Scrap it? 4.0L head gasket replacement is totally doable for a person with average skills in his or her garage. Cats can be done too. For under $500 in parts both jobs can be completed twi weekends (if you really take your time). The way people so easily throw things away these days blows my mind. $500 and personal time is a lot cheaper than spending $10k-25k on a “new to you” used Jeep that may or may not have the same problem in a few thousand miles.

Thanks for the vid! 👍🏻

I have old oil residue in the same area on the block. But no signs of head gasket failure. What did your leak end up being?

Why do the replacement head gaskets 2001 4.0 do not have all the waterports ?

Squeeze the upper radiator hose when the engine is up to temp after driving, if it is very very stiff and possibly slightly ballooned, your up around 15 psi, mist caps as you probably know pop at 16 PSI to relieve the excess pressure, in your case if it's that bad you will completely fill your coolant bottle and blow out its vent then when it cools down it pulls it back from the tank, I've seen it lots on 6.0 fords and cummins diesels and the coolant bottle or overflowing when hit and say towing. In there case they have a degas tank, and the coolant gets pushed past the cap, duramax diesels and fords, as well as dodge after 13, seems to bet the better way to go, rather than the overflow tank.

IIRC... at least on my Dodge Durango, a couple years ago I had the head gasket go bad and the a/c and heating smelled like sweet / burned coolant. It was blowing very little white smoke out the tail end, hardly noticeable. When mechanic took everything apart, found the head had overheated and warped, enough to send it to a local shop to be milled. Looked brand new when they got it back, installed, new head gasket and water pump... runs like a champ. Wish I could say the same for the swapped front diff. Still makes a lot of noise, I replaced the driver's side wheel bearing too. Should replace the passenger side wheel bearing soon, but haven't had the time or money. Not putting a lot of miles on it these days. Getting some suspension work done on it soon, minor, probably new front tires too. Going to have my mechanic replace both valve cover gaskets too, they're slow-leaking the past couple months. It's bled me to death the past couple years $$$ guess I just have an attachment to the old work-horse. Damn good in snow that's for sure. And generally been pretty solid and reliable over the years.

Hello Jerry what happened to the old Chevy you were rebuilding

Hey man... what happened to your live show last Friday 10-19... says was deleted. Awesome vid as usual.... Laters from Montana.

When you got it hot when you had the turbo on could you have warped the head or burned out the gasket?

I'm confused.. head gasket isnt cheap?..I've check how much they go for on ebay they are less than $50 am I looking at the wrong gasket?

Or go to junkyard and if in luck find another engine that has been tested and in good operating condition.

Today at over $100 an hour labour ya sometimes it's just a money pit fixing it.

A headgasket on a 4.0 is literally one of the cheapest and easiest replacements you can do for a HG