Help identifying this engine

[Richard Farrant]

Originally Posted by Bob Brown

I have come across a military 4 cylinder engine on two rails with a radiator mounted on the front, The bottom of the radiator has a hole at the bottom for a hand crank. It appears to be very military. (painted OD Green) The only markings that are seen is “BMC” stamped on the valve covers. Anyone got any ideas? Will try to post a picture.

Bob,

A picture would be welcome, or more details might help. Is it side or overhead valve? Assume its petrol? Is "BMC" in large letters? Are valve covers separate for each cylinder?