Quote:
Originally Posted by Stephen12ZL1
I wouldn't go past the yield strength of the bolt. Is your gasket o.k. in that location? That fitting area shouldn't require a huge amount of torque if the embossed gasket seal is in good condition. Be careful!
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The O-rings are new, and the bolts are grade 12.9, so they'll hold; I'm only worried about the threads of the hole. It's currently at 16 lb.ft of torque with little leak. I'll try 21 lb.ft for sure, but İ wonder if I should try 25 lb.ft right away (which looks safe for 3/8-16, assuming helicoil is as strong as a grade 8 SAE bolt). For every trial, I have to loosen the header and remove the exhaust clamps, or else I don't have clearance for the torque wrench. It's very annoying.