2007 Pontiac G6 Compression Testing

2007 PONTIAC G6
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DONNYRAY49
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Inline 4 engine Cylinders 1,2 and 4 are near normal. Cylinder #3 is 30% below normal in both wet and dry testing. Possible causes?
Jan 7, 2015 at 10:21 AM
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JACOBANDNICKOLAS
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How many miles are on the engine? Have you done a wet compression test? Have you done a leak down test on that cylinder. Is there any coolant and oil mixing? Is there excessive white smoke from the exhaust?
Jan 7, 2015 at 10:44 AM