LS heads changing Valve seals in the vehicle. With or W/O Air
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- Опубликовано: 5 ноя 2019
- Swapping the valve seals on Cylinder #8 on my LS swapped S10 Blazer.
I try to discuss the steps, why for each and offer alternatives for securing the valves if you can’t charge the cylinder with air pressure. 
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I watched this to learn how to remove and install valve seals.....then you cut away for that exact part of the job! Lol nice!
Remove old seal with channel lock pliers, install new seal with appropriate sized socket if you don’t have the install tool.
The “Tophat” style seal and locator combo is the easiest and best choice for single springs. Select a socket to fit over the metal area and install.
Two piece seal/locator is a little tricky, install locator then find out whether a 12mm or 13mm 12pt socket fits the top of the new seal best to safely install the seal without damaging the viton/rubber part. It’s best if you can add a little lube and try to just push the seals on, only tap them down as needed to seat fully.
It will be self-explanatory when you’re in the process. JD
so much badassery and common sense in this video, its refreshing
Dolla Tree Dave Thanks Dave, always trying to make everything as simple as possible with alternate options. Thanks for the feedback! JD
You sir are a genius I love that trick
Me and my dad did the rope trick on an old 1980s Pontiac V8. It was a very low milage car that sat long. So the valve seals were tight from old gas. And made the valves stick open long!
"Apparently today I'm retarded" I almost fell out of my chair.
good video old man thanks
Hurry up and get it done LOL nice video
Mike Gore Slow progress, finally I have clearance between the driver side exhaust manifold and the steering shaft. Today I was able to get the new A/C delete heater box installed. Baby steps, stay tuned I’ll have some turbo videos coming! JD
I almost always just zip the rockers down on LS's when they're in something of mine. If its someone else's I'll put them at 22ft/lbs. So far so good on both ways lol
SniderTron 3000 I was confused about the possibility of the valve spring pressure giving a false torque reading when the valves are partially open. I always torque the rocker bolts but never have used the EOIC method as recommended.
If valve spring pressure can affect rocker bolt torque, then the dual-spring setups would be even worse. 🤷♂️
But imho you’d compress the plunger in the lifter before affecting the valve spring very much. 🤔🤔🤔
This is great cuz I’ve been watching both of y’all’s vids back to back for ideas with my truck lol thinking of going with a Btr stage 3 chromoly push rods ls7 lifters melling oil pump and 3k stall
Is there a video on how you made you spring compressor. I've got a couple in my box that are junk and this one looks awesome. Thank you for all the videos
Sorry, I had talked to a friend about making another spring compressor like mine, it’s my prototype. Would you be interested in purchasing one? My hope not really plan was to market the compressor and sell it for a reasonable cost like $50.00 not the crazy price I see on others. Again I apologize for losing track of your post! JD
This is a great video! You shared some great knowledge. Your valves and the surrounding area look super clean compared to mine. In my engine, the valves and springs were all covered in oil. Is that normal? I know my valve seals have failed and I am replacing them but wasn’t sure if oil should normally be present all over the values.
The engine in this video was a new build, maybe less than 500 miles. I had to of damaged one of the seals on that cylinder.
On factory engines with high miles there’s always dark oil staining on everything. JD
Thank you fit this. Hello be a lot
EOIC doesn’t matter on the LS. Been doing these since the LS inception and found taken the rocker arm bolts down evenly works the best. Factory spec is 22 ft lb and I never had an issue. Beam type torque wrenches are way better than click type on smaller fasteners. Seen guys with clickers pull the threads out by not paying attention to their settings.
Mike MacCracken I’m glad you commented about the rocker bolt torque. I was thinking you should collapse the plunger in the lifter before anything I’d think.
I was told and seen guys claiming GM recommends the torque on the heal of the cam, so I thought I’d try it and mention it to see what most people thought.
My 1/4” torque wrench is about 1 ftlb short when compared to the beam style.
I’m hoping these new valve seals fix the oil in the exhaust port issue!
Thanks again for your feedback I appreciate it! JD
Jeff I can email you the GM document on how the factory does it.
Jeff I emailed you the GM factory document for valve adjustment. Happy reading.
@@mikemaccracken3112still have those specs?
There is an updated valve cover for this engine. The left side valve cover has the pcv system built into it. If you buy the updated valve cover it will eliminate this issue.
I know this comment is a year old but i just came across this video and wanted to say my 5.3 Saab 97X has a issue where driving down the highway for a bit it will randomly puff out a big cloud of blue smoke. It's weird because there does not seem to be any pattern to it except never having seen it happen in the city.
I thought maybe highway speeds/heavy vacuum was sucking oil through the terribly designed pcv so i bought the updated cover and it didn't go away.
Not sure what else it could be. I'd think if it was a valve guide it would happen consistently.
Thank you for the advice. The rope trick is a new one for me.
Stealthy Wolf The rope trick was a carry over from my Pontiac V8 days. I learned the rope trick for holding the valves up and believe it or not the Pontiac guys will loosen both rockers closing both valves, then put rope in the chamber to stop the engine from turning while they torque the dampner bolt to 160# 😳😳😳. Thanks for watching and the feedback I appreciate it! JD
That makes sense, the 160 is probably to compress the rope to make sure it compacts against angled ports and keep the space you need to remove the keepers.
Stealthy Wolf If your only servicing the valve springs or seals you won’t need to torque anything. You can just feed the rope into the cylinder to hold the valves. Yes holding the valves fully shut is the goal. 👍
That makes sense.
I have a 98 camaro that I’m swapping the cam in. I have 806 heads with older style valve seals where the seat and seal are separate. The cam kit I ordered came with the top design valve seal and I’m wondering if can use the top hat style with out issues, or should I just order older style seals?
Yes you should be perfectly fine running the top hat style valve seal, don’t use any other Shims It should assemble fine. I never understood why GM chose to use a two piece locator/seal set up when the top hat is far superior? Who knows.
The only time you see a two-piece locator and seal combo nowadays is if you’re running a dual spring, if you have a duel spring you have to run the two piece seal and locator.
Is that intake manifold the Dorman 615-183? Did you notice any leak at the seems?
I didn’t notice any vacuum leaks at the o-ring seals between the sections. I had tested for vacuum leaks many times because I never got this intake to idle and have low throttle response on my 4.8. I switched to a port matched regular truck intake and my 4.8 ran way better at all rpms!
I think the huge plenum and runner design of the 615-183 intake might work better on a bigger engine 6.0+. JD
Probably a dumb question here but I would like to use the air compressor method to hold up the valve seal. I cant seem to find a hose or the right fittings for the spark plug hole to make my own hose. The auto parts store guys haven't been able to help me. Can I buy a cylinder leak down tester for this use? Any help would be appreciated. Thank you.
Ryan Aney Yes, buy a cheap cylinder compression gauge and adapt it to an air hose fitting. Turn the regulator down a tad, too much pressure can turn the engine. This is what I had to do! Thanks for watching and the feedback! JD
@@HeadFlowInc JD thank you for the quick reply. I've been looking at them just wondering if I could make it work. Thanks again great video. I subscribed
Probably good idea don’t take no chance I thought could hold up lifters with dowel rods put them in and lifter hit pan , wrong hole I guess lol
Did the occasional puff of smoke on startup go away after the #8 valve seals install?
Yes perfectly clear after the seal was replaced. I even bought a real seal installation tool to avoid damaging the seals. 👍
question, im going to change all my valve seals while its in my suburban. i have the correct tools including air hose etc. Now when you say start off on number 8 and you have it tdc. you then have to remove rocker arms and rail.. but after changing valve stem seals i want to move down the line and do the rest. How do you know the next piston is at tdc without the rocker arms on?
You can start on any cylinder you want as long as you guarantee. It’s at top dead center so there’s less volume to contend with. Plus, if something were to go wrong, the vowels won’t drop as far if the pistons at TDC
Without the rocker arms on, you’re gonna have to be able to see the lifters via the push rod or find a way to use a straw through the spark plug hole to be able to feel when the Pistons at top dead center
What psi needs to go into the cylinder to keep it from leaking past when compressing the spring?
50-60+ should be fine unless you have really bad ring seal. If you try too much pressure it’ll start to rotate the engine so you’ll know it’s to high. JD
my number one cylinder is giving me problems with fouling spark plugs. I will do a compression check but i assume this is the valve seals that I am having problems with. would you agree that if my compression check is good this is what is causing all the carbon buildup and spark knoking i get?
If the spark plug is oil fouling but it has good compression numbers it could be valve seals. Normally a bad valve seal will cause a smoky startup from the seal seeping.
Also check your coil isn’t going bad and verify there’s no issue with the PCV valve pulling oil into the intake manifold.
An old trick, swap the coils between two cylinders and see if the issue follows the coil. JD
@@HeadFlowInc Great recommendations. I will look into it.
I’ve been trying to do this, but when I hook the air up to my cylinders I get air coming out of my intake manifold. Is that normal?
Edit
Both valves on the cylinder have to be closed. Once you remove the rocker arms the valves will be closed.
I recommend slowly Rotating the engine until both valves on the cylinder you’re working on are closed then remove the rockers
Why didn't you turn the crank to move the pistons? Seems a lot easier that way
The cylinder I’m working on is at TDC, there’s no reason to move the crankshaft. Thanks for watching and the feedback! JD
How much psi does it need to keep valves for falling down? Thanks
Make sure the piston is a TDC for each set of springs/cylinder so if you have an issue the valves can’t physically drop all the way into the cylinder.
I’ve always used 80-100# of air pressure where my regulator stays.
I think your question brings up a good point; what would be the minimum acceptable air pressure? I don’t know for sure if you put to much air pressure in the engine could try to rotate?
If you have a cylinder you can’t get the air hooked up don’t hesitate to use the rope trick to hold the valves up. JD
@@HeadFlowInc thanks a lot!
Yzn
50psi
Will that rag pop out it you just turn the crank?
RichWil I’m not sure what rag you’re referring to? Compressed air is holding the valves fully closed. JD
I would assume no, not if you do it like he did here. You should just remove the spark plug and plug the spark plug hole with your finger. Rotate the crank till you feel the pressure push against your finger. That's the compression stroke wait till it reaches the top and the valve height is even and your at tdc roughly.
Amigo, how much its labor cost? On valve seals replacement!
Heads on/off the vehicle? I’m sure it would make a difference; I only work with the heads off. JD
Is that a pcv filter on the oil cap? That’s brilliant!
soyramflero Yeah, it’s a separator style filter I was using to vent the crank case. I’ve had bad luck trying to run a PCV valve, sucking oil from the valve covers.
I was pretty proud of my idea drilling the hole etc to fit the oil cap with a grommet. I’ll admit, the filter fits so tight I can’t really get it out! Lol 😂 It works great though 👍👍
Thanks for watching and the feedback I appreciate it! JD
HeadFlowInc did you make a video on it? I was considering making my own catch can. This seems easier
you can also use a balloon ,stuff it in the hole and fill and tie off ,you need 8 balloons , its party time
Interesting idea, I’ve never heard this tip before but it sounds like a great idea! JD
@@HeadFlowInc when I worked on large ship engines we used large bladder balloons to hold the valves up rather then take off a double cylinder head on a v 16 cat engine it was a 399 cat ,this was in my younger days I'm 70 now but I haven't forgotten , your smart you jumped on that right away .
@@oldbiker9739 Cat now makes a bladder/balloon that looks almost like a condom that actually works pretty well. And if it was to break, With the bore camera we have today, retrieval is really easy.
@@Pyle81 well that's good to know thanks
small rope pushed in cylinder then raise piston will work also
Hey, do you have a website or email to ask direct questions? Do you accept work? I looked headflowinc up and found something in raymore mo, not far from me. Can we communicate by email?
Shaunthepyrotek jeffdubray@gmail.com
Man just change the valve seals
You didn't show replacement of valve seals
Once you have the valves supported with air, compression and remove the valve locks, remove valve springs then replace the valve seals. If I didn’t show it I apologize I figured the seals were the easiest part. JD
9:04 "I'm having to work off camera", dude your camera is on a stand. Be honest, you fucked something up or didn't want to show the most important part which is how much fight you gave it to pull those seals out. Fail video
🤣🤣🤣