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Engine Notes

7973 MODELS W/4M - CAMSHAFT LUBRICATION CHANGE  - Engines produced from December 1972 use an oil lubrication tube to lubricate camshaft and rocker arms rather than an oil feed method previously used.

1973 MODELS W/4M - ROCKER ARM CHANGE  - Engines produced from February 1973 have an oil hole drilled in top of rocker arm to increase oil flow to valve stem end of rocker arm.

1973 MODELS W/4M - CRANKSHAFT REAR OIL SEAL CHANGE  - Engines produced from January 1973 have threaded rear oil seal replacing the original seal used. This new seal helps prevent oil leakage in this area. New seal is interchangeable with old seal.

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