to you haha great work like always!!
Amazing work guys! Wished you was closer to me so i could use you.
Really like your work , very satisfying to see quality work.
Great work dude.😃😃
I don't think it is harmonics on the ramping-up cut on the final cut on the seats. I think there is no backlash in the spindle because it is powering up. It has to do with the frequency of the phases of power in the motor. I would think that the machine has a DC servo drive in it so this theory may be incorrect. What do you think?
Keep up the great work fellas 😎🤙🇺🇲
Always great content, keep up the good work guys. 👍
Do you guys ever build engines for truck or tractor pulls? Has Pop ever built a competitive tractor for pulling to enter in one of the many classes?
BEAUTIFUL!
Nearly half a million subs and still had time to chat in an email. Thanks! Hopefully found enough parts for my d Jimmy motor!
How does subscriber count have fuck all to do with communications?
@@Look_What_I_Did out of all the shops i follow here on YT, Nick has been the only one to respond to a personal email about the engine i am building. And they are one of the higher sub counts. As busy as they are creating and editing content and answering messages on here to answer and chat with a personal email.
@@danielhildebrand6892 They are good on anything but a diesel. Which is weird... but it is what it is.
maybe I missed it, did you verify the new head is perfectly level? seen sometimes where from the factory they are off lol
Good job! Sorry you missed the cracks. But I say 100% . It’s better then a remanufactured out of the box head. So the customer got a way better product
Im fixing a Navistar 466 and it has a small crack between 2 valves. As long as it wont overheat I think it should be good. Ask me in a few month and see if it survived
I worked at a small local machine shop and we did a lot of valve jobs.
My job was to disassemble, clean the head and parts and grind the valves.
The boss would grind the seats with stones. A dirty messy job and in my opinion not very accurate.
Then I would reassemble the head.
I would have loved to have had one of those Serdi machines.