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intake manifold torque with alum heads?

Posted By: rickmoore69

intake manifold torque with alum heads? - 07/11/09 05:49 PM

What should the torque be for intake manifold bolts with aluminum heads?
Posted By: therocks

Re: intake manifold torque with alum heads? - 07/11/09 07:51 PM

I dont torque mine but about 25 ft lbs.Rocky
Posted By: RapidRobert

Re: intake manifold torque with alum heads? - 07/11/09 08:05 PM

The torque spec is about getting the proper amt of stretch of the fastener and how much clamping force the gasket needs(for it's type & what it has to contain) assuming the alum threads can hold that amount & yes they can so keep the torque the same(I believe 35)
Posted By: rickmoore69

Re: intake manifold torque with alum heads? - 07/11/09 09:37 PM

Thanks for the input guys, I forgot to mention this is a 440 w/ a street dominator intake and stealth heads.
Posted By: therocks

Re: intake manifold torque with alum heads? - 07/11/09 11:07 PM

After 40 years I never torque them and Ive installed hundred.Never had a leak.The factory spec is for cast iron not aluminum.Its not needed to 35.Its a non moving part.Rocky
Posted By: Challenger 1

Re: intake manifold torque with alum heads? - 07/12/09 02:55 AM

Quote:

I dont torque mine but about 25 ft lbs.Rocky




Posted By: Exit1965

Re: intake manifold torque with alum heads? - 07/12/09 12:31 PM

I also used 25 lbs, may have gotten it directly from an Edelbrock instruction sheet.
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