When no other apparent cause of crankcase dilution exists, examine for fuel leaking past the R1508R fuel filter head-to-block gasket.

A recent detail change was made in the R1508R fuel filter head gasket to provide a better seal, but regardless of whether the old or new style gasket is used, a thin film of Permatex applied to the surfaces should very well take care of leaking at this point.

June 1960