- Thread starter
- #126
1SIC1Gb
10+ Year Contributor
- 353
- 73
- Jun 25, 2012
-
Houston,
Texas
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Typically with a copper gasket, you need to re torque it 3 times before first start. We usually do it every hour after the head as been installed. The first 3-5 heat cycles it will be needed as well. After that you should be good.Not sure yet, but this copper headgasket is a real pain. Keep having to retorque it . But it should be easily enough to go 9s. Welded center diff, and it spins all 4 from a 55 roll on my street wheels.
When you retorque it , you break each one individually, starting with the center and torque it back to final torque? Or how do yall do it?Typically with a copper gasket, you need to re torque it 3 times before first start. We usually do it every hour after the head as been installed. The first 3-5 heat cycles it will be needed as well. After that you should be good.
For retorque, you'll want to loosen the nut and retorque back to your spec, one stud at a time. I also re-lube the nut each time. Start in the middle and follow the factory torque sequence.When you retorque it , you break each one individually, starting with the center and torque it back to final torque? Or how do yall do it?
Agreed. 12mm l19 or 625 studs are plenty. With the 12mm tool steel studs the issues aren't clamping force and bolt stretch. It's the span of aluminum between studs flexing.Ditch the 1/2" studs.
It sure would make things less complicated .. But I can torque the 1/2" studs to 115ft/lbs which also helps with lifting and flex.
One of the big things too is the steel head inserts which I already have . I'm going to talk it over with my machinist . He has some new inserts for the studs that are much smaller (leaving more meat around the block to prevent this)