Diagnosing the No. 8 Cylinder Problem

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Diagnosing the No. 8 Cylinder Problem:

Symptoms:

Tiny black specks of carbon in your coolant reservoir.
White smoke
Engine missing/running rough
Water from the exhaust pipe
Heater not working
Engine running at 160 instead of 200
Low coolant light

If you can, do a pressure test over night. If you have a leak, this will probably lock the engine.

I attended a HUMMER Club event last month and had a long talk with both HUMMER techs from AMG (both have been working on HUMMERs since 1992). There is a vin number that anything after is "safe".

The #8 cylinder problem starts with late 1996 models. It turns out that the concern ends in 2000.

Any Vin Numbers after this number are NOT at Risk:

VIN # 137ZA9037YE188469

Dan L.

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