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Also, what is preferred on the exhaust manifold studs? All but two came out, so I am going to have to drill the remaining two. I can tell by the color that the Porsche Specialists obviously replaced those two with cheap ones, because judging by the pictures of the factory studs, they were Grade 8, while the two that have broken off in the head are NOT Grade 8.
Do people normally drill/tap for plus-sized studs? I can easily get some 10mm x 8mm upsizing studs, but that of course means drilling the head and tapping for 10mm studs. What is the preferred way for this? I am definitely going to use copper nuts for the exhaust manifold, but I also want a stud that isn't going to rust that easy. I have found, on other cars, that coating the completed assembly with teflon wax seems to inhibit rust production for quite a long time. Stainless studs? I don't know...suggestions are welcome.
Should I take the manifold, have it bead blasted, and cerama-coat it?
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'83 944 N/A
'88 Ford F-150 4WD - Does Everything
'99 300M - Daily Driver, headlights just polished!
'85 34' ITASCA MotorHome, built-in blender baby!
'89 Supra - Black - Future 400hp NA sleeper.
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