Model B Motor Serial # Question

[Ratatat]

I have an overhead valve Crager head on the model B motor in my 1930 roadster. The serial number of the motor starts with the Star then the letter and number R4-.....M, then 5 numbers and ends with the letter M. I can't find any reference for B motors on any sites with that beginning letter number configuration. Is anyone here familiar with that configuration?
Thanks

[ursus]

I have seen a number of blocks with that configuration (or with RF-....), all from Northern California. Some have suggested that these blocks originated from the Richmond, CA Ford plant as replacement engines, some time in the 1930's and early 1940's.

[CWPASADENA]

It may be a diamond block, these were replacement engines supplied by Ford in the late 30's and also used as industrial engines.


The original "B" engines that went into 32 -34 Fords were not stamped with a serial number like the Model A engines. The B engine had the serial number on the top of the flywheel housing.


Chris w.

[vernon]

I have a B engine with out any numbers .

[john charlton]

The B engines built at Fords Dagenham England plant had the serial stamped on the block pad .British law required the engine itself to be stamped .

John in Suffolk County England .

[JKY]

Sponsored Links (Register now to hide all advertisements)

My B engine has no number on the side like the A engines do.

[Vicky]

I think Model B Serial Numbers were on the Bell Housing.

If the markings on the block have Three numbers after the letters R & M, like ” R 010” and “M 020”; it is probably an engine rebuilders marking for the Rods (R) and Main’s (M) size.

[Gary WA]

http://www.fordgarage.com/pages/diamondblock.htm