7DCUDA383A
Well-Known Member
Have these ARP 200-7620 studs , is that it all needs to go into the head , looks short , also have MP valve covers , any loctite.
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Value cover studs
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Xcudame
Well-Known Member
See factory specs below. Looks like just 5/16" goes in the head. So you're good with what you have!
7DCUDA383A
Well-Known Member
It just didn't see long enough in the head part , the only issue I had were the 2 lower holes had too much of an angle so I used regular bolts , I did not use loctite , not sure what torque specs are so I just hand tighten them .
Xcudame
Well-Known Member
I use two nuts to install the studs. Tighten the nuts together with two 7/16" wrenches. Then install the stud with the smallest 7/16" wrench you have. Loctite would be best. In fact this is the perfect application for red Loctite. You want to tighten the studs tighter than you will tighten the nuts so they don't back out later.
7DCUDA383A
Well-Known Member
I didn't think about the double nut but they are in all the way and no loctite , it's seems good but you never know with these cars , im gonna see how it goes .
gzig5
Well-Known Member
Rule of thumb is that the length of a threaded fastener going into the hole should be at least the diameter or the thread. Going longer isn't bad and adds strength but in many cases isn't required. So a 5/16-18 bolt should go into a hole that has at least 5/16" of thread depth, to achieve full strength. There is hardly any load on the valve cover bolts/studs. They have a cork or silicone gaskets in compression and unless there is a hard stop designed into the cover, the only tension the bolts will be under is that provided by the gasket. Head would be a different application under a lot more stress, and you want about double diameter thread engagement or maybe more going into aluminum.
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