I'm stumped, any help would be awsome
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Location: Georgia
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Year: 1988
Model: Cherokee
Engine: 4.0L HO from a 91 Comanche.
I'm stumped, any help would be awsome
I have a 88 cherokee, the engine is from a '91 comanchee, I rebuilt it awhile back and put a very mild comp cam in it, and a mega squirt fully sequential (MS3X), I decided to do the intake swap from a '99 and put a bit more aggressive cam in. I had the head resurfaced (the third time, up to .030" shorter than stock) the block is bored to .030" over, and I used a .041" MLS head gasket. I have IAT's that climb very rapidly, as if fire was shooting into the intake. I have a loud clatter as if a lifter on cyl #5 failed, which goes away when the coil (coil near plug) and injector are pulled from that cylinder. The engine runs rough, and backfires like mad if the throttle is moved.
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Year: 1988
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Engine: 4.0L HO from a 91 Comanche.
We are going to double check the TDC damper assumption, and make sure there's no hydraulic lifter preload due to increased compression ratios taken straight off the piston to head clearance.
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Year: 1988
Model: Cherokee
Engine: 4.0L HO from a 91 Comanche.
Some of both, which was my thoughts too, got it completely apart and found the damn gremlin, intake lifter for the #5 cylinder has been destroyed, the cam wore through it until it had a hole in the bottom of it, and the cam lobe is also destroyed, looks like there was lifter seize-up on start up, in spite of my extreme care in installation and prelubrication.
So it'll be another set of lifters, and another cam, $200 cha-ching.
So it'll be another set of lifters, and another cam, $200 cha-ching.
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