Reinstalling stock pushrods and rockers
Yes, I torque all 16 rocker bolts to 22 ft/lbs @ TDC on the 1st cylinder. Then I turn the motor and torque them all again to 22 ft/lbs (basically a torque check..). How does this produce a different result than the one posted above? All of the bolts were torqued at their base circle regardless if it was on the first pass or the second.
^^^^ you are only supposed to tighten the 8 rockers. they wont all be sitting on there base circle at the same time, tightening them and compressing the spring at the same time can be real bad and possibly strip the threads out the head.
I have seen many stripped heads that I have had to drill out and heli-coil because people have tried to tighten the rocker arm bolts against the spring pressure. Follow the GM procedure which puts the lifter on the base circle so it does not compress the spring while you tighten it down and don't listen to LS-1Z28 when it comes to this. Laziness will usually end up costing you a lot in the long run.
Yes, I torque all 16 rocker bolts to 22 ft/lbs @ TDC on the 1st cylinder. Then I turn the motor and torque them all again to 22 ft/lbs (basically a torque check..). How does this produce a different result than the one posted above? All of the bolts were torqued at their base circle regardless if it was on the first pass or the second.
Actually haven't heard of that happening before. A quick search and found a couple threads where people have stripped their rocker threads because of this.. When I was tightening mine I did see the springs compress but I definitely didn't feel nearly enough resistance to strip the threads. In fact, I didn't feel much resistance until the rocker bottomed out on the bracket. Guess you learn something new everyday.
I've installed the rockers twice now and haven't had any trouble but I'll make sure to tighten the rockers down only on their base circle.
Thanks for being persistent. Sometimes I can be kinda stubborn
I've installed the rockers twice now and haven't had any trouble but I'll make sure to tighten the rockers down only on their base circle.
Thanks for being persistent. Sometimes I can be kinda stubborn
LS-1Z28 we learn something new every day no one knows everything we all make mistakes learn from them and move on, people that don't accept their mistake are the ones that never learn and there is a lot of people like that in this industry 
Teching In
Joined: Nov 2008
Posts: 34
Likes: 0
From: ohio
glad i seen this for some reason two of my rockers came loose?? one bolt is streched my stuff should be here tomarrow and was wondering about the adjustment my buddy said on his vette he just top dead center then torqed them to 22ft/lbs...i would of had to beat him ....lol mines a 6.0 with #317 5.3 heads all the same right???
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Verdad Gallardo Actually haven't heard of that happening before. A quick search and found a couple threads where people have stripped their rocker threads because of this.. When I was tightening mine I did see the springs compress but I definitely didn't feel nearly enough resistance to strip the threads. In fact, I didn't feel much resistance until the rocker bottomed out on the bracket. Guess you learn something new everyday.
I've installed the rockers twice now and haven't had any trouble but I'll make sure to tighten the rockers down only on their base circle.
Thanks for being persistent. Sometimes I can be kinda stubborn
I've installed the rockers twice now and haven't had any trouble but I'll make sure to tighten the rockers down only on their base circle.
Thanks for being persistent. Sometimes I can be kinda stubborn
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
Follow the Service Manual procedure posted above.
