Intake Torque Spec

Fred Hammerle · 08-15-04, 04:27 PM

Can someone pls advise the correct intake bolt torque spec for a '64 327/365 with OEM aluminum intake manifold. Thanks, Fred

67HEAVEN · 08-15-04, 05:05 PM

Fred,

The '67 Shop Manual says 30 ft.lb. for all small and big block intake manifolds. This likely applies to '64 as well.

Welcome to CAC.

Fred Hammerle · 08-15-04, 05:27 PM

Thanks for the fast reply and welcome. Fred

studiog · 08-15-04, 09:40 PM

Maybe you've already been down this road before but just in case:
Be sure to use the correct torque sequence too.
You might want to use RTV silicone in place of the front and rear standard issue intake gaskets.

Fred Hammerle · 08-15-04, 09:57 PM

Thanks and yes, I was planning to use black RTV instead of the F and R rubbers, that tend to float around. Do you have the bolt torquing sequence, or can you tell me where to find it. I assume it's center out? I appreciate the help! Fred

08-15-04, 10:10 PM

center out and criss cross is the way most people do it. Question, is that 365 the stock horspower? And what is the redline on such an engine?

John Mcgraw · 08-15-04, 10:26 PM

Fred,

As others have said, the listed torque spec is 30 ft/lbs, but I don't believe that I have ever seen anyone use a torque wrench on these bolts! LOL
There are several that can only be accessed with a crows-foot adapter, and then you have to do the math to convert the torque to the proper value for the crows-foot.
I always just use the old calibrated elbow technique with a box-end wrench. LOL

Regards, John McGraw

JohnZ · 08-16-04, 06:52 PM

Also, use thread sealer (not RTV) on the intake bolts to keep oil from migrating up the threads from the lifter galley and staining the intake around the bolt heads. I like to use thin AN washers (standard I.D., small O.D.) under the intake bolts so they don't chew up the aluminum intake - all the Corvette parts houses have them.

studiog · 08-18-04, 11:09 PM

Quote:

Originally Posted by John Mcgraw

Fred,

As others have said, the listed torque spec is 30 ft/lbs, but I don't believe that I have ever seen anyone use a torque wrench on these bolts! LOL
There are several that can only be accessed with a crows-foot adapter, and then you have to do the math to convert the torque to the proper value for the crows-foot.
I always just use the old calibrated elbow technique with a box-end wrench. LOL

Regards, John McGraw

I agree with John. You might want to use the torque wrench on a few that you can easily access. This will help you recalibrate your elbow for the ones you have to use the box wrench on