| Replacing engine coolant pump [message #119839] |
Thu, 24 March 2011 17:13  |
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I'm going to soon be replacing the water pump on my engine. Does anyone know of a set of photos covering this job? I searched the photo site and didn't find any.
If there is one available I'd like to see it and if not I'll take lots of photos and post my experiences.
Bill Brown - '77 Buckeye Cruiser
Coshocton OH
carguybill@sbcglobal.net
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| Re: Replacing engine coolant pump [message #119862 is a reply to message #119839] |
Thu, 24 March 2011 21:44  |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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| carguy wrote on Thu, 24 March 2011 17:13 |
I'm going to soon be replacing the water pump on my engine. Does anyone know of a set of photos covering this job? I searched the photo site and didn't find any.
If there is one available I'd like to see it and if not I'll take lots of photos and post my experiences.
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Bill,
There is the album Carl did for his radiator and all work..
http://www.gmcmhphotos.com/photos/showgallery.php?cat=5504
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Replacing engine coolant pump [message #119872 is a reply to message #119862] |
Thu, 24 March 2011 22:30 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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| Dennis S wrote on Thu, 24 March 2011 19:44 |
| carguy wrote on Thu, 24 March 2011 17:13 |
I'm going to soon be replacing the water pump on my engine. Does anyone know of a set of photos covering this job? I searched the photo site and didn't find any.
If there is one available I'd like to see it and if not I'll take lots of photos and post my experiences.
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Bill,
There is the album Carl did for his radiator and all work..
http://www.gmcmhphotos.com/photos/showgallery.php?cat=5504
Dennis
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Thanks Dennis.
I was going to refer Bill to that album, even though there is not much info specific to the water pump, but you beast me to it. 
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Replacing engine coolant pump [message #119878 is a reply to message #119874] |
Thu, 24 March 2011 22:49 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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here is some info , and broken links on pumps, but not how to change them
http://gmcmotorhome.info/watpump.html
gene
On Thu, Mar 24, 2011 at 8:37 PM, Dennis Sexton <dennisfsexton@aol.com>wrote:
>
>
> Carl S. wrote on Thu, 24 March 2011 22:30
> > Dennis S wrote on Thu, 24 March 2011 19:44
> > > carguy wrote on Thu, 24 March 2011 17:13
> > > > I'm going to soon be replacing the water pump on my engine. Does
> anyone know of a set of photos covering this job? I searched the photo site
> and didn't find any.
> > > >
> > > > If there is one available I'd like to see it and if not I'll take
> lots of photos and post my experiences.
> > >
> > >
> > > Bill,
> > >
> > > There is the album Carl did for his radiator and all work..
> > >
> > > http://www.gmcmhphotos.com/photos/showgallery.php?cat=5504
> > >
> > > Dennis
> >
> >
> > Thanks Dennis.
> >
> > I was going to refer Bill to that album, even though there is not much
> info specific to the water pump, but you beast me to it. :)
>
>
> Carl,
>
> You're welcome.
>
> I try to remember all the best sources of photos for jobs I have yet to do
> on the coach.
>
> Dennis
>
> --
> Dennis S
> 73 Painted Desert 230
> Germantown, TN
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: Replacing engine coolant pump [message #119913 is a reply to message #119839] |
Fri, 25 March 2011 10:48 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| carguy wrote on Thu, 24 March 2011 16:13 |
I'm going to soon be replacing the water pump on my engine. Does anyone know of a set of photos covering this job? I searched the photo site and didn't find any.
If there is one available I'd like to see it and if not I'll take lots of photos and post my experiences.
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I've done this job on several Olds engines and although it is straight forward, it's a pain in the ... Lot's of stuff has to come off first and many of the fasteners are different sizes. As Rick D pointed out a while ago, make sure you use the correct gasket (hopefully the one that came with the new pump) and thoroughly clean off the timing cover which forms the rear of the water pump cavity. It's a lousy design as far as I'm concerned.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Replacing engine coolant pump [message #120389 is a reply to message #119839] |
Wed, 30 March 2011 21:40 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Well, I went out and removed mine today. The thing has a seal leaking and anti-freeze is coming out of the center drain/vent hole. It is not a big job if you have the split fan shroud.
1. Get the shroud out of the way In my case it was remove the bottom 1/2 of the shroud. If you do not a split shroud, now is the time to get one from Jim K. or Bert and Faye.
2. Remove the fan clutch with the fan still attached.
3. Remove the fan belts.
4. Remove the pulley on the water pump.
5. Drain the radiator.
6. Remove the lower radiator hose from the coolant pump.
7. Remove the two heater hoses from the top of the pump.
8. Remove power steering pump and it's mounting bracket.
9. Remove the bracket going to the AC compressor.
10. Remove the 8 bolts holding the pump from the front of the engine. Some of the bolts are studs. You might want to memorize which holes they go back in to.
Reverse the above procedure and you are done.
I'm not happy. This is the second time I have had the center seal leak after a few years of use. I discussed this with Blaine and he thinks that the seals are binding or sticking to the shaft after being parked all winter. Then the first time I spin the pump in the spring the seal gets ripped. I do not know the fix to this problem but this time I'm going to try so water pump lubricant in the coolant.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Replacing engine coolant pump [message #120390 is a reply to message #119913] |
Wed, 30 March 2011 21:49 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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Senior Member |
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I agree with Bob, stupid design. such a pain in the ass that I was in no mood to take photos. It is pretty straightforward, It was my first water pump save for a 3.0 chrysler V6, and was easy as pie. Take your time, Use good gasket sealer, pay attention to the gaskets and the holes on the pump. There are several versions. You may want to do the timing set and fuel pump while you are in there...
| Bob de Kruyff wrote on Fri, 25 March 2011 08:48 |
| carguy wrote on Thu, 24 March 2011 16:13 |
I'm going to soon be replacing the water pump on my engine. Does anyone know of a set of photos covering this job? I searched the photo site and didn't find any.
If there is one available I'd like to see it and if not I'll take lots of photos and post my experiences.
|
I've done this job on several Olds engines and although it is straight forward, it's a pain in the ... Lot's of stuff has to come off first and many of the fasteners are different sizes. As Rick D pointed out a while ago, make sure you use the correct gasket (hopefully the one that came with the new pump) and thoroughly clean off the timing cover which forms the rear of the water pump cavity. It's a lousy design as far as I'm concerned.
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-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: [GMCnet] Replacing engine coolant pump [message #120393 is a reply to message #120389] |
Wed, 30 March 2011 22:09 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I have not done much wrenching lately as our guys frown on me showing
them up as to how I can do it without making a mess.
I prefer working from the top.
I pre glue the gasket on the pump and use bolts at left and right to
hang the pump .
I prefer to use the socket end screw drivers for the hose clamps .
I lean the fan and clutch against the radiator as it stays out of the way.
On Wed, Mar 30, 2011 at 7:40 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> Well, I went out and removed mine today. Â The thing has a seal leaking and anti-freeze is coming out of the center drain/vent hole. Â It is not a big job if you have the split fan shroud.
>
> 1. Get the shroud out of the way  In my case it was remove the bottom 1/2 of the shroud.  If you do not a split shroud, now is the time to get one from Jim K. or Bert and Faye.
> 2. Remove the fan clutch with the fan still attached.
> 3. Remove the fan belts.
> 4. Remove the pulley on the water pump.
> 5. Drain the radiator.
> 6. Remove the lower radiator hose from the coolant pump.
> 7. Remove the two heater hoses from the top of the pump.
> 8. Remove power steering pump and it's mounting bracket.
> 9. Remove the bracket going to the AC compressor.
> 10. Remove the 8 bolts holding the pump from the front of the engine. Â Some of the bolts are studs. Â You might want to memorize which holes they go back in to.
>
> Reverse the above procedure and you are done.
>
> I'm not happy. Â This is the second time I have had the center seal leak after a few years of use. Â I discussed this with Blaine and he thinks that the seals are binding or sticking to the shaft after being parked all winter. Â Then the first time I spin the pump in the spring the seal gets ripped. Â I do not know the fix to this problem but this time I'm going to try so water pump lubricant in the coolant.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Replacing engine coolant pump [message #120397 is a reply to message #120389] |
Wed, 30 March 2011 23:19 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| Ken Burton wrote on Wed, 30 March 2011 20:40 |
Well, I went out and removed mine today. The thing has a seal leaking and anti-freeze is coming out of the center drain/vent hole. It is not a big job if you have the split fan shroud.
1. Get the shroud out of the way In my case it was remove the bottom 1/2 of the shroud. If you do not a split shroud, now is the time to get one from Jim K. or Bert and Faye.
2. Remove the fan clutch with the fan still attached.
3. Remove the fan belts.
4. Remove the pulley on the water pump.
5. Drain the radiator.
6. Remove the lower radiator hose from the coolant pump.
7. Remove the two heater hoses from the top of the pump.
8. Remove power steering pump and it's mounting bracket.
9. Remove the bracket going to the AC compressor.
10. Remove the 8 bolts holding the pump from the front of the engine. Some of the bolts are studs. You might want to memorize which holes they go back in to.
Reverse the above procedure and you are done.
I'm not happy. This is the second time I have had the center seal leak after a few years of use. I discussed this with Blaine and he thinks that the seals are binding or sticking to the shaft after being parked all winter. Then the first time I spin the pump in the spring the seal gets ripped. I do not know the fix to this problem but this time I'm going to try so water pump lubricant in the coolant.
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We went through a period arguments re water pump impeller size and what the impeller was made of. I've always felt that only bearing and seal design was worth arguing about. All the rest was meaningless.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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