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 17 (ENGINE CONTROL SYSTEM - SERVICE & ADJUSTMENT SPECIFICATIONS)MECHANICAL CHECKSENGINE COMPRESSION
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Engine Compression
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Engine Compression
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
This engine is equipped with an aluminum cylinder head. Allow the engine to cool before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.
Check engine compression with engine at room operating temperature, all spark plugs removed and throttle wide open.
ENGINE COMPRESSION SPECIFICATIONS
| Application | Specification - psi (kPa) | ||
|---|---|---|---|
| Normal Compression Pressure | (1) 218 (1500) | ||
| Minimum Compression Pressure | (1) 145 (1000) | ||
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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.