10-26-2013, 06:19 PM
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CC Member
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Join Date: Mar 2008
Location: Ocean Isle Beach,
NC
Cobra Make, Engine: Superformance #2769 Roush 427R Dart Block
Posts: 606
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Not Ranked
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?
__________________
Tom
I miss my Tazer 
Last edited by wanab5150; 10-26-2013 at 06:22 PM..
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