Long VS Short water pump
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Originally Posted by kona
Can anyone tell me how to tell the difference? Is the shaft length different?
Kona
Kona
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
The vette short pump has a 3/4" snout (hole in the pulley that the nub at the end of the pump goes through), the legs of the long pump are longer than on a short pump but I do not know the diff
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Originally Posted by Fevre
The vette short pump has a 3/4" snout (hole in the pulley that the nub at the end of the pump goes through), the legs of the long pump are longer than on a short pump but I do not know the diff
Vette short pump sits closer to block than long creating fan to rad clearance... and has a 3/4" shaft. Eddie
Burning Brakes
Joined: Sep 2004
Posts: 1,167
Likes: 2
From: Ft.Worth Texas
I just measured a couple of pumps.
Short pump is 5 3/4 inch from block to shaft flange outside and 3/4 dia. pilot. (add another 1/4 inch to outside of pulleys plus fan thickness if you have one.)
Long pump is 7 inch to outside of flange and 5/8 dia pilot.
I think there is another 'short shaft' pump that is between these but the vette one is 5 3/4.
Use one too long and there is a problem with frame crossmember and power steering pump pulley.
Short pump is 5 3/4 inch from block to shaft flange outside and 3/4 dia. pilot. (add another 1/4 inch to outside of pulleys plus fan thickness if you have one.)
Long pump is 7 inch to outside of flange and 5/8 dia pilot.
I think there is another 'short shaft' pump that is between these but the vette one is 5 3/4.
Use one too long and there is a problem with frame crossmember and power steering pump pulley.
Racer
Joined: Aug 2004
Posts: 310
Likes: 6
From: New Bern NC
Guys!
Which pump would you recommend that I purchase???
My 69 Corvette is an "original" NOM Car with 350/350hp L46 original engine A/C, P/S, 4-spd (see profile)
I can either go with an "original" GM #3859326 rebuilt water pump (30 Day Warr) $145
-or-
A #38602 Stewart Cast Iron water pump (1yr warr) $89
-or-
Delco replacement (same as auto parts store) $49
I wanted to continue to keep the car original (especially the engine area) so as parts break and wear out I'll replace them with same original part (if available) however since I am not a "gear head" I'm not certain which water pump to purchase. I am sorta leaning towards the original GM rebuilt pump however, A friend (who is a gear-head and big car guy) tells me to go with the Stewart Cast iron (He said I don't need th Cast aluminum one just the cast iron one). I was told all 69 350/350hp cars used short pumps and not long pumps.
Guys, which pump should I purchase? again I'm leaning towards keeping it original, friend recommends the Stewart cast iron.
Comments?
Which pump would you recommend that I purchase???
My 69 Corvette is an "original" NOM Car with 350/350hp L46 original engine A/C, P/S, 4-spd (see profile)
I can either go with an "original" GM #3859326 rebuilt water pump (30 Day Warr) $145
-or-
A #38602 Stewart Cast Iron water pump (1yr warr) $89
-or-
Delco replacement (same as auto parts store) $49
I wanted to continue to keep the car original (especially the engine area) so as parts break and wear out I'll replace them with same original part (if available) however since I am not a "gear head" I'm not certain which water pump to purchase. I am sorta leaning towards the original GM rebuilt pump however, A friend (who is a gear-head and big car guy) tells me to go with the Stewart Cast iron (He said I don't need th Cast aluminum one just the cast iron one). I was told all 69 350/350hp cars used short pumps and not long pumps.
Guys, which pump should I purchase? again I'm leaning towards keeping it original, friend recommends the Stewart cast iron.
Comments?
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