Can a 1940 Roadmaster Engine be used in a 1936 Roadmaster?

[Guest funits]

The motor in my 1936 Roadmaster needs to be rebuilt. Rather than dealing with the bearings in the 1936 engine, can a 1940 Roadmaster engine be successfully used to replace my 1936 engine?

Thanks,

Lee Corson

[eric_b_1937]

Why not just rebuild the 36 engine with insert rod & main, bearings and aluminum domed pistons? You will esentially end up with the same hp engine but without the hassle of different motor mounts or a non original engine when you sell it.

[Guest DaveCorbin]

Dear Lee:

You need to be VERY careful here. Many states used the ENGINE number as the VIN number in the old days. IF you change the engine, you lose the engine number. Now you own the car forever as it can't be legally sold.

Regards, Dave Corbin

[Guest Two Roadmasters]

The thing is that the rear main bearing is slightly longer on the -36 engine compared to -37 engines and onwards, (ask me why I know), which forces you to rebabitt if you want to use your original one. Mine was rebored to correct tolerances without any use of shims and I now feel good in my mind knowing I was able to keep the original engine. The cost is of course essentially higher, but what would you not do to stick to originality.