Service Instruction No. 1164 B

Oil Pump Application

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Supersedes Service Instruction No. 1164A

April 12, 2005

MODELS AFFECTED

All Lycoming direct drive engines except engines that incorporate an integral crankcase and accessory housing assembly.

TIME OF COMPLIANCE

When oil pump replacement is necessary.

Replacement parts for the original two-piece oil pump body and cover assembly are no longer available. One-piece oil pump bodies which have been designed to eliminate the possibility of oil leakage between the oil pump body and cover assembly are now installed on all new applicable engines and are the recommended replacement pumps for all applicable engines in service at this time.

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