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 DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEMSPECIFICATIONSFASTENER 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
| Application | Specification | |
|---|---|---|
| Metric | English | |
| Air Cleaner Outlet Duct Clamp Screw (4.8L, 5.3L, and 6.0L) | 7 N.m | 62 lb in |
| Air Cleaner Outlet Duct Wingnut (4.3L) | 3 N.m | 27 lb in |
| Bypass Pipe to Water Pump Bolt (6.6L) | 21 N.m | 16 lb ft |
| Charged Air Cooler Duct Clamp (6.6L) | 8 N.m | 71 lb in |
| Coolant Air Bleed Pipe Stud/Bolt (4.8L, 5.3L, and 6.0L ) | 12 N.m | 106 lb in |
| Coolant Heater (4.8L, 5.3L, 6.0L) | 50 N.m | 37 lb ft |
| Coolant Heater Bolt (4.3L ) | 2 N.m | 18 lb in |
| Coolant Heater Bolt (6.6L ) | 2 N.m | 18 lb in |
| Coolant Heater Cord Bolt | 8 N.m | 71 lb in |
| Coolant Outlet Pipe Clip Bolt (6.6L) | 9 N.m | 80 lb in |
| Coolant Recovery Reservoir Bolt | 11 N.m | 97 lb in |
| Drive Belt Tensioner Bolt | 50 N.m | 37 lb ft |
| Engine Block Coolant Drain Plug (4.3L ) | 20 N.m | 15 lb ft |
| Engine Coolant Heater Cord Bracket Bolt | 12 N.m | 106 lb in |
| Engine Coolant Heater Cord Clip Bolt | 12 N.m | 106 lb in |
| Engine Coolant Temperature Sensor | 20 N.m | 15 lb ft |
| Exhaust Gas Recirculation (EGR) Coolant Pipe Bole (6.6L) | 21 N.m | 16 lb ft |
| Fan and Clutch Retaining Nut to Water Pump Pulley (4.3L) | 57 N.m | 42 lb in |
| Fan and Water Pump Pulley Bolt (4.3L) | 25 N.m | 18 lb ft |
| Fan Clutch Bolt (4.8L, 5.3L and 6.0L) | 23 N.m | 17 lb ft |
| Fan Clutch Nut (4.8L, 5.3L and 6.0L) | 56 N.m | 41 lb ft |
| Fan Clutch Retaining Bolts (4.3L) | 33 N.m | 24 lb ft |
| Fan Pulley Bolt/Nut (6.6L) | 46 N.m | 34 lb ft |
| Fan Shroud Bolt | 9 N.m | 80 lb in |
| Fuel Line to Fuel Injection Control Module Bolt (6.6L) | 35 N.m | 26 lb ft |
| Heater Inlet Pipe to Fuel Filter Bolt (6.6L) | 21 N.m | 16 lb ft |
| Heater Inlet Pipe to Thermostat Bolt (6.6L) | 21 N.m | 16 lb ft |
| Heater Outlet Hose Bracket Bolt (6.6L) | 21 N.m | 16 lb ft |
| Oil Cooler Hose Adapter Bolt (4.8L, 5.3L and 6.0L) | 12 N.m | 106 lb in |
| Oil Cooler Hose Bracket Bolt (4.8L, 5.3L and 6.0L) | 25 N.m | 18 lb ft |
| Oil Cooler Line Clip to Bracket Nut (4.3L) | 12 N.m | 106 lb in |
| Oil Cooler Line Fittings to the Oil Filter Base (4.3L) | 17 N.m | 13 lb ft |
| Oil Cooler Line Fittings to the Oil Filter Base (4.3L Auxiliary Oil Cooler) | 35 N.m | 26 lb ft |
| Oil Cooler Line Fittings to the Radiator (4.3L) | 24 N.m | 18 lb ft |
| Oil Level Indicator Tube and Transmission Fluid Fill Tube Lower Support Bolt (4.3L) | 4 N.m | 44 lb in |
| Radiator Bolt | 25 N.m | 18 lb ft |
| Surge Tank Bolt/Nut | 9 N.m | 80 lb in |
| Thermostat Housing Bolt (4.3L) | 25 N.m | 18 lb ft |
| Thermostat Housing Bolt (4.8L, 5.3L, and 6.0L) | 15 N.m | 11 lb ft |
| Thermostat Housing Cover Bolt (6.6L) | 21 N.m | 16 lb ft |
| Thermostat Housing Crossover Bolt (6.0L) | 21 N.m | 16 lb ft |
| Transmission Control Module (TCM) Cover Bolt | 9 N.m | 80 lb in |
| Transmission Control Module (TCM) Electrical Connector Bolt | 8 N.m | 71 lb in |
| Turbocharger Coolant Bypass Valve (6.6L) | 60 N.m | 44 lb ft |
| Turbocharger Coolant Feed Pipe Bracket Bolt (6.6L) | 21 N.m | 16 lb ft |
| Turbocharger Coolant Feed Pipe Nut (6.6L) | 9 N.m | 80 lb in |
| Turbocharger Coolant Inlet Banjo Bolt (6.6L) | 25 N.m | 18 lb ft |
| Turbocharger Coolant Outlet Pipe Bolt/Nut (6.6L) | 9 N.m | 80 lb in |
| Water Outlet Stud (4.3L Engine) | 25 N.m | 18 lb ft |
| Water Outlet Tube Bolt (6.6L) | 21 N.m | 16 lb ft |
| Water Pump Bolt (4.3L ) | 45 N.m | 33 lb ft |
| Water Pump Bolt (6.6L ) | 21 N.m | 16 lb ft |
| Water Pump Bolt (4.8L, 5.3L, and 6.0L) | ||
|
15 N.m | 11 lb ft |
|
30 N.m | 22 lb ft |
| Water Pump Inlet Pipe Bolt (6.6L) | 21 N.m | 16 lb ft |
| Wiring Harness Bracket to Thermostat Housing Bolt (6.6L) | 8 N.m | 71 lb in |
RENDER: 1.0x
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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.