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.
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HOMESERVICE MANUALSJEEP2008COMMANDER 2WD V6-3.7LREPAIR AND DIAGNOSISMAINTENANCEDRIVE BELTTESTING AND INSPECTION
2008 Jeep Commander 2WD V6-3.7L
Drive Belt: Testing and Inspection
2008 Jeep Commander 2WD V6-3.7LSECTION Testing and Inspection
ACCESSORY DRIVE BELT
When diagnosing serpentine drive belts, small cracks that run across ribbed surface of belt from rib to rib, are considered normal. These are not a reason to replace belt. However, cracks running along a rib (not across) are not normal. Any belt with cracks running along a rib must be replaced. Also replace belt if it has excessive wear, frayed cords or severe glazing.
Refer to SERPENTINE DRIVE BELT DIAGNOSIS CHART for further belt diagnosis.
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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.