C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1994 LT1 water pump leak ??

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Old Mar 29, 2007 | 05:51 PM
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Default 1994 LT1 water pump leak ??

Well, last summer I had a small leak at the thermostat housing. Replaced the o-ring since the old one was rock hard. Solved that leak.

Took the car out of storage this week and have driven it a few days and still see AF on the underside of the hood. When I got home today I popped the hood and with a drop light found another leak. It is at the very top of the water pump. Looks like the seal/gasket that goes between the body and the front cover is leaking. I could see it bubbling out there.

Question is, can I just buy a new gasket or use some sort of RTV and just reseal it or do I need to replace the entire pump?? Hate to pull off that cover and have all sorts of parts drop out on me Might be worth a shot before buying a new pump ??

If I do need a new pump, where is the best place to get one ??

Thanks
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Old Mar 29, 2007 | 07:28 PM
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Penny wise, pound foolish.

Replace the pump. If it's old enough for the gaskets to be bad, then it's old enough for the whole thing to be bad.

And open up the optispark to see if it's been trashed by the coolant.
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Old Mar 30, 2007 | 07:16 AM
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you're probably right
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Old Mar 30, 2007 | 09:33 AM
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pm sent
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Old Mar 30, 2007 | 09:51 AM
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You can find some good, new WP deals on Ebay this week.
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Old Mar 30, 2007 | 11:53 AM
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Originally Posted by onedef92
You can find some good, new WP deals on Ebay this week.
Found 2 of them. Big difference in price and part number but both claim to be genuine AC Delco ??
Any experience with either person ??

http://cgi.ebay.com/ebaymotors/Brand...QQcmdZViewItem

http://cgi.ebay.com/ebaymotors/93-94...QQcmdZViewItem

Also checked autozone & advance auto parts. They sell a Cardone with lifetime warranty for $160

Now I'm confused

C4TOMCAT

Got your PM, thanks
Can't seem to find anyone selling that o-ring?
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Old Mar 30, 2007 | 12:28 PM
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Originally Posted by corvette-pilot
Found 2 of them. Big difference in price and part number but both claim to be genuine AC Delco ??
Any experience with either person ??

http://cgi.ebay.com/ebaymotors/Brand...QQcmdZViewItem

http://cgi.ebay.com/ebaymotors/93-94...QQcmdZViewItem

Also checked autozone & advance auto parts. They sell a Cardone with lifetime warranty for $160

Now I'm confused

C4TOMCAT

Got your PM, thanks
Can't seem to find anyone selling that o-ring?
I bought a water pump and an opti earlier this month from thepartsladi, excellent dealing. Quick service and great price on genuine GM.
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Old Mar 30, 2007 | 01:44 PM
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Originally Posted by teebee1994
I bought a water pump and an opti earlier this month from thepartsladi, excellent dealing. Quick service and great price on genuine GM.
"thepartsladi" are awesome! I buy almost exclusivly from them for my '93. You cannot beat their prices, and I have talked to them a few times on the phone. They stand behind what they sell, and will exchange/refund if you are not happy. Just look at their ebay ratings....nothing but praises....

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Old Mar 30, 2007 | 02:53 PM
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Is thepartsladi the one who always gives a shout out to Jesus at the end of their ads? If so, go for it. I've purchased from them before and never got beat, either.
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Old Mar 30, 2007 | 11:27 PM
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You can get new aftermarket WP with lifetime warranty for about $125.
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Old Apr 2, 2007 | 07:49 AM
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Originally Posted by Vis Croceus
You can get new aftermarket WP with lifetime warranty for about $125.
Link
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Old Apr 2, 2007 | 11:51 AM
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Ill sell you the front o ring out of my used 94 water pump, it never leaked a drop.

Make an offer and include shipping in the figure
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Old Apr 2, 2007 | 02:25 PM
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Originally Posted by Casethecorvetteman
Ill sell you the front o ring out of my used 94 water pump, it never leaked a drop.

Make an offer and include shipping in the figure
From Australia
Probably cheaper to buy a new pump
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Old Apr 2, 2007 | 02:39 PM
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Old Apr 3, 2007 | 07:12 AM
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Well, went to the dealer last night. Turns out the parts department is able to get the o-ring ! Should be here today and only cost 5 bucks Based on how hard and brittle the T-stat seal was I am sure this one will be the same. Worth a shot vs spending $200 for the pump. See how it goes.
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Old Apr 3, 2007 | 07:20 AM
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So how do you feel about replacing the cap, rotor, distributor, and water pump when the rear seal in the pump fails and it dribbles out of the weap hole and corrodes the guts out of the distributor components below??
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Old Apr 3, 2007 | 07:21 AM
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Factory water pump only lasted 41k on my Vette. With that poor performance, come time to replace it, I was looking for the factory replacement. $125 for lifetime replacement at Advance Auto, 5 minutes from my house.
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To 1994 LT1 water pump leak ??

Old Apr 3, 2007 | 09:44 AM
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Originally Posted by corvette-pilot
Well, went to the dealer last night. Turns out the parts department is able to get the o-ring ! Should be here today and only cost 5 bucks Based on how hard and brittle the T-stat seal was I am sure this one will be the same. Worth a shot vs spending $200 for the pump. See how it goes.
Is yours the vented Opti or the early unvented model?

I'm not sure I'd be willing to risk total Opti failure over a leaking water pump. If the gasket's failing can the entire pump be far behind? You've got to ask yourself.
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Old Apr 3, 2007 | 10:24 AM
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Have you thought about an electric?

I love mine.
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Old Apr 3, 2007 | 12:15 PM
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Originally Posted by vetteblack
Factory water pump only lasted 41k on my Vette. With that poor performance, come time to replace it, I was looking for the factory replacement. $125 for lifetime replacement at Advance Auto, 5 minutes from my house.
Same here, I just changed mine out this winter as it had a weep from the weep hole. Milage on the 96 vert was 42,000.
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