Audi A4 Engine >> CRANKSHAFT SEAL LEAKS

Audi A4 Engine >> CRANKSHAFT SEAL LEAKS

Rear Main Crankshaft Seal Leak On
Audi 2.0L, 2.2L, 2.3L Engines

AERA member shops have reported rear main oil seal leaks on the 2.0L, 2.2L, and 2.3L engines. The engines are used in the Audi 80/90 and 100/200 cars.

To verify that the engine oil leak is coming from the rear main seal, and not from the engine's valve cover, use florescent dye in the engine oil and a black light.

Audi has released an improved crankshaft seal, part number 068-103-051G to help correct this problem. The new seal went into production after VIN # 44 LN026115 for the 100/200 models, and after VIN # 8A LA048000 for the 80/90 models.

Audi also advises using locking compound on the flywheel bolts to seal the crankcase. The torque for the non-shoulder bolt is 55 lbs. ft. The torque for the shouldered bolt is 74 lbs. ft. and Audi advises to always use new shouldered bolts.
The AERA Technical Committee

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