For 1990-2009 cars

Inspection | Action
--- | ---
DEFINITION: Excessive white smoke and/or coolant type odor coming from the exhaust pipe may indicate coolant in the combustion chamber. Low coolant levels, an inoperative cooling fan, or a faulty thermostat may lead to an "over temperature" condition which may cause engine component damage.
Preliminary Inspection | Verify that there are no external coolant leaks. Refer to Loss of Coolant.
Isolate Affected Cylinders |

1. Cylinder balance test with scan tool
2. Cooling system pressurization
3. Compression test

EGR System Inspection |

1. Inspect EGR valve and intake system for evidence of coolant leakage.
2. Replace the EGR cooler if any problem is found.

Cylinder Head Gasket Leakage | Remove cylinder heads of the affected cylinder bank and inspect for damage. Replace components as necessary.
Cylinder Head or Engine Block Damage |

1. Inspect the cylinder heads for cracks.
2. Inspect the cylinder block for damage.
3. Inspect the cylinder block to head mating surface for straightness.
4. Replace components as necessary.