Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Hummer H3 L5-3.5LFACTORY OEM SERVICE PROCEDURE
Timing Components: Specifications
Timing Chain Tensioner Bolt 25 Nm (18 ft. lbs.)
Timing Chain Tensioner Guide Bolt 18 Nm (13 ft. lbs.)
Timing Chain Tensioner Shoe Bolt 25 Nm (18 ft. lbs.)
Engine Front Cover Bolt 10 Nm (89 inch lbs.)
Engine Front Cover - Center - Small Bolt 8 Nm (71 inch lbs.)
Engine Front Cover Spacer Bolt 10 Nm (89 inch lbs.)
Crankshaft Balancer Bolt
First Pass 150 Nm (110 ft. lbs.)
Final Pass 180 degrees
Timing Chain Tensioner Guide Bolt 18 Nm (13 ft. lbs.)
Timing Chain Tensioner Shoe Bolt 25 Nm (18 ft. lbs.)
Engine Front Cover Bolt 10 Nm (89 inch lbs.)
Engine Front Cover - Center - Small Bolt 8 Nm (71 inch lbs.)
Engine Front Cover Spacer Bolt 10 Nm (89 inch lbs.)
Crankshaft Balancer Bolt
First Pass 150 Nm (110 ft. lbs.)
Final Pass 180 degrees
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.