What is this? (gm part)

[maxwedge528]

i was under the hood of a very original 55 cadillac sedan deville yesterday and it had a similar glass jar! windshield cleaner reservoir? as a matter of fact there was a gm label advising the owner to empty the bottle in the winter or to mix the water with GM something or another to prevent freezing. also surprising that the manual fuel pump was installed on the top of the motor kinda of in the area of the water neck to the top radiator hose.

[raycow]

Those washer bottles were more common on the higher priced cars than on Chevys. They might have been standard equipment or maybe that class of cars was just more heavily optioned as a matter of practice.

Cadillac wasn't the only engine with a top-mounted fuel pump. The Ford flathead had one and it was infamous for being prone to vapor lock. I don't recall hearing those stories about the Cad though. Maybe GM engineering was better?

Ray

[68SWB4x4]

Thanks for all the info, this weekend I am hoping to clean it up and get some better pictures, I have some other unique parts laying around that need identifying as well