Water pump failures
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
I am reading this as flat washers between the water pump flange and the bushing to space the bushing forward. Is that also spacing the pulley forward? Or, the real question, did you shim the center of the pulley forward at the center hole and leave a gap between the water pump flange and the pulley at the bolt holes?
Maybe I'm mis-reading what you did?
[QUOTE=Mossy66; I dropped a couple of flat washers behind the bushing to bring it flush, and I think I'm good to go!
Maybe I'm mis-reading what you did?
[QUOTE=Mossy66; I dropped a couple of flat washers behind the bushing to bring it flush, and I think I'm good to go!
Le Mans Master
Joined: Apr 2005
Posts: 6,360
Likes: 429
From: Seattle Area WA
On those Hayden clutches with the brass spacer insert, you need to insert flat washers into the clutch hub before you insert the spacer to make the spacer flush with the hub's mating surface. If not, the spacer sits too deep in the hub to engage the water pump shaft.
Burning Brakes
Joined: Aug 2001
Posts: 1,104
Likes: 1
From: Frederick Md
Why are my water pumps failing? I've had the car a year now and I need another water pump. This will be the fourth one. The first one failed after I'd owned the car for a month or two, and I thought nothing of it. I replaced it with a water pump from Pep Boys. It was a Bosch unit and it lasted about a week. I think it was junk from the get go. I returned it and got one from NAPA. That one failed today. (bearing sqauealing, or impeller rubbing the back side of pump, but still works)
The engine is a 327 350hp from a '67 corvette. It does not have the correct intake manifold. I am mentioning this because I read something in the archives after doing a search that the high hp cars had a bypass to prevent cavitation? The engine has extra pulleys so I installed a belt from crank to water pump in addition to the alternator belt. I do not believe the belts are too tight
The first and third water pumps failed immediatly after a couple of spirited runs through the gears near redline.
So what do you think, am I just unlucky with water pumps?
Thanks
Gerry
The engine is a 327 350hp from a '67 corvette. It does not have the correct intake manifold. I am mentioning this because I read something in the archives after doing a search that the high hp cars had a bypass to prevent cavitation? The engine has extra pulleys so I installed a belt from crank to water pump in addition to the alternator belt. I do not believe the belts are too tight
The first and third water pumps failed immediatly after a couple of spirited runs through the gears near redline.
So what do you think, am I just unlucky with water pumps?
Thanks
Gerry
Safety Car
Joined: Nov 2001
Posts: 4,424
Likes: 619
From: northern CA
Does the new replacement 3916141 Delco fan clutch have a 5/8 inch mating hole, a la the old style original factory fan clutch? ..
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,552
Likes: 99
From: Lake Villa Illinois
St. Jude Donor '14
On those Hayden clutches with the brass spacer insert, you need to insert flat washers into the clutch hub before you insert the spacer to make the spacer flush with the hub's mating surface. If not, the spacer sits too deep in the hub to engage the water pump shaft.
Gerry
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,552
Likes: 99
From: Lake Villa Illinois
St. Jude Donor '14
Gerry
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
I don't think there's any question the pumps with the larger bearings last longer. Best I remember the OEM pumps, circa mid '60's were good for 50-80K miles before they started leaking. Of course there were exceptions.
I have a ' 65 and a '66 OEM SB pumps on two different engines that are still working and never been touched.
I have a ' 65 and a '66 OEM SB pumps on two different engines that are still working and never been touched.
Le Mans Master
Joined: Jan 2002
Posts: 8,913
Likes: 283
For what it's worth, when I go the parts house, there are often two choices in pumps, new and reman. I have always gotten new pumps for my projects as I don't trust of shore reman jobs anymore. Granted, new is probably from of shore, but I have had good luck with new. The price was about 7-10 dollars more for the new.
I gave up years ago on the Autozone, Carquest, Pep Boys, etc. For years I have been using the same parts house that the shops in town use. They may not be convenient or near by, but they have multiple selections, and if they don't have what you want they can get it in a day or two.
Mark
I gave up years ago on the Autozone, Carquest, Pep Boys, etc. For years I have been using the same parts house that the shops in town use. They may not be convenient or near by, but they have multiple selections, and if they don't have what you want they can get it in a day or two.
Mark
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Melting Slicks
Joined: Feb 2007
Posts: 2,937
Likes: 163
From: OP Kansas
C2 of Year Finalist (appearance mods) 2019
I would like to know how you get one belt on that connects the water pump and the crank?
Both of those items don't have any adjustment, you would have to force the belt on unless it had an idler wouldn't you? Am I missing something here?
I'm confused.
Both of those items don't have any adjustment, you would have to force the belt on unless it had an idler wouldn't you? Am I missing something here?
I'm confused.
Race Director
Joined: Nov 2000
Posts: 10,347
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From: Beverly Hills (Pine Ridge) Florida
Plasticman
Burning Brakes
Joined: May 2002
Posts: 751
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From: Escondido CA
Melting Slicks
Joined: Feb 2007
Posts: 2,937
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From: OP Kansas
C2 of Year Finalist (appearance mods) 2019
Race Director
Joined: Nov 2000
Posts: 10,347
Likes: 672
From: Beverly Hills (Pine Ridge) Florida
But would that be tight enough? I just have never seen a set-up like this before on any type of machinery. Usually a set-up like this would require an idler pulley. I'm certainly no expert, and even though you should not make a belt tight to prevent premature wear on the bearings, I don't see how this could be tight enough. I guess there is a lot off things about these cars that are not usual.
Proper sizing of the belt is very important obviously, but if GM did it, it certainly works (and provides a backup for the water pump if the other belt gets thrown or damaged). You can always get to a service station or home if the alternator is not functioning, but you do need to keep that water pump rotating!
Plasticman
Last edited by Plasticman; Jun 18, 2008 at 10:57 PM.
Team Owner
Joined: Oct 2000
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From: Washington Michigan
Le Mans Master
Joined: Nov 2000
Posts: 7,246
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From: Going too fast over the hill. Iowa
http://www.stewartcomponents.net/Mer...y_Code=ChevyS1
current price $78.95
Not having to remove the A-C compressor and the pump every year, priceless.........
current price $78.95
Not having to remove the A-C compressor and the pump every year, priceless.........
Last edited by magicv8; Jun 20, 2008 at 12:06 PM.
