Author Topic: Water Pumps.....  (Read 2263 times)

Offline truxson

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Water Pumps.....
« on: November 20, 2017, 08:28:55 PM »
Folks:
I'm almost embarrassed to ask this question, but my memory is failing with years...

I have a 76 Chevy truck.  It has 520,000 miles on the frame.  The 350 engine went out years ago and I replaced it with a 1984 (or so) 305.  That engine had more miles on it than the one I took out and is now over 600K!  For the first time, the water pump is leaking.  I thought no problem...look at RockAuto.  BUT....apparently 305 wasn't an option in 76 trucks.  They list a number of pumps for 350.  I looked at 84 305 water pumps.  Again a number of pumps were listed, but the numbers were different from those for the 350.  So...Now for my question.....
Is the short vs. long pump issue the only thing to worry about or is (are) there other things to cause problems?  Does anyone have a recommendation on which pump to use?  I want to try for another 600K!

Sorry for so many words....I hope one of you guys can help me!
Thanks, David. (truxson)

Offline Engineer

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Re: Water Pumps.....
« Reply #1 on: November 20, 2017, 09:23:00 PM »
If the alternator and power steering brackets are original to the truck just get a long water pump standard rotation.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
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Offline truxson

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Re: Water Pumps.....
« Reply #2 on: November 20, 2017, 09:23:50 PM »
They are, and thanks!

David.

Offline Rapid Roy

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Re: Water Pumps.....
« Reply #3 on: November 20, 2017, 09:32:15 PM »
An easy way to be sure is remove water pump and take to auto parts store to get exact match. Always a good idea when unsure.
1974 Cheyenne 10 LWB STOCK 350 W HEI /TH350/AC/4 BBL Quadrajet
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Offline truxson

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Re: Water Pumps.....
« Reply #4 on: November 21, 2017, 08:12:32 PM »
I agree.  But in this case, it's my ride.  It's a long way to the parts house, and would take a couple of hours to walk there!  That's why I took the 'easy' way out and asked for advice.  There are some pretty smart folks on this forum, and I appreciate all the help I can get.

Regards, David.

Offline m3talc0re

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Re: Water Pumps.....
« Reply #5 on: November 26, 2017, 01:47:22 PM »
I was about to start my own thread, but going to add to this one instead...
Anyway, my water pump looks like it is leaking, too. Can the water pump be taken apart and fixed or is it better to just replace it?

Offline VileZambonie

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Re: Water Pumps.....
« Reply #6 on: November 26, 2017, 02:15:30 PM »
A new one ranges from about $14 - $40 dollars. They're throw away items
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Offline Stewart G Griffin

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Re: Water Pumps.....
« Reply #7 on: November 26, 2017, 08:29:18 PM »
Generally, all small block chevy water pumps interchange with each other (although you have to make sure you need either the long or short pump---most likely you need the long pump to match your accessory brackets and pulleys----and even the short and long pumps themselves interchange on the engine itself. MOST applications use the long pump)

i am not sure at the moment which stock-type iron pumps are decent.  i did not have good luck with the Advance auto parts budget line.

i went with an Edlebrock 8811 and am very impressed with the quality.