10-08-2006, 11:50 PM
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CC Member
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Join Date: Feb 2006
Location: Gore. New Zealand.,
SI
Cobra Make, Engine: DIY Coupe, F/T ,MkIV.
Posts: 808
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And then keep at it! Alloy intake manifolds need to be retorqued on a regular basis due to the expansion / contraction factor's. Alloy heads/blocks compound the problem. While the Ford torque figures are around 30/35 ft lb for the 3/8" bolts and 20/23 ft lb for the 5/16 bolts, most alloy manifold / head manufacturers recommend a lower torque value due to the softer metal and expansion factor. Check with the techline of your manifold/head supplier to be sure.
Jac Mac
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