I had the same look on my head gasket as you encountered, appears to be corroded coolant paths. I asked my machine shop about it. He advised that the head gasket is made with those holes blocked off . This is to ensure sufficient coolant flow to the back side of the head. He pointed out that the new head gasket did not have openings where the corrosion appears on my old gasket. Just thought I would pass that along. Also thanks for the videos, they are the best on the internet for a 4.0 rebuild.
Another job well done my friend!!!... Great video... Here's what I got going on now with my 92.... So I went to Jeeptoberfest in Ocala Florida last weekend. I decided to do the modified course. I think they call it modified....because when you come off the course, your jeep may have been modified by the course....like mine... I ripped and kinked the exhaust pipe and it got louder....lol... I was able to still drive it 100 miles back home, it was just a bit loud. I scooted myself under her yesterday to take inventory of all the parts I'll need to repair it....and then decide while I was under there.....to rip the underside apart. I dropped the transfer case and went forward with my SYE kit mod that I've been sitting on for the last 3 years... I just finished modding the xfer case about an hour ago... Not too bad of a job...except for those damn lock ring clips.... so now I have to get started on the exhaust... I'm going to make some heat shields out of some sheet metal scrap I got laying around. The passenger side floor pan gets really hot and I'm hoping that some simple heat shields will help that...
Wow, and I thought my head and pistons looked bad! Lol, now I dont feel so bad with how mine looks. I am currently rebuilding my 4.0 head, it all began with only wanting to replace a cracked exhaust manifold. But with oil seemingly leaking from every conceivable place on the engine, I decided what the hell lets drop the oil pan and replace the gasket. Yeah easier said than done. I still wonder if I shouldve replaced the RMS as well. I ordered one but my attempt at it started a lil bad, so I decided not to mess with it. Anyways, great video and definitely helps me navigate through this new adventure! Never opened up an engine before, so kinda nervewracking... Thank you!
For a second i thought you were gonna throw the head away as a joke in the parts cleaner. It looked like a Trashcan and didnt expect it to be outside lol
I recently learned those coolant passages are blocked off by the head gasket! I about had a heart attack after my install when i was watching the videos and pictures i took of the install. I thought head gasket was faulty but nope! Designed that way
Great video. See if I did mine before watching.... I'd replace all the valves, retainers, springs. Did not think you could or would reuse the old stuff.
Sadly your daughter now knows more about working on cars than I do. And I just bought a 40 year old CJ7 that needs work. Oh what have I done. But I love watching your videos. Jim
JIm, I've owned a CJ7 for 20 years and have only recently learned to work on it beyond basic wiring. EweToob is a great resource as is the Hanes manual (albeit black and white photos). Start with something straightforward like the nutter bypass, work your way up to upgrading the original carb if necessary. Most rewarding was treating the frame from surface rust and installing a Bluetooth stereo (phone directly to amp - no need for head unit!)
KENFEDOR22 Well, I spent the better part of today cutting out rusted out floor boards and trying to weld replacement floor boards back in. I have no welding skills so it was a challenging day. Earlier this week I removed the gas tank so I wouldn't set the Jeep on fire when trying to weld. Also removed the heater box the fresh air intake so I could rebuild those. Frankly I've got a love hate relationship with this vehicle, it's really more work and expense than I was planning on so I wonder should I cut my losses and sell it. Still, the potential to have a really nice vintage Jeep keeps me working on it. While I couldn't call today's efforts a total success, they weren't disastrous either. Hopefully tomorrow will be better. Jim
Check your new head gaskets. Pretty sure you will find that those are small holes. They are small enough that it doesn't take much to plug them up. I believe they are supposed to bleed off air? In any case they are not supposed to move a lot of water. Interesting that you pop them first. I never bothered to do that. I just take them apart with the spring compressor tool. And a magnet. Skinny little magnet is very handy but I've used a pick too. Speaking of better spring compressors. I agree. I have two of those style you used, and I have one that grips around the whole head. My favorite is the one I made from a sliding adjustable C clamp. It is almost as fast as the lever one I made and lost.
@@JeepSolid Yeah it works but it is scary as hell. You don't realize how scary till the tool slips off the spring AFTER you have removed it. Makes you gun shy real fast. lol That is why I made one from a clamp. I should make a video of it to show you how nice it is.
Those holes being plugged is probably why the heads on these crack and they run hot. If the coolant was maintained like the oil on this engine I can see why they are like that. Looks like hard tap water was used in the past. I always take a round file to those hole and remove casting flash for better flow.
Hi Jeep solid it's been a while. Your videos are cool and instructional but that is one job I won't venture into doing.lol If you ever have the chance could you make a video on to change a belt?
Hi, I have a question. I have a jeep wrangler of 1990 when I went to the mountains at a certain height I was turned off because there is no fuel. Can I make a modification to solve that?
I love showing my son how to work on vehicles but it usually end with all my tools lost and put in random places lol, hes 3! Way to go getting the woman involved. She will thank you later when she knows more about cars than her hipster boyfriend.
I recently did a head job on my LB9. My heads were in much worse shape than yours, so I took them to a local shop. They lapped the valves, hot tanked everything, resurfaced the head, put on new seals, and gave it a coat of paint! Not bad for $250!
I had the same look on my head gasket as you encountered, appears to be corroded coolant paths. I asked my machine shop about it. He advised that the head gasket is made with those holes blocked off . This is to ensure sufficient coolant flow to the back side of the head. He pointed out that the new head gasket did not have openings where the corrosion appears on my old gasket. Just thought I would pass that along. Also thanks for the videos, they are the best on the internet for a 4.0 rebuild.
Dale, you are such a good dad. I did the same thing with my Katie. She's smart & appreciated the correct, valid info.
Great video Dale. So cool teaching your daughter too!
Thank you! It was fun having her help.
Thank you for teaching me!😄
No problem!
Another great video. Giving me great hope that one day my daughter will be out there with me too. Perfect bonding and instructing time.
It was fun having her help. She enjoyed it too.
Teaching your family! That is fantastic. Time well spent!!
Yeah! She was super helpful. I'll include the kids on future videos.
Another job well done my friend!!!... Great video...
Here's what I got going on now with my 92....
So I went to Jeeptoberfest in Ocala Florida last weekend. I decided to do the modified course. I think they call it modified....because when you come off the course, your jeep may have been modified by the course....like mine... I ripped and kinked the exhaust pipe and it got louder....lol... I was able to still drive it 100 miles back home, it was just a bit loud. I scooted myself under her yesterday to take inventory of all the parts I'll need to repair it....and then decide while I was under there.....to rip the underside apart. I dropped the transfer case and went forward with my SYE kit mod that I've been sitting on for the last 3 years... I just finished modding the xfer case about an hour ago... Not too bad of a job...except for those damn lock ring clips.... so now I have to get started on the exhaust... I'm going to make some heat shields out of some sheet metal scrap I got laying around. The passenger side floor pan gets really hot and I'm hoping that some simple heat shields will help that...
Sounds like it was a fun course! Glad you were able to limp it home. SYE is on my 'to do' list as well.
Wow, and I thought my head and pistons looked bad! Lol, now I dont feel so bad with how mine looks. I am currently rebuilding my 4.0 head, it all began with only wanting to replace a cracked exhaust manifold. But with oil seemingly leaking from every conceivable place on the engine, I decided what the hell lets drop the oil pan and replace the gasket. Yeah easier said than done. I still wonder if I shouldve replaced the RMS as well. I ordered one but my attempt at it started a lil bad, so I decided not to mess with it. Anyways, great video and definitely helps me navigate through this new adventure! Never opened up an engine before, so kinda nervewracking... Thank you!
For a second i thought you were gonna throw the head away as a joke in the parts cleaner. It looked like a Trashcan and didnt expect it to be outside lol
I recently learned those coolant passages are blocked off by the head gasket! I about had a heart attack after my install when i was watching the videos and pictures i took of the install. I thought head gasket was faulty but nope! Designed that way
Super impressed by her. Way to go!
It was super helpful. I actually left her to work on it a bit while I edited some video. Haha
Great video. See if I did mine before watching.... I'd replace all the valves, retainers, springs. Did not think you could or would reuse the old stuff.
Sadly your daughter now knows more about working on cars than I do. And I just bought a 40 year old CJ7 that needs work. Oh what have I done. But I love watching your videos.
Jim
Thanks Jim. Just stick with it and you'll learn a ton 👍
JIm, I've owned a CJ7 for 20 years and have only recently learned to work on it beyond basic wiring. EweToob is a great resource as is the Hanes manual (albeit black and white photos). Start with something straightforward like the nutter bypass, work your way up to upgrading the original carb if necessary. Most rewarding was treating the frame from surface rust and installing a Bluetooth stereo (phone directly to amp - no need for head unit!)
KENFEDOR22
Well, I spent the better part of today cutting out rusted out floor boards and trying to weld replacement floor boards back in. I have no welding skills so it was a challenging day. Earlier this week I removed the gas tank so I wouldn't set the Jeep on fire when trying to weld. Also removed the heater box the fresh air intake so I could rebuild those. Frankly I've got a love hate relationship with this vehicle, it's really more work and expense than I was planning on so I wonder should I cut my losses and sell it. Still, the potential to have a really nice vintage Jeep keeps me working on it. While I couldn't call today's efforts a total success, they weren't disastrous either. Hopefully tomorrow will be better.
Jim
Check your new head gaskets. Pretty sure you will find that those are small holes. They are small enough that it doesn't take much to plug them up. I believe they are supposed to bleed off air? In any case they are not supposed to move a lot of water.
Interesting that you pop them first. I never bothered to do that. I just take them apart with the spring compressor tool. And a magnet. Skinny little magnet is very handy but I've used a pick too.
Speaking of better spring compressors. I agree. I have two of those style you used, and I have one that grips around the whole head. My favorite is the one I made from a sliding adjustable C clamp. It is almost as fast as the lever one I made and lost.
Yeah, the C clamp style is nice. This is just what I had available. It did the job though.
@@JeepSolid Yeah it works but it is scary as hell. You don't realize how scary till the tool slips off the spring AFTER you have removed it. Makes you gun shy real fast. lol That is why I made one from a clamp. I should make a video of it to show you how nice it is.
Great video!
folding the bottum flap of the box like that is a pro tip, alot better then punching holes in a flat piece of cardboard
Worked out pretty well, especially for longer storage as the valves aren't going back in immediately.
Roller rockers would make a nice upgrade
Really awesome vid!!! Can't wait to teach mine.
Thank you!
Those holes being plugged is probably why the heads on these crack and they run hot. If the coolant was maintained like the oil on this engine I can see why they are like that. Looks like hard tap water was used in the past. I always take a round file to those hole and remove casting flash for better flow.
Fortunately this one wasn't cracked. I was worried though.
Looks like stop leak or just not enough anti freeze mix in the water. Either way good job.
Thanks. Definitely some clean up to do..
For the love of god get a valve spring removal tool. You can damage the valve springs and the valves doing it like you were.
Previous owner used tap water instead of distilled water and an improper ratio of water and antifreeze.
very good
Hi Jeep solid it's been a while.
Your videos are cool and instructional but that is one job I won't venture into doing.lol
If you ever have the chance could you make a video on to change a belt?
Hey, thanks!
Yeah, I need to get a good belt video up, but in middle of the engine right now.
@@JeepSolid
I totally understand ..I can't wait to see the rest of the engine work ..real cool
Have you made a video on removing the O2 sensor???
Haven't covered that yet. Sorry
It may not come off and it's better to get a new one.
Hi, I have a question. I have a jeep wrangler of 1990 when I went to the mountains at a certain height I was turned off because there is no fuel. Can I make a modification to solve that?
Not sure of the mod for that. Sorry
@@JeepSolid that's ok thank you for your time!
sounds like a altitude issue. If your Jeep is carbureted, it just might need adjusting for such driving conditions.
Wheres the spring compressor tool ? Im a fan...
Ah, sorry. I meant to include the link of the one I have. Here ya go: amzn.to/2EKwr36
I'm going to be removing my off the cj7. I think it would be a great idea to have my son help me also. So that way he learns how to do it.
I think it's a great idea to educate the kids at what you're working on. Good knowledge and bonding time with them.
What kind of rims do you have on your 92 this jeep
Not sure what they are, except super wide aluminum ones... Not gonna keep them.
Hopefully the Jeep will be ready in time to get her driver's license.
That timeline sounds about right. 👍
Looks like the PO used tap water instead of distilled in the coolant.
Ah! I didn't think of that.
I love showing my son how to work on vehicles but it usually end with all my tools lost and put in random places lol, hes 3! Way to go getting the woman involved. She will thank you later when she knows more about cars than her hipster boyfriend.
LOL!! That's funny. Yes, I hope she learns a lot, especially so she is never taken advantage of at a repair shop.
Looks like stop leak
The stupid cup of coffee routine is old...
Who's the girl
I recently did a head job on my LB9. My heads were in much worse shape than yours, so I took them to a local shop. They lapped the valves, hot tanked everything, resurfaced the head, put on new seals, and gave it a coat of paint! Not bad for $250!
Very cool. I bet it looked amazing!