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Old 07-17-2008, 04:25 PM
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Water pump leak SBC help

Hey guys so I got another leak here on my brand new 383 SBC. The leak is in the water pump itself. The pump is off of a 1980 camaro and when the engine gets hot (after atleast 5 mins of running) water will stream out of these two small drill holes. I have no fricken idea what these holes are meant for but there is one on the top of the pump (as shown in the pictures attached) and another one at the bottom of the pump. The holes are about 1/4" diameter and are untapped. I have noticed these holes on the same pump on other SBC engines but those engines don't leak out coolant. The coolant doesn't shoot out of the holes jus forms a stream and gets thrown around by my pulley system all over the engine. Can anyone please tell me what these holes are for and what I should use to close them??

http://img.photobucket.com/albums/v7...n/IMG_5032.jpg
http://img.photobucket.com/albums/v7...n/IMG_5033.jpg
http://img.photobucket.com/albums/v7...n/IMG_5034.jpg

Thanks for all your help,
Keith

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Old 07-17-2008, 04:44 PM
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Hi Keith!! Man, that engine is whippin your butt lately! LOL

the holes are there for a reason......to drain out any coolant that is getting past the inner seal so the bearings don't get taken out and send the fan shooting into the radiator. When the holes are wet or dripping or running coolant, it's new water pump time. Sorry.

Mark
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Old 07-17-2008, 04:45 PM
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Those holes are there to protect the bearing in the front of the pump,
your seals are toast, replace the pump with a fresh rebuild...

K
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Old 07-17-2008, 05:08 PM
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I'm thinking of replacing it with an electric pump. This build has already cost me about 5 times more money than expected and about 10 times more problems than anticipated (as you are well aware JMark haha ) I'm looking on ebay for a cheap electric pump, is there anything wrong with buying one made by Proform?? I know they probably aren't as reliable as the ones for $500 but my budget is killing me!!

Thanks,
Keith
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Old 07-17-2008, 05:42 PM
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dont waste your money on an electric if its only a street car.
not only will you need an electric pump but youll need an electric fan and shroud with all the relays etc.
just get a replacement pump and your wallet will thank you.
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Old 07-17-2008, 06:22 PM
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Quote:
Originally Posted by dawg
dont waste your money on an electric if its only a street car.
not only will you need an electric pump but youll need an electric fan and shroud with all the relays etc.
just get a replacement pump and your wallet will thank you.

Ditto!!!!!!!!!!!!!!!!!!!!!!!!!
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Old 07-19-2008, 12:04 AM
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I bought a couple of brand new GM water pumps (long style) from an Ebayer called dale_wilch. He sells new pumps removed from ZZ4 crate motors used on Boss Hoss motorcycles. The bike frame is designed for a short pump, so they sell the take-off pumps. Go to ebaymotors and search for ZZ4 water pump, and you'll likely see a few. Got a crank damper, too, since the Hoss can't handle an 8-incher.
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Old 07-19-2008, 01:13 PM
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How do I identify if my pump is the long or short style??
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Old 07-19-2008, 01:53 PM
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judging from your pics you have a long pump.
also any chevy SB engine after 68 used long pumps.
long pumps are dimensionally taller that short pumps
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Old 07-19-2008, 02:39 PM
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Quote:
Originally Posted by dawg
judging from your pics you have a long pump.
also any chevy SB engine after 68 used long pumps.
long pumps are dimensionally taller that short pumps

vettes in the 70's still used short pumps
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Old 07-19-2008, 03:08 PM
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Quote:
Originally Posted by sexypizzaman
How do I identify if my pump is the long or short style??
Check here to ID your SBC pump & see what year & models used them.
Todd
http://www.chevytech.com/2c41.html
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