Torque specs head bolts to the upper intake manifold?

Tiny
SCOTTSOSA_18
  • MEMBER
  • 2005 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 320,000 MILES
I had a blown head gasket and replaced everything but before I put everything back togeather again I need to know the exact torque specs each set of bolts starting from the head bolts to the upper intake manifold. I keep getting different specs from 22 ft/lbs to 37 ft lbs.
Monday, December 15th, 2025 AT 6:31 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,254 POSTS
Hello,

The cylinder head bolts are torque-to-yield so you will need a new set.

First Pass. 50 Nm (37 ft. Lbs.)
Final Pass. 120 degrees

The intake are:

Tighten the lower intake manifold bolts in sequence
L26 to. 15 Nm (11 ft. Lbs.).

Check out the images (below). Let us know if you need anything else.
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Tuesday, December 16th, 2025 AT 10:28 AM

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