| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,091 Posts1,056,445 Members48,443 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jan 2019 Posts: 328 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 328 | Hello there,
Looking to confirm the measurements, center to center on the fan mounting bolts as (2- 7/16") as well as the center hub dimensions (15/16') on the 216 water pumps...
Thank you
Philippe Jeanneau
| | | | | Joined: Oct 2015 Posts: 26 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2015 Posts: 26 | It depends. From the 1948 parts book (section 1.064), the bolt circle is either 2-1/4" with 1" shaft hole, or 2-1/16" bolt circle with 1-1/8" shaft. The 2-1/4" and 1" shaft seems to be the most common, the 2-1/16" with 1-1/8" seems to be an optional low speed operation fan. My 1937 SD has a measured 2-1/4" bolt circle and a measured 31/32" shaft hole. It was tight on the water pump pulley, which also measures 31/32".
1935 QD 1.5 ton stake bed
1937 SD 1.5 ton stake bed
1944 MS 1.5 ton stake bed
1946 PW 2 ton stake bed
| | | | | Joined: Jan 2019 Posts: 328 'Bolter | | 'Bolter Joined: Jan 2019 Posts: 328 | Hello there,
Thank you for the information, very useful... I have a 1" shaft hole and a 2 - 1/4" bolt circle which I just confirmed.... The water pump is also dated 5 - 64 and the shaft is marked W 2414-2.
Philippe Jeanneau
| | |
|
|
| |
