by Can someone explain or show me the difference between the long and short water pumps for a small block chevy? I think the one on my 283 is the short pump but don't have anything to compare it to.
2 posters
Water pump?
wideload- Moderator 1st Class
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Mike
WIDELOAD
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donivan65- Governor
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I would say the long shaft is for 2 belt systems,,,,you measure the height of the flange, like how far it sticks out from the engine,,,,,,do you need a 2 belt pulley????? I will get you a measurement of a 6 cylinder pulley so maybe that E bay one will work,,,,,,,
donivan65- Governor
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Location : San Diego, California
Registration date : 2008-05-12
So we are talking about the V8, right? 283-400 cu in engines,,,,,what is the hole spacing on the pulley,,,,,,1 1/4" (6 cyl) or 1 1/2" (8 cyl) center to center,,,,,,
donivan65- Governor
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Now if a water pump is drilled with 2 sets of holes and your fan holes could line up, then a 6 cyl pulley could probably work,,,,,,
wideload- Moderator 1st Class
- Number of posts : 1388
Location : Kevil, Kentucky
Age : 70
Registration date : 2008-05-11
Don I hadn't thought about comparing the two until I read your post. In your pic what are the two pumps off of ?
The bolt pattern on the 292 matches with the pattern on the 283 ( 1 1/4" center to center ) and the depth of the pulleys from both engines matches (2 3/4")back edge to face of pulley. Looks like the one on e-bay would work. I only need a single belt pulley, not running anything but the alternator.
What I'm trying to figure out now is do I have a long or short pump on the 283. When you look at the pulley selection in the catalogs it list them for long or short pumps. On my 283 the distance from the block to the front of the pump flange is 5 9/16". The pump is built in a horse shoe shape and bolts to the block on either side of the timing chain cover. With that measurement would it be a long or short?
The bolt pattern on the 292 matches with the pattern on the 283 ( 1 1/4" center to center ) and the depth of the pulleys from both engines matches (2 3/4")back edge to face of pulley. Looks like the one on e-bay would work. I only need a single belt pulley, not running anything but the alternator.
What I'm trying to figure out now is do I have a long or short pump on the 283. When you look at the pulley selection in the catalogs it list them for long or short pumps. On my 283 the distance from the block to the front of the pump flange is 5 9/16". The pump is built in a horse shoe shape and bolts to the block on either side of the timing chain cover. With that measurement would it be a long or short?
_________________
Mike
WIDELOAD
https://vintage-vans.smugmug.com/Chevy-GMC-Vans/Wideloads-65-66-67-68/i-CK5s29s
donivan65- Governor
- Number of posts : 12220
Location : San Diego, California
Registration date : 2008-05-12
My picture is my 78 350 cu in waterpump,,,,,,but the Napa is a 283,,,,,,But what year is your engine,,,,,so they are different,,,,BUT,,,,,I guess see if any parts place has a waterpump and compare it to your measurement,,,,What are your choices of part #s ??
donivan65- Governor
- Number of posts : 12220
Location : San Diego, California
Registration date : 2008-05-12
well,,,,,,that 2 3/4" deep pulley goes on a 3 7/8" flange face to block 6 cylinder water pump which is the short pump,,,,,
wideload- Moderator 1st Class
- Number of posts : 1388
Location : Kevil, Kentucky
Age : 70
Registration date : 2008-05-11
Your right Don. I have the short pump. Found these pic's on Summit.
Not sure what year the engine is, I've never run the #'s . I'll see what I can find tomorrow.
Not sure what year the engine is, I've never run the #'s . I'll see what I can find tomorrow.
_________________
Mike
WIDELOAD
https://vintage-vans.smugmug.com/Chevy-GMC-Vans/Wideloads-65-66-67-68/i-CK5s29s
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