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First check the plenum for warping by using a straight edge across the intake ports and a feeler. If warpage exceeds .100, replace the plenum.
If not warped beyond specification, replace gaskets and torque in two steps, 1st step 44 inch pounds, 2nd step 89 inch pounds using the pattern shown:
10 4 1 5 8
FRT
7 6 2 3 9
In case this does not format correctly try this:
From front of engine, start with 3rd bolt on left, then go to 3rd bolt on right, next 4th bolt on right, next 2nd bolt on left, next 4th bolt on left, then 2nd bolt on right, then 1st bolt on right, then 5th bolt on left, then 5th bolt on right and finally, 1st bolt on left.
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