Waterpump
Thread Starter
Burning Brakes
Joined: Dec 2005
Posts: 998
Likes: 0
From: Indianapolis IN
Waterpump
Since I think my water pump or gasket is leaking fluid (spitting more like it) I am going to swap them both.
I was looking in my summit catalog and they have small chevy listed twice, once with short and one with long...which version does an 89 Auto need?
I was looking in my summit catalog and they have small chevy listed twice, once with short and one with long...which version does an 89 Auto need?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by MorpheusGPR
Since I think my water pump or gasket is leaking fluid (spitting more like it) I am going to swap them both.
All C4s with the Gen I engine use a SHORT water pump with the reverse (CCW) rotation.
RACE ON!!!
Le Mans Master
Joined: Jun 2001
Posts: 6,694
Likes: 3
From: Less Talk, More WOT | Houston TX
Thread Starter
Burning Brakes
Joined: Dec 2005
Posts: 998
Likes: 0
From: Indianapolis IN
I went to RockAuto and found they have some A-1 Cardone units that look decent. One is a normal pump and one labled heavy duty so I am going to give the heavy duty unit a try.
Melting Slicks
Joined: Apr 2002
Posts: 2,118
Likes: 0
From: St. Charles, MO Route 66 Corvette Club
MorpheusGPR: I agree with CFI-EFI in that you need to make sure the water pump is the problem. Many times the hose clamp will loosen with age and a leak developes. A few turn with a screwdriver may solve your problem. If you do decide you need a water pump, I have a used on in the basement and it had 35,000 miles when I change it out about four years ago. Why did I change it out? I repainted parts on my engine and the water pump was an easy change out during the painting process. As for the pump, a friend gave me a brand new GM unit 
I will take $20 plus shipping for the used pump if you are interested and it does not have a warranty.
I will take $20 plus shipping for the used pump if you are interested and it does not have a warranty.
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
water pumps
be careful when buying pumps.
1. there is a short pump with a 5/8" shaft snout w/normal rotation
2. there is a long water pump with a 5/8" shaft snout w/normal rotation.
3. there is the early corvette pump that is longer than a short pump by 3/64" with a 1/2" shaft snout
4. there is the one we use that has the same length, but is reverse rotation and has 1/2" snout.
Do not buy a short early pump, the impeller will rotate the wrong way, and your car will overheat quickly.
The correct one is about $109 At CHECKER, and the edelbrock unit is about $178
just be careful is all i'm sayin
1. there is a short pump with a 5/8" shaft snout w/normal rotation
2. there is a long water pump with a 5/8" shaft snout w/normal rotation.
3. there is the early corvette pump that is longer than a short pump by 3/64" with a 1/2" shaft snout
4. there is the one we use that has the same length, but is reverse rotation and has 1/2" snout.
Do not buy a short early pump, the impeller will rotate the wrong way, and your car will overheat quickly.
The correct one is about $109 At CHECKER, and the edelbrock unit is about $178
just be careful is all i'm sayin
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