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

Need help right now!!!! Please!

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Old Sep 17, 2010 | 09:41 PM
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Default Need help right now!!!! Please!

OK, I am in the middle of putting in my new water pump and when I took a closer look at my water pump, the gasket does not match the holes very well... I also have a really rough edge where the channel meets the block, can I dremmel this down to make it smooth? I dont know what to do! I am about to take pics right now...

Thanks guys!
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Old Sep 17, 2010 | 09:50 PM
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Here is the new water pump:



It has a lip to the edge... That looks like it will impede flow!!!!

Here is the old water pump


Any thoughts?
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Old Sep 17, 2010 | 09:57 PM
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It should be okay, but if you are worried about it take your Dremmel and carefully smooth it out.
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Old Sep 17, 2010 | 10:04 PM
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Originally Posted by pmihaltian
It should be okay, but if you are worried about it take your Dremmel and carefully smooth it out.
I have never attempted this... Should I really bother? Im tempted to just do the edge that has the lip and leave the rest... Do you think it will cause running temp changes or accelerated wear in the water pump?

Thanks for the quick response, I am litteraly outside sitting on my tire scraping the old gasket off the block
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Old Sep 17, 2010 | 10:06 PM
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All will be ok just get that big burr off and don't let the metal fall into the pump.Deburr the dowel pin holes also.
Waterpump drain????think about it.
Make sure it all fits before you put sealant on the gaskets(put on car then remove)just to make sure the dowel holes,bolt holes and splines all line up.
Are you replacing your w/p seal in the timing cover?
You must use a special tool or marker cap.

Do not forget the drive coupler from your old pump

I used permatex high tack on the gaskets,man thats some good stuff
http://www.permatex.com/products/Aut...et_Sealant.htm
and I used this on the bolts(you must seal the bolt threads
http://permatex.carshopinc.com/produ...id/42283/80632

Last edited by tblt44; Sep 17, 2010 at 10:14 PM.
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Old Sep 17, 2010 | 10:09 PM
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Just dremel the openings to match the gasket and you should be just fine. Using the dremel is easy; just use strokes and take your time. If you do you'll be surprised at the professional looking result you will get.
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Old Sep 17, 2010 | 10:10 PM
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Originally Posted by tblt44
All will be ok just get that big burr off and don't let the metal fall into the pump.Deburr the dowel pin holes also.
Waterpump drain????think about it.
I used permatex high tack on the gaskets,man thats some good stuff
http://www.permatex.com/products/Aut...et_Sealant.htm
and I used this on the bolts(you must seal the bolt threads
http://permatex.carshopinc.com/produ...id/42283/80632
Ok, I am going to try dremmeling and is this ok for the bolts? I am going to use it along with the gasket too:
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Old Sep 17, 2010 | 10:43 PM
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Ok, I dremmeled the edge and some of the rough parts... I think thats good enough, it came out pretty good, I will post pics later... Now, will that gasket stuff be good for the bolts or do I need the Teflon stuff?
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Old Sep 17, 2010 | 10:49 PM
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If it does not say its for threads I wouldn't use it.I used what I used because it looked like what GM used from the factory.
I would think any pipe thread sealant would work.I just used the permatex on mine because it was at the auto parts store,right next to the HIGH TACK stuff I used for the gaskets.I have no leaks,some people have leaks and have to pull it apart a second time.
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Old Sep 17, 2010 | 10:56 PM
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Originally Posted by tblt44
If it does not say its for threads I wouldn't use it.I used what I used because it looked like what GM used from the factory.
I would think any pipe thread sealant would work.I just used the permatex on mine because it was at the auto parts store,right next to the HIGH TACK stuff I used for the gaskets.I have no leaks,some people have leaks and have to pull it apart a second time.
Ok Thanks!
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Old Sep 17, 2010 | 11:04 PM
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I would've just got new GM gaskets as I'm pretty sure that is a aftermarket waterpump.My motto is "if it don't look right,don't use it or get another" to verify that you received the correct part.Dermel should work though.Good luck & are you replacing opti while you are there?How are the front cover seals & oil pan gasket?Any leaks from those areas?
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Old Sep 17, 2010 | 11:22 PM
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Originally Posted by 94vettelover2
I would've just got new GM gaskets as I'm pretty sure that is a aftermarket waterpump.My motto is "if it don't look right,don't use it or get another" to verify that you received the correct part.Dermel should work though.Good luck & are you replacing opti while you are there?How are the front cover seals & oil pan gasket?Any leaks from those areas?
The ac delco part was double the price! Im not changing the opti and there are no oil leaks... im about to put the pump on now.
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Old Sep 18, 2010 | 10:31 AM
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I used the felpro gaskets on mine.
Looks like your problem is the waterpump casting.
What brand pump did you buy?
was your old pump leaking from the weap hole?
I installed a drain on mine when I had it off.
That requires drilling and tapping a hole and installing a fitting and a hose.
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Old Sep 18, 2010 | 03:23 PM
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Originally Posted by tblt44
I used the felpro gaskets on mine.
Looks like your problem is the waterpump casting.
What brand pump did you buy?
was your old pump leaking from the weap hole?
I installed a drain on mine when I had it off.
That requires drilling and tapping a hole and installing a fitting and a hose.
I purchased a bosch water-pump. My old one was leaking onto the belt from the weep hole and it caused the power steering pump to stop working because the belt slipped. Its amazing how much HP the power steering uses!!! I dremeled it and took your advice with the thread sealer! I just went out for a shakedown and she performed flawlessly! Constant 193 degrees F and no leaks! I didnt bring her above 3k rpm except for once near the end of my 50mile shake down. After a few 100 miles the pump should be broken in and ready to go! Just in time for the Toys for Tots Run in AC!

Thanks for your fast advice/help! Its always nice for some second advice when you are not sure what to do!
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