Rockers are pro comp shaft mounted 1.52 sef allighning today i crank the car up i hear the slapping sound stud snapped. I pull the cover off and the polylock with half the stud coms off what could have caused this.. I have 2 sets of heads trying to take off the stud how do you get those things off

 

well everything is back on hopefully things should go well

 

Since the steel rockers polylocks are to tall im using the aluminumr rocker polylocks in there place they should be fine right...because they are shorter...

 

ttt

 

Is it possible that you had the pre-load cranked down way to tight and it somehow put all the extra stress on the stud and broke it? I would think this would collapse a lifter first but if your running a solid roller or something ? Who knows ?

Also, it SHOULDNT hurt it running aluminum poly locks ... I would check with someone who has more experiences building engiens first though ...

 

Yea I have lt1 97 thats what I thought also I put a new stud fro the other lt1 heads i have and barely tightened the polylock and tightened the hex screw. Lucky I cranked the car up and heard it knocking a little then it changed exhaust tone and started to slap louder pulled the cover pulled the stud out and replaced it... lucky