Chevrolet Cobalt Service & Repair Manual: Engine Tune Up & Performance

Engine Liters/ CID/ Type

SFI/OBD II system. Equipped w/MIL. Engine Liters/ CID/ Type Certif- ication Type Trans. Type ...

Compression Pressures

1. Ensure engine is at room temperature and battery is fully charged. 2. Disconnect wiring from ignition module and remove spark pl ...

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Chevrolet Cobalt Service & Repair Manual. Compression Pressure
When inspecting cylinder compression, the engine should be at room temperature, the throttle should be open, the spark plugs removed and the battery at full charge. The lowest reading cylinder should not be less than 70% of the highest and no cylinder reading should be less th ...