CARB TORQUE SPEC

[Fred Hammerle]

Would someone please advise the torque spec for the carb to intake manifold nuts on a '63 327/340. Thanks, Fred

[Les Jacobs]

Re: CARB TORQUE SPEC

Fred The 63 Shop Manual p14-4 indicates 35-45 FT LBs and does not distinguish between cast iron and aluminum manifolds. I believe that is incorrect for the 340hp and I just snugged them down to approximately 5 ft lbs. I think that much more than that will cause either stud failure.

[Fred Hammerle]

CARB TORQUE SPEC

Les, Yes, 35 to 45 ft lbs is much too high. The torque spec for the intake manifold TO THE HEAD is 40 ft. pounds. That would snap the small diam. carb mounting studs for sure. Must be a mis-print. Anyone else have input, although 5 ft. pounds sounds more like it. THANKS, Fred

[Michael H.]

Re: CARB TORQUE SPEC

Fred,

The factory torque spec for carburetor mounting nuts is 14-18 ft lbs. I would shoot for the minimum, or less, and I would be even more comfortible with about 120 inch lbs.

[Fred Hammerle]

Re: CARB TORQUE SPEC

Thank you Michael. Will try 10 to 12 ft. pounds. Fred