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#4480570 - 08/06/17 09:00 AM Water pump recommendations. GM 4.3 Vortec
dlundblad Offline


Registered: 09/30/13
Posts: 9998
Loc: Indiana
I replaced my LIM gaskets on the Blazer a few weeks ago. My water pump is now leaking between the cast housing and steel heater hose pipe. The pump itself does not leak so I tried some waterproof JB Weld. I am not one for "hillbilly" fixes, but I figured it was worth a shot. Now, it appears to be leaking faster.

Without a doubt, I know the ~$150 OE pump is the best option. Just curious if anyone has had any good experiences with the not as costly aftermarket options. Thanks in advance folks.

I'd prefer to order from Rock Auto, but as always, shoot me some suggestions.
Rock Auto: Chevrolet- blazer- 4.3V6- cooling system- water pumps
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4480581 - 08/06/17 09:08 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
ls1mike Offline


Registered: 06/14/08
Posts: 5103
Loc: In the Garage...
I have run new aftermarket pumps on my GM stuff to include an 89 GMC 1 ton, 1991 S-10 Blazer, 1998 Buick Regal GS and the Trans Am has one to, as I dropped the original during the cam swap and broke it.

For that think a good new after market one will be fine.
_________________________
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#4480588 - 08/06/17 09:16 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: ls1mike]
dlundblad Offline


Registered: 09/30/13
Posts: 9998
Loc: Indiana
Originally Posted By: ls1mike
I have run new aftermarket pumps on my GM stuff to include an 89 GMC 1 ton, 1991 S-10 Blazer, 1998 Buick Regal GS and the Trans Am has one to, as I dropped the original during the cam swap and broke it.

For that think a good new after market one will be fine.


Thanks for sharing your experience. The Gates and AC Delco professional seem like the only good choices as I don't recognize the other brands. They are fractions cheaper than the OE unit too.

I take that back. I've heard of A1 Car-done, but I'd prefer to stay away.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4480593 - 08/06/17 09:26 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
BigD1 Offline


Registered: 08/12/15
Posts: 2575
Loc: NC
No studs included on none of those pumps that I could see. I always replace them if they are old. I also replace the nuts too because they can be rusty or buggered up. Just bought an Asin pump for my Toyota pickup, and the studs were pre-installed.

Personally, I usually buy Gates if available, and Gates usually come with new studs. The first GMB I used on my Volvo lasted 12 years, and the pump was still working fine. The rubber seals that came with the kit turned to dust, and that caused the leak. New GMB has been on there for over a year, and it's doing just fine.
_________________________
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#4480594 - 08/06/17 09:27 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
I have also had good luck with new aftermarket replacement pumps for GM engines. I'm not a huge fan of anything Airtex which I believe is what the Gates is. I've had the best luck with GMB pumps which are available through several retailers including Summit, Advance Auto, Amazon etc. Good luck on your repair.
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#4480599 - 08/06/17 09:32 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
The_Eric Offline


Registered: 03/31/10
Posts: 5354
Loc: Iowa
I typically use the pumps from O'Reilly- they're now part of the Murry line. Many times the label will state that it's assembled in the U.S.A. from domestic and foreign parts. In fact I just bought one for a 350 swap on a truck I'm doing now that said that. Dont think ive ever had a warranty issue with one.
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#4480690 - 08/06/17 11:27 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
gonefishin Offline


Registered: 03/15/10
Posts: 32
Loc: Dallas, TX
I'm usually a Rock Auto guy but I replaced my perfectly fine stock water pump with Autozone duralast when I had to replace my fan clutch on my Trailblazer. The first one lasted 65k miles. The free replacement lasted 69k miles. So now I'm on my third (free replacement). If you are willing to do the work every 65k or so, it's an option. If I had to do it over again, I'm not sure I would have went with the Duralast.
I just wanted to give you my real-life data.


Edited by gonefishin (08/06/17 11:29 AM)
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#4480702 - 08/06/17 11:35 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: BigD1]
Kruse Offline


Registered: 10/05/05
Posts: 4294
Loc: Kansas
Originally Posted By: BigD1

Personally, I usually buy Gates if available


I have yet to buy a Gates water pump where it was not made in China. Am I just buying them for the wrong applications?

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#4480980 - 08/06/17 04:18 PM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
TX_1821 Offline


Registered: 05/25/17
Posts: 69
Loc: Arlen Texas..... (Houston)
Remember my dad using ACdelco on a 99' 1500 silverado.
Voretc motor, I'm pretty sure.

Lasted another 60,000ish miles before he sold it and don't know anything from there.

Anyways just google the part or amazon it and you'll see around the price they go far.
Finally check eBay, as they are a few buck cheaper than Amazon.

I will say that a brand named GHB GMT GMB something along those lines only lasted about 40,000 miles on a 2010 1500 ram.
Compared to an ACdelco one side by side, it was quite poorly made.

LOL, @ GHB. LOL
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#4481005 - 08/06/17 04:47 PM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 6135
Loc: USA
Get the OE water pump smile

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#4481516 - 08/07/17 07:17 AM Re: Water pump recommendations. GM 4.3 Vortec [Re: dlundblad]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
I'm late to this thread but I'd recommend the ACDelco from RockAuto or Amazon.

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