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1995 Chevrolet Silverado Z71 6.5 TD
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Discussion Starter #1
Haven't been on this forum for months now, and I considering replacing my wp because i believe its leaking either through the weep hole or at the back plate. I wanted to know if either of these wps are compatible with my 1995 K1500 they are both AC.
251-603
251-590
(y)
 

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251-603 will fit, but i don't think it's a high flow model.

I installed an ACD 252717 high-output pump on my ride. It made a huge difference. It never gets above 195 degrees, whereas before it was possible to get it up to 210 on the interstate going uphill.
 

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Just received my AC Delco 252-717 today for my current rebuild. $60 Rockauto. 5% off if you put 8FBA1B0E866421 in "how did you hear about us" box at check out.
 

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Premium Member
1995 Chevrolet Silverado Z71 6.5 TD
Joined
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95 Posts
Discussion Starter #4
251-603 will fit, but i don't think it's a high flow model.

I installed an ACD 252717 high-output pump on my ride. It made a huge difference. It never gets above 195 degrees, whereas before it was possible to get it up to 210 on the interstate going uphill.
You bought a high flow pump that uses the stock fan and fan clutch. Do you know what the GPM is by chance.Did you change your thermostat to 190? I'm thinking about using a later version 1999 or 2000 to utilize the larger Duramax fan and the larger Hayden 2886 fan clutch. Did you look at the wp 251-603 on Amazon the wp pulley is pressed on. Leroy Diesel has a nice setup for 384.00 which is the wp, duramax fan and hayden fan clutch. The way you went would be cheaper for me. Thank you for your input on this.
 

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Premium Member
1995 Chevrolet Silverado Z71 6.5 TD
Joined
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95 Posts
Discussion Starter #5
Just received my AC Delco 252-717 today for my current rebuild. $60 Rockauto. 5% off if you put 8FBA1B0E866421 in "how did you hear about us" box at check out.
What part of the country do you live in. does it get hot there. I want my truck to run KOOL in the summer.
 

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Premium Member
1995 Chevrolet Silverado Z71 6.5 TD
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95 Posts
Discussion Starter #7

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You bought a high flow pump that uses the stock fan and fan clutch. Do you know what the GPM is by chance.Did you change your thermostat to 190? I'm thinking about using a later version 1999 or 2000 to utilize the larger Duramax fan and the larger Hayden 2886 fan clutch. Did you look at the wp 251-603 on Amazon the wp pulley is pressed on. Leroy Diesel has a nice setup for 384.00 which is the wp, duramax fan and hayden fan clutch. The way you went would be cheaper for me. Thank you for your input on this.
Its a 130 gpm high flow model. You can use the dmax fan on it, if you use a slightly different fan clutch, i think its a hayden 2831 but i may be wrong on that.
 

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1995 Chevrolet Silverado Z71 6.5 TD
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