tragiccomic1972
NAXJA Forum User
- Location
- Snow Camp NC
Ok... maybe I am going into some type of early senility here and I am missing something obvious.
1997 Cherokee 4.0-- Blown Head gasket... It was drivable, ran decent, just had low compression in # 1 and # 2 cylinders... I have seen this before... head gasket is allowing compression to escape into the adjacent cylinder... no problem... a trip to O'Reilly and 3 hours later.. viola!!! new head gasket installed... I've done no less that 10 of these on 4.0's... simple stuff...
...but I noticed as I was re-installing the rocker arms, that both valves were being compressed when tightening down the stock non-adjustable rockers... that's not supposed to happen... so I turned it over with the starter and sure enough it spun freely as if there was no compression...
I backed the rocker off a bit and it started up, but ran rough because the valves are not adjusted correctly... I checked all the pushrods to make sure they are sitting in the lifter seat...
I am baffled.... why would I have to adjust a non adjustable valve train??
Thoughts?
1997 Cherokee 4.0-- Blown Head gasket... It was drivable, ran decent, just had low compression in # 1 and # 2 cylinders... I have seen this before... head gasket is allowing compression to escape into the adjacent cylinder... no problem... a trip to O'Reilly and 3 hours later.. viola!!! new head gasket installed... I've done no less that 10 of these on 4.0's... simple stuff...
...but I noticed as I was re-installing the rocker arms, that both valves were being compressed when tightening down the stock non-adjustable rockers... that's not supposed to happen... so I turned it over with the starter and sure enough it spun freely as if there was no compression...
I backed the rocker off a bit and it started up, but ran rough because the valves are not adjusted correctly... I checked all the pushrods to make sure they are sitting in the lifter seat...
I am baffled.... why would I have to adjust a non adjustable valve train??
Thoughts?