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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1247 (ENGINE EXHAUST SYSTEM)SPECIFICATIONSFASTENER TIGHTENING SPECIFICATIONS
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Fastener Tightening Specifications
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Fastener Tightening Specifications
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Catalytic Converter-to-Exhaust Manifold Bolt/Nut - LZ4 | 31 N.m | 23 lb ft |
| Exhaust Manifold Bolt - LZ4 | 20 N.m | 15 lb ft |
| Exhaust Manifold Brace Bolt - L61 | 25 N.m | 18 lb ft |
| Exhaust Manifold Heat Shield Bolt - L61 | 23 N.m | 17 lb ft |
| Exhaust Manifold Heat Shield Bolt - LZ4 | 10 N.m | 89 lb in |
| Exhaust Manifold Nut - L61 | 14 N.m | 124 lb in |
| Exhaust Manifold Pipe-to-Muffler Nut - L61 | 30 N.m | 22 lb ft |
| Exhaust Manifold Pipe Nut - L61 | 35 N.m | 26 lb ft |
| Exhaust Pipe Heat Shield Nut | 10 N.m | 89 lb in |
| Heater Oxygen Sensor | 42 N.m | 31 lb ft |
| Heat Shield Nut | 10 N.m | 89 lb in |
| Left Catalytic Converter-to-Exhaust Manifold Nut - LZ4 | 31 N.m | 23 lb ft |
| Left Catalytic Converter-to-Right Catalytic Converter Nut - LZ4 | 31 N.m | 23 lb ft |
| Rear Catalytic Converter-to-Muffler Nut | 30 N.m | 22 lb ft |
RENDER: 1.0x
NO RELATED
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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.