Revised Front Cover Crankshaft Oil Seal for GM 2.2L Ecotec Engines - Engine Builder Magazine

Revised Front Cover Crankshaft Oil Seal for GM 2.2L Ecotec Engines

Affected engines: 2002-2005 GM 2.2L Ecotec Four-Cylinder Engine (VINs D, F – RPO L61)


Some customers may comment on an oil leak from the front engine cover crankshaft oil seal during extremely cold weather.


During extremely cold weather, moisture at the engine crankshaft balancer may freeze to the crankshaft front oil seal, which may result in the oil seal being torn when the engine is started.


Replace front crankshaft oil seal with a new service part, p/n 12564041, which is constructed of an improved sealing compound that is not susceptible to freezing. Refer to the service procedure in this bulletin to replace the front crankshaft oil seal.


1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement in the appropriate Service Manual.

2. Use a flat-bladed tool to remove the front crankshaft oil seal from the engine front cover. Discard the old front crankshaft oil seal.


1. Use the front crankshaft seal installer tool J 35268-A to install the new crankshaft front oil seal, p/n 12584041, to the engine front cover.

2. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement in the appropriate Service Manual.

Some or all of this information was provided by the Automotive
Parts Remanufacturers Association (APRA). For more information on
technical bulletins available through APRA call 703-968-2772 or visit

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