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Lurch
Lurch, Aftermarket & Factory Electronics
Category: Car
Satisfied Customers: 21013
Experience:  Ford, Chev Cert, Heavy Line Mech, Mobile Electronics.Sales, Installation & Repair for 30 years.
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Torque and sequence for the lower and upper intake manifolds on a 3.

Customer Question

What is the torque and sequence for the lower and upper intake manifolds on a 3.4 V6
Submitted: 8 years ago.
Category: Car
Expert:  Lurch replied 8 years ago.

UPPER:
Apply thread lock GM P/N 12345382 to the threads of the bolts.
Install the upper intake manifold bolts.
Tighten the bolts to 25 Nm (18 ft. lbs.)
Working from center out

 

 

LOWER:

 

The torque specification is a 2-step process;
Tighten the vertical lower intake manifold bolts (the four middle ones) to 7 Nm (62 lb in). Tighten the diagonal lower intake manifold bolts (two on each end) to 7 Nm (62 lb in). Tighten the vertical lower intake manifold bolts (the four middle ones) to 13 Nm (115 lb in). Tighten the diagonal lower intake manifold bolts (two on each end) to 25 Nm (18 lb ft).

 

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Lurch and 3 other Car Specialists are ready to help you
Expert:  Lurch replied 8 years ago.

Also here is a TSB:

 

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