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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29520
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Head bolt torque and sequence for a 5.

Resolved Question:

head bolt torque and sequence for a 5.3 chevy suburban 03 model
Submitted: 6 years ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 6 years ago.
Hello, I'm Cam. Please include all the details about your issue so I can accurately advise you. I cannot see your vehicle so please be detailed.
The pattern on a head is always the same, starting the center and working out to each side on the large bolts.
As for torque, here it is.

18 lb ft

Cylinder Head Bolts - First Pass all M11 Bolts in Sequence

30 N·m

22 lb ft

Cylinder Head Bolts - Second Pass all M11 Bolts in Sequence

90 degrees

Cylinder Head Bolts - Final Pass all M11 Bolts in Sequence - Excluding the Medium Length Bolts at the Front and Rear of Each Cylinder

90 degrees

Cylinder Head Bolts - Final Pass M11 Medium Length Bolts at the Front and Rear of Each Cylinder Head in Sequence

50 degrees

and the small ones at the end,

Cylinder Head Bolts - M8 Inner Bolts in Sequence

30 N·m

22 lb ft

Customer: replied 6 years ago.
i'm installing the head on my vehicle and need a sequence ,do you go to the front or back of the head first when you tighten the bolts or does it matter
Expert:  GM Tech (Cam) replied 6 years ago.
Center out,
graphic
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