Valve Cover and Air Filter Color

[Brett Johnson]

The earliest engines had engines with black valve covers and black Knecht mushroom air filters. Before March 1952, they are first painted silver. Does anyone have more definitive information? How about type 502 engines -- mesh air filters? The first 527s have them.

[Joe Ruiz]

The earliest engines had engines with black valve covers and black Knecht mushroom air filters. Before March 1952, they are first painted silver. Does anyone have more definitive information? How about type 502 engines -- mesh air filters? The first 527s have them.

Brett, I'm reading your quote above and you say that "Before March 1952, they are first painted silver". I've been building these engines for over 40 years now and pretty confident that type 369, 506 and 527 had black valve covers and air cleaners.

Note also that along with the different "types", the crankshaft, generator pulleys and their exhaust systems had different coatings/finishes.

In order: type type 528/1500cc S, type 546/1500cc N, type 527/1500cc, type 369/1100cc