Thread: 78 camaro z28 stalling

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thanks for all the help!

when i adjust the lifters (with the engine running) on the 2,4,6,8 cyl i can hear the rocker tapping real good on cyl 2,4 but when i adjust the 6,8 you can barely if at all hear the tapping sound. and i loosened it up practally all the way off. i rechecked the compression on that side and there was very little difference. i pulled the push rods to see if they were bent and they looked good. also i noticed that the 2,4 cyl you can really see a difference in the valve spring compressing compared to the 4,8 cyl where they werent really compressing forcefully. also how do i tell which is the exhaust valve and intake valve ? i will try to adjust them the manual way. thanks again!!

All sbc's from front to rear E I I E E I I E.

worn cam lobes or collapsed lifters could cause the valves not to open up all the way..... but wouldn't cause bad compression, bent valves, could cause the valve not to open all the way but at the same time not seal well either.... try a cylinder leakdown test, get an air fitting that screws into your spark plug holes.... bring the cylinder you want to check to TDC, screw in fitting, hook up to compressor, if you hear air coming out the exhaust or intake and you are for sure at TDC, you probably have bent valves, if you hear air at your filler cap, its rings, if you get bubbles at the radiator cap, its a blown headgasket, or less likey, an eaten thru cylinder wall