Buick Crankshaft

buick

#1

I am swapping my 1947 Buick Special Series 40 Sedanette 248CI engine with a manual trans to a 1952 263 CI engine that had a Dynaflow trans. Before I can complete the swap I need to change the crankshaft on the 263 to fit the manual trans. Does anyone know if the 248 crank will fit in the 263?
Or, does anyone know where I might be able to find technical information about what cranks I may be able to use.
Thanks.
Pete


#2

Try Hollander Interchange


#3

You might also check out hemmings.com, find shops that deal with old Buicks.


#4

Keeping in mind that I’m not that knowledgeable on stuff this old, I would say the cranks are not interchangeable based on the journal specifications.

Rod journal diameters on the 263 are shown to be larger than the 248 and for some reason I will never, ever comprehend, the specs show that the 248 uses 5 different main journal diameters with the size increasing (considerably) from journals 1 through 5.
The 263 is shown as having the same size main journals.

It would be interesting to travel back in time and ask the engineers WTH they were thinking…


#5

In each monthly issue of Hemmings Classic Car magazine, their Tech Talk columnist, Mike McNessor, answers technical questions like this one. You can submit your question to him at the following e-mail address:
mmcnessor@hemmings.com

His advice is both free and expert, but you have to be willing to wait a bit for that free advice…