Re-torquing heads
09-10-2018, 04:55 PM
#1
Re-torquing heads
Lots of boosted stuff now adays on here or everywhere for most part, ive always heard and in most engine builders instructions say after a little bit or couple heat cycles you should retorque cyl heads again. I know why and get the reasoning.
but im mainly curious how many of you actually do it on ls stuff?? Stock 4bolt stuff seems to have a limit and pushes water and when that happens stuff needs to come apart anyways.
opinions, thoughts?
but im mainly curious how many of you actually do it on ls stuff?? Stock 4bolt stuff seems to have a limit and pushes water and when that happens stuff needs to come apart anyways.
opinions, thoughts?
09-12-2018, 12:52 AM
#3
TECH Regular
I'm in the same boat as Kyle. I am working on trying to find the limits of the Ls9 gaskets next spring with TFS 220 as cast heads. But I have had them up to 20# and not pushed any water yet, and I expect it to take closer to 30# to push them out. I have also pulled the heads twice and I have never double checked the torque on the head studs. Snug and go.
09-12-2018, 07:39 AM
#5
Definitely check the header to head bolts. I could hear an exhaust leak on mine after about 8K miles on the turbo kit. The back 3 bolts on the driver's side header had backed out. If you are removing the header you should replace the bolts. I've had to extract broken exhaust manifold bolts on countless LS motors. Always seems to be the last bolts at the front end and back end of the manifold.
09-12-2018, 10:16 AM
#6
I'm in the same boat as Kyle. I am working on trying to find the limits of the Ls9 gaskets next spring with TFS 220 as cast heads. But I have had them up to 20# and not pushed any water yet, and I expect it to take closer to 30# to push them out. I have also pulled the heads twice and I have never double checked the torque on the head studs. Snug and go.
my thoughts at least.
I figured most didnt but thought id ask
09-12-2018, 01:41 PM
#7
If you do it, you cant just go in with a wrench and hit em. 1 by 1 you have to back them off to free spin and re-apply the torque + w/e value you feel adequate.
Re-torquing the heads was a thing for us in the Saturn would of things, but we didnt have fancy MLS gaskets or 6bolts per cylinder to help us hold them together.
Re-torquing the heads was a thing for us in the Saturn would of things, but we didnt have fancy MLS gaskets or 6bolts per cylinder to help us hold them together.
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