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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!
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| | | | Joined: Dec 2007 Posts: 45 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2007 Posts: 45 | Is there a simple way to convert a long shaft water pump to a short shaft? If I take it to a machine shop, what dimension do I ask for? | | | | | Joined: Sep 2003 Posts: 1,820 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 1,820 | Jim - It depends on what kind of pulley you will be using on the water pump and the space you have between the water pump and the radiator. Joe 
"Truckin' Around .......... Since 1937!" My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.Operators are standing by to take your calls! Now cruising in the Passing Lane | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | The procedure I used was:
Practice on the old pump. Get the pulley you need. I used a Ford pulley that fit exactly. Measure the difference in dish between the new and old pulley. Press the shaft collar on the water pump toward the engine in a hydraulic press. Install pump and pulley, see if it lines up. Cut off excess shaft.
Repeat on brand new pump from Napa.
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