Duramax Fuel/Oil Dilution

December 11th, 2009

We have a 2002 Duramax with over 125,000 miles. Yesterday, we learned the injectors leaked fuel into the engine crankcase oil (the 5 gallon collection container overflowed and I believe 2/3 gallons were collected in a second container).

We have a 2002 Duramax with over 125,000 miles. Yesterday, we learned the injectors leaked fuel into the engine crankcase oil (the 5 gallon collection container overflowed and I believe 2/3 gallons were collected in a second container). Has leaking injectors and fuel in the engine oil been reported/discussed? We were told the repairs are expected to approach $5,000 for parts, labor, and taxes.

Since this is mostly highway mileage, we did NOT expect this type of problem and expense. We would appreciate any information and guidance.

Vic Refre
Via the Internet

General Motors has extended the Duramax 6600 fuel injector warranty coverage for owners of 2001/02 model-year Chevrolet and GMC Duramax 6600 equipped pickup trucks. A copy of Special Policy #04039 was sent to all current registered owners in June of 2004 indicating that additional warranty protection is now available for a period of seven years from the date the vehicle was first placed into service or 200,000 miles – whichever occurs first. Special Policy 04039 applies to all 2001-02 Duramax 6600 equipped vehicles.

Two distinct types of failures are mentioned in the special policy as being included in this extended injector warranty – high fuel return rates due to cracked injector bodies and/or ball seat erosion. Other types of failures are not mentioned, and coverage for any other type of failure under this special policy will be determined by your servicing dealer.

There is a specific fuel return flow test that your dealer tech can perform to measure return fuel flow rates. Always suspect loose/leaking fuel return lines before considering something worse.

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