Home » Public Forums » GMCnet » Is my water pump on its way out?
| Is my water pump on its way out? [message #87637] |
Mon, 07 June 2010 10:49  |
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Well Ive noticed a strange sound from my engine lately, sorta like steel casters rolling on smooth concrete, and my water temp gage has been acting real funky. it used to settle in right between the 1/4 mark and 1/8 now it rises up to 1/2 yet when I stept on the gas it comes back down to arond 1/4. at first I thought it was a stuck Tstat, but now I hear the noise and I think the waterpump may be on its last legs, does any of this sound familure?
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: Is my water pump on its way out? [message #87646 is a reply to message #87641] |
Mon, 07 June 2010 11:14  |
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Well, the fan clutch seems to be relatively new on my coach, it does like to stay on more then off however, and I am building an electric fan set to replace the mechanical one with 2 17" fans off of T-bird supercoupes which move each over 3k CFM. though that project has just been in the mockup stage, not actually put into operational status as of yet.
The noise is whas has me though, it just started about a week ago. and it has coincided with the erratic temp readings. the fan however seems to be drawing more then enough air through, and the upper rad hose is hot but not as hot as you would think it would be when the OEM temp gauge is at 50%. so im abit at a loss.
I guess I could remove the fan and run the engine when its cold to see if the noise goes away...
| Bob Horton wrote on Mon, 07 June 2010 11:03 |
I was having my rad flushed a couple of years back and there was a racket that sounded like the water pump was going. In fact the rad shop said the noise was the water pump. A couple of hundred miles later the fan clutch gave out. Changed the fan clutch - no more noise. The water pump is still going. (Touch wood)
I can't claim to be an expert on water pumps although I have changed more than a few on old oldsmobiles I owned in the distant past. Just be sure that its not the fan clutch before you go to the trouble of changing the water pump.
Bob Horton
Brandon, Manitoba
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73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: Is my water pump on its way out? [message #87649 is a reply to message #87637] |
Mon, 07 June 2010 11:23 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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Duce,
A water pump usually goes bad when the seal starts leaking and gets coolant in the bearings. You can detect this by checking a small weep hole under the pump. If you find coolant, then the pump is is on its way out. When the bearings go bad you can detect by opening the hatch at idle and listening for what sounds like a rattle in front of the engine. You also can hear it in front of the grill. If you rev the engine it probably will go away unless the pump bearings are really bad. Fortunately water pumps are usually cheap and you can get one at a local auto store by asking for an Olds Tornado pump the same year as your coach.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: Is my water pump on its way out? [message #87651 is a reply to message #87637] |
Mon, 07 June 2010 11:26 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Duce Apocalypse wrote on Mon, 07 June 2010 10:49 |
Well Ive noticed a strange sound from my engine lately, sorta like steel casters rolling on smooth concrete, and my water temp gage has been acting real funky. it used to settle in right between the 1/4 mark and 1/8 now it rises up to 1/2 yet when I stept on the gas it comes back down to arond 1/4. at first I thought it was a stuck Tstat, but now I hear the noise and I think the waterpump may be on its last legs, does any of this sound familure?
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Grab the fan and try to move it up and down or forward and backwards. There is a good chance the bearings in it or the water pump it is mounted are going. If that does not show anything loosen the belts in the pump and try again. Also check the hole in the bottom of the pump for leakage.
My first guess is you have a bad fan clutch. After that I guess that you have a water pump bearing going out.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Is my water pump on its way out? [message #87652 is a reply to message #87649] |
Mon, 07 June 2010 11:28 |
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I'll check for the coolant but I think I'm loosing coolant since I recently had to refill the coolant resevoir. as for the "rattle" I can hear that at idle, and in front of the grill, and it does go away when the gas is depressed. like it said it sounds like steel casters on smooth concrete...
| shawnee wrote on Mon, 07 June 2010 11:23 |
Duce,
A water pump usually goes bad when the seal starts leaking and gets coolant in the bearings. You can detect this by checking a small weep hole under the pump. If you find coolant, then the pump is is on its way out. When the bearings go bad you can detect by opening the hatch at idle and listening for what sounds like a rattle in front of the engine. You also can hear it in front of the grill. If you rev the engine it probably will go away unless the pump bearings are really bad. Fortunately water pumps are usually cheap and you can get one at a local auto store by asking for an Olds Tornado pump the same year as your coach.
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73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: [GMCnet] Is my water pump on its way out? [message #87756 is a reply to message #87652] |
Tue, 08 June 2010 08:50 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Shan,
Even if left operating for a little while, as Ken said, a bad water
pump will result in a bad fan clutch.
On Mon, Jun 7, 2010 at 9:28 AM, Shan Rose <defconfx@gmail.com> wrote:
>
>
> I'll check for the coolant but I think I'm loosing coolant since I recently had to refill the coolant resevoir. as for the "rattle" I can hear that at idle, and in front of the grill, and it does go away when the gas is depressed. like it said it sounds like steel casters on smooth concrete...
>
>
> shawnee wrote on Mon, 07 June 2010 11:23
>> Duce,
>>
>> A water pump usually goes bad when the seal starts leaking and gets coolant in the bearings. You can detect this by checking a small weep hole under the pump. If you find coolant, then the pump is is on its way out. When the bearings go bad you can detect by opening the hatch at idle and listening for what sounds like a rattle in front of the engine. You also can hear it in front of the grill. If you rev the engine it probably will go away unless the pump bearings are really bad. Fortunately water pumps are usually cheap and you can get one at a local auto store by asking for an Olds Tornado pump the same year as your coach.
>
>
> _______________________________________________
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--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Is my water pump on its way out? [message #87760 is a reply to message #87756] |
Tue, 08 June 2010 11:07 |
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Steve, it is indeed the water pump, I checked the end play, and the shaft is very sloppy in its bore, si I imagine its only a matter of time before it backs out. I cant really afford a failure of that kind at the moment, but I have no choice but to fix it. heh thank god for mastercard....
| Steven Ferguson wrote on Tue, 08 June 2010 08:50 |
Shan,
Even if left operating for a little while, as Ken said, a bad water
pump will result in a bad fan clutch.
On Mon, Jun 7, 2010 at 9:28 AM, Shan Rose <defconfx@gmail.com> wrote:
>
>
> I'll check for the coolant but I think I'm loosing coolant since I recently had to refill the coolant resevoir. as for the "rattle" I can hear that at idle, and in front of the grill, and it does go away when the gas is depressed. like it said it sounds like steel casters on smooth concrete...
>
>
> shawnee wrote on Mon, 07 June 2010 11:23
>> Duce,
>>
>> A water pump usually goes bad when the seal starts leaking and gets coolant in the bearings. You can detect this by checking a small weep hole under the pump. If you find coolant, then the pump is is on its way out. When the bearings go bad you can detect by opening the hatch at idle and listening for what sounds like a rattle in front of the engine. You also can hear it in front of the grill. If you rev the engine it probably will go away unless the pump bearings are really bad. Fortunately water pumps are usually cheap and you can get one at a local auto store by asking for an Olds Tornado pump the same year as your coach.
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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GMCnet mailing list
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73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: [GMCnet] Is my water pump on its way out? [message #87800 is a reply to message #87760] |
Tue, 08 June 2010 20:35 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Shan,
There may be howls of anguish from some folks, but I've installed two
AutoZone Severe Duty pumps and been very happy with them for $29.95
each. The first I removed after about 2K mile in order to replace it
with a prototype reverse-flow pump (I had a serpentine belt on my
455). When that failed on I-95, I bought another AZ pump to replace
it. It now has about 15K miles on it between my own and my son's use
-- no problem at all -- even running it backward.
It's a special order (overnight) item usually, and the price varies
from place to place; I paid $29.95 here; when they asked $39.95 in NC,
I told them what I'd recently paid and that's what they charged me.
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
On Tue, Jun 8, 2010 at 12:07 PM, Shan Rose <defconfx@gmail.com> wrote:
>
>
> Steve, it is indeed the water pump...
I cant really afford a failure of that kind at the moment, but I have
no choice but to fix it. heh thank god for mastercard....
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Is my water pump on its way out? [message #87841 is a reply to message #87800] |
Wed, 09 June 2010 11:11 |
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well I already ordered an aluminum job from Flowkooler via Summit, along with the stuff to assemble my electric fan system. heh I dont wanna se my CC statement for this month, but I figure since I gotta remove the fan and shroud, I mine as well install my electric mega fans lol. if successful I will include video documentry and a how-to for those interested...
| Ken Henderson wrote on Tue, 08 June 2010 20:35 |
Shan,
There may be howls of anguish from some folks, but I've installed two
AutoZone Severe Duty pumps and been very happy with them for $29.95
each. The first I removed after about 2K mile in order to replace it
with a prototype reverse-flow pump (I had a serpentine belt on my
455). When that failed on I-95, I bought another AZ pump to replace
it. It now has about 15K miles on it between my own and my son's use
-- no problem at all -- even running it backward.
It's a special order (overnight) item usually, and the price varies
from place to place; I paid $29.95 here; when they asked $39.95 in NC,
I told them what I'd recently paid and that's what they charged me.
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
On Tue, Jun 8, 2010 at 12:07 PM, Shan Rose <defconfx@gmail.com> wrote:
>
>
> Steve, it is indeed the water pump...
I cant really afford a failure of that kind at the moment, but I have
no choice but to fix it. heh thank god for mastercard....
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: Is my water pump on its way out? [message #88217 is a reply to message #87637] |
Sat, 12 June 2010 09:24 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Anyone come up with the answer on long or short?
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: Is my water pump on its way out? [message #88269 is a reply to message #87654] |
Sat, 12 June 2010 17:22 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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Senior Member |
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| Duce Apocalypse wrote on Mon, 07 June 2010 11:30 |
another thing, I notice there are 2 pumps, a long and a short one for a 73 toro, which one is the one that fits the coach?
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the one that matches the one that's in your coach!
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] Is my water pump on its way out? [message #88412 is a reply to message #88338] |
Sun, 13 June 2010 16:01 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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Yeah, I was hoping to just pick one up before hand, but OK, I'll do that.
May hit the timing chain and gears while I'm there, and will replace the Fuel pump.
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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