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    Oil Leaks At Oil Filter Adapter On
    1989-91 GM 4.3L (262 CID) Engines

    General Motors 4.3L (262 CID) engines installed in 1989-91Chevrolet S-10 and GMC S-15 trucks may experience oil leaks at theoil filter adapter.

    Engines in these applications use a remote oil filter assembly that requires an oil filter adapter to be installed at the oil filter mounting area of the cylinder block (see illustration). The original gasket fails to seal properly and may also cause the adapter bolts to lose torque. Simply retorquing the bolts may stop the leak, but will not result in a permanent repair. Replacement of the gasket and adapter is recommended. The revised gasket carries GM Part #10172754 and the adapter GM Part #10172750.

    Position the gasket on the adapter and hold it in place with petroleum jelly. Do not use any type of sealer on the gasket or the adaptor. Each of the remote filter lines is fitted with an O- ring. Be sure to torque the two mounting bolts to 13-18 lbs.ft. and the remote line bolts to 22-29 lbs.ft.

    The AERA Technical Committee
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