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| | | | Joined: Sep 2003 Posts: 72 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 72 | Hi Guys,
Back for another question. Got the small block V8 in the engine compartment of my 49 GMC 1/2 ton and I've been reading about the short shaft water pumps. Would getting the ss water pump mean I don't have to get an electric fan for my rad? Or do I need to get both? Thanks.
kskt4 | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | The short shaft water pump really only applies to putting in a 235 or GMC engine, since they are longer than the 216. A V8 is shorter, so use whatever pump fits the accessories. You will want to run a fan clutch or spacer.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jan 2001 Posts: 662 Shop Shark | | Shop Shark Joined: Jan 2001 Posts: 662 | When I put the 250 in my 52, the relative height of the fan to the rad was the real problem. I suspect a V-8 would be similar; the fan sits so low it is not very effective. I've seen pics of custom shrouds with V-8s and engine driven fans, but an electric fan is a lot easier. | | | | | Joined: Sep 2003 Posts: 72 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 72 | Thanks again guys. I will look into the electric fan.
kskt4 | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The sbc used 2 lenghts of water pumps. About 70 on back had the short pumps. The newer ones had the long pump. The pulleys & brackets must match. The best setup on an engine swap is good electric fan. 
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | 
#8685 11/25/2004 11:58 PM | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | The pumps with the long offset also had a degree mark on the timing cover that's in the 12:00 position. The line on the harmonic balancer and the tab on the timing cover need to match up, or there's a built-in error setting ignition timing.
Jerry
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