Sign in to follow this  
agriffey

'40 Buick large & small water pumps.

Recommended Posts

I just removed the tired engine from a '40 Buick Super and am installing a rebuilt from a '40 Special. The old Super engine had a larger water pump and larger pulley than the engine I am putting in.

What's the story here, was it a later pump on the Super?

Should I use the larger pump? How about the large pump and the small pulley together? The smaller pulley will make the fan run faster.

I'm new to these old Buicks.

Please help.

Share this post


Link to post
Share on other sites


Benefits of AACA Membership.

I posted this on the Pre-war........ it goes along with the question above.

In another post, someone suggested using a fan blade from a '50's engine..... more blades.

Last weekend the Alamo club visited Jerry Coulsons new shop and sitting in the corner was this engine with a 6 blade fan. It was '38 or earlier as the transmission was a floor shift.

What year Buicks used this fan and will it fit my '39 with or without modification?

Attached Thumbnails

__________________

post-30596-143138354784_thumb.jpg

Share this post


Link to post
Share on other sites

A Buick restoration shop told me to get a 5 blade fan at a NAPA store for those cars. He said it is a flex fan with wider blades.

Share this post


Link to post
Share on other sites

The larger water pump is off a later engine. I would guess that the Super had an engine transplant sometime in its past. The small and large water pumps won't interchange without also changing the engine :)

Bill

Share this post


Link to post
Share on other sites

Thanks for that Bill. Saves me a lot of trouble and wondering.

The serial number of the Special matches the title, the engine from the Super does not match the Super's registration so I guess you are right... It has had an engine change in the past.

I will get the NAPA 5 blade flex fan though.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this