JKP
TJ Addict
I think they should all be at the same height. If that is the only one at that height, I would guess burned valve or seat which means the head will have to be pulled.
Something similar to this could be holding the one valve open (down) a bit.So… I’m going to follow thru with the service bulletin, but does this indicate a bad valve seat? Why would the spring present itself higher? If I understand it’s sitting higher that means the valve is not stuck open but closed father than it should be?
I’m sure the answer would present itself with pulling the head but that’s a farther job than I might be willing to get into at this point.
That makes sense. Could the same be true if the valve is too far up? Once the rocker arms were off. You can see the exhaust valve was farther UP than down. If the “seat” is busted or burned, could that happen?
That's me! Glad you found the thread! Thanks for sharing your experience as well!
Wow, just made it through this thread. Lots of good info here. I have the exact sound on my jeep 98 Manual 4.0 with 135K Miles, it started after and oil change and can't seem to get rid of it. Did you ever find the source?
Wow, just made it through this thread. Lots of good info here. I have the exact sound on my jeep 98 Manual 4.0 with 135K Miles, it started after and oil change and can't seem to get rid of it. Did you ever find the source?
Checking in at 2,000+ miles with the new pistons and all is good still. No noise at all and it runs great. Drive it to work every day (short drive to work).
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I'm hoping on board as well... UGH.
I had a blown head gasket and a cracked cylinder head. Repaired it all myself and installed the new cylinder head. I now have a sound I didn't have before... The engine (4.0L) now has a horrible knock/tick that will not go away. It does it cold/hot and seems to increase with the rpms of the engine. When I looked down into the valve cover I swear it looks like its not getting much oil to the top end of my engine. Would lots of sludge clog up an oil pump and cause this tick? I added MMO to the oil and it might have quieted some other noises but this still seems unaffected...
Here is a video I got of it.
Are you sure that's not an exhaust leak? Could be that or a stuck lifter, but that is not the noise in question from this thread.