Quote:
Originally Posted by wanab5150
We have multiple winners.......I checked all the rockers and they appear fine. I adjusted all the valves with 1/2 turn of preload. I turned the engine over several times with the starter the grabbed each lifter to confirm they were not loose. I found three that were loose with about .020 lash....wtf!
I assumed I did something wrong and loosened all the lock nuts again and started over. Again I cycled the engine and felt for loose rockers.....THERE THEY ARE AGAIN!
This time I rotated the engine and as the exhaust started to close I checked the loose rocker and it was snug??????????????? Then, I rotated the engine a bit and there the slop came back........On 3 rollers, no less!
Off came the intake and I found 3 lifters with slop in the needle bearings. The worst was .026 and the other 2 were about .020 slop. The rest were tight but I used a dial indicator and all were virtually immeasurable.
It made my day to find the bad roller lifters. Now I could use some recommendations on a new set. These have no name on them but have "AC8" on the side. I know nothing about rollers but am going to replace all of them..........Recommendations???
Also, I have a question regarding rebuilding the Roush engine at 15K miles.....Why?
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This time I rotated the engine and as the exhaust
started to close I checked the loose rocker and it was snug???????????????
This is your first mistake, exhaust starting to close would be about 70 ABBC (110 BTDC). At that point, the intake could be on or near to the start of the opening ramp.
Rule of thumb is EOIC, exhaust opening-adjust inlet, inlet closing-adjust exhaust.