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.
2008 Hummer H3 L5-3.7LFACTORY OEM SERVICE PROCEDURE
Thread Repair Specifications
Thread Repair Specifications
Engine Block - Top View
Engine Block - Top View:
Engine Block - Bottom View
Engine Block - Bottom View:
Engine Block - Left Side View
Engine Block - Left Side View:
Engine Block - Right Side View
Engine Block - Right Side View:
Engine Block - Front View
Engine Block - Front View:
Engine Block - Rear View
Engine Block - Rear View:
Cylinder Head - Top View
Cylinder Head - Top View:
Cylinder Head - End - Front View
Cylinder Head - End - Rear View
Cylinder Head - End - Rear View:
Cylinder Head - Intake Manifold Deck View
Cylinder Head - Intake Manifold Deck View:
Cylinder Head - Exhaust Manifold Deck View
Cylinder Head - Exhaust Manifold Deck View:
Oil Pan - Bottom View
Oil Pan - Bottom View:
Oil Pan - Rear View
Oil Pan - Rear View:
Engine Front Cover
Engine Front Cover:
Crankshaft Rear Oil Seal Housing
Crankshaft Rear Oil Seal Housing:
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.