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Mod | | | Forums66 Topics128,062 Posts1,055,854 Members48,428 | | 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!
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#60234 05/08/2006 7:20 PM | Joined: Nov 2000 Posts: 582 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 582 | Mounted my rebuilt water pump on my 261 block (1958). When I put on my old pump pulley, the rear edge of the pulley hits the metal of the pump housing at the bottom of the water outlet location near the casting number. The casting number of my old pump and the rebuilt pump are the same (3736567) but the old pump shaft is about 1/2" longer than the rebuilt one which effectively moves the pulley and fan a bit further away from the pump and towards the radiator. It's in a GMC truck so I don't have the issue with radiator clearance. Distance from pump shaft seal to end of the shaft on my old pump is appx 1.5". Rebuilt pump dimension is appx 1". Anyone had a problem with this before? | | |
#60235 05/08/2006 11:15 PM | Joined: Feb 2005 Posts: 469 Shop Shark | | Shop Shark Joined: Feb 2005 Posts: 469 | The rebuilder probly rebuilt a pump that someone had altered and never noticed it's short comings. I'd take it back and compare it to another one. | | |
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