Chevrolet Cobalt Service & Repair Manual: Exhaust

Timing Chain, Replace

Caution: With the timing chain removed, avoid turning the camshaft or crankshaft. If movement is required, exercise extreme caution to avoid valve damage caused by piston contact. ...

Catalytic Converter R&R

1. Raise and support vehicle. 2. Remove wheel drive shaft heat shield. 3. Remove Heated Oxygen Sensor (HO2S). ...

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Chevrolet Cobalt Service & Repair Manual. Valve Spring Replace
This procedure is designed to replace valve spring while head is attached to engine. 1. Install a suitable flywheel holding tool in order to prevent crankshaft rotation. 2. Remove applicable spark plug from cylinder ...