Manifold Stud torque

[NateZ]

Mercruiser 7.4.

Just bought all new manifolds, risers, and spacers for both motors. They had hex head bolts, 4 of the heads snapped off coming off, so im not going to reuse them, seems silly to reuse old manifold bolts anyways.

The new manifolds came with studs however, I know the torque on the nut would be 30 ft lbs, but what are you supposed to torque the stud to in the cylinder head?

Should i just toss the studs and go with all new stainless head head bolts?

Nate

 

[boat127]

Re: Manifold Stud torque

never use stainless. i put the studs in with some avaition sealant on the threads and thread in the studs in by hand til the threads run out then turn a 1/4 turn with 2 nuts turned against each other then jsut torque the nuts with proper torque once manifold is installed.

 

[NateZ]

Re: Manifold Stud torque

What brand of sealant do you use? (I happen to be an aircraft tech)

What kind of bolts are appropriate if not stainless?

Nate

 

[Bt Doctur]

Re: Manifold Stud torque

steel Grade 5 , Permatex Aviation liquid

 

[NateZ]

Re: Manifold Stud torque

How much more superior is the permatex to using anti seize?