Exhaust manifold studs installment

Navajo350 · Jul 1, 2015

What is the best way to install exhaust manifold studs?

Do you torque them down until tight or on and off with the manifold so you know when the nuts are flush?

Thanks
Robert

MarkB_MI · Jul 1, 2015

Double nut them and tighten them down with the manifold off until they bottom out. Use the torque wrench once you've installed the manifold to tighten the nuts to spec.

Navajo350 · Jul 1, 2015

(quoted from post at 13:59:57 07/01/15) Double nut them and tighten them down with the manifold off until they bottom out. Use the torque wrench once you've installed the manifold to tighten the nuts to spec.

Ok, thanks. That will work for the 2 center studs, but the outer 2 can't bottom out...

MarkB_MI · Jul 1, 2015

>the outer 2 can't bottom out...

Better use Loctite, then.

Brian G. NY · Jul 2, 2015

Stud holes on some tractors open into the water jacket.....those need something like Permatex #2 to seal the threads.

mj · Jul 2, 2015

(quoted from post at 06:47:25 07/02/15)
Stud holes on some tractors open into the water jacket.....those need something like Permatex #2 to seal the threads.

Yeh - I still use #2 after many years. I have better luck with it than anything else I've tried ....... including silicone concoctions

jimg.allentown · Jul 2, 2015

From an engineering standpoint, you (theoretically) get the maximum strength from a depth equal to the major diameter of the thread. So, for a 3/8-16 thread, it would need to be a minimum of 6 full turns into the head. More is fine, but 6 is enough for it (hopefully) not to pull out. However, this also assumes the condition of the threads is pristine - undamaged and not corroded.

Exhaust manifold studs installment

Navajo350

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MarkB_MI

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Navajo350

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MarkB_MI

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Brian G. NY

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mj

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jimg.allentown

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