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11-04-2018, 01:33 PM
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#15
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Senior Member
Tiffin Owners Club
Join Date: Mar 2015
Location: Southern NM
Posts: 2,514
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2005 Allegro Bay
38,000 miles
Original water pump, with Dexcool coolant 
__________________
2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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11-04-2018, 07:11 PM
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#16
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Registered User
Join Date: Jul 2013
Location: Somerset, Ky
Posts: 256
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Quote:
Originally Posted by lonfu
i've had problems with the 5 year coolant eating rubber gaskets. So I switched to the green basic stuff. 140k and 20 years on water pump. change it about every 5 years or so.
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Me to I changed over to the regular green antifreeze on advice from local radiator repair shop and Brazels RV
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11-06-2018, 11:54 AM
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#17
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Senior Member
Join Date: Oct 2015
Location: northeast florida beach
Posts: 269
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GM LS water pumps
are designed to be 150K units I am told.........mine in my pickup went at 145K.
WP on 8.1L in motorhome only has 50K on it.
__________________
Florida Scott 
2001 R Vision M242 25' 8.1L GM Workhorse
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11-06-2018, 05:43 PM
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#18
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Junior Member
Join Date: Jul 2017
Location: S. OR/ N. CA on the coast
Posts: 14
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Quote:
Originally Posted by boatman10
are designed to be 150K units I am told.........mine in my pickup went at 145K.
WP on 8.1L in motorhome only has 50K on it.
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We have 86k on our 2001 Trek 8.1. Still original pump but flush and change dex-cool per maintenance schedule.
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Steve & Cheryl
Chalet Arrowhead
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11-07-2018, 05:01 AM
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#19
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Senior Member
Join Date: Oct 2015
Location: northeast florida beach
Posts: 269
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oh i forgot
my buddy's went at 255K and 14 years on his LS engine truck.....and the way he is I doubt he ever replaced the antifreeze.........
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Florida Scott
2001 R Vision M242 25' 8.1L GM Workhorse
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11-07-2018, 11:28 AM
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#20
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Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Oct 2004
Location: Scottsdale, AZ
Posts: 1,502
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105k: replaced pump (was still good). Time was right for removal while working on compressor, bypass hose, belts and tensioner pulleys, radiator-pack-fin flush, and shroud modifications. Water pump seems to be in excellent shape. Dex cool on 3-4 year change and 35/65 mix.
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2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..
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07-08-2019, 09:33 AM
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#21
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Senior Member
Newmar Owners Club Winnebago Owners Club Freightliner Owners Club
Join Date: Mar 2016
Location: Kingman Az
Posts: 1,686
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Quote:
Originally Posted by lonfu
i've had problems with the 5 year coolant eating rubber gaskets. So I switched to the green basic stuff. 140k and 20 years on water pump. change it about every 5 years or so.
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I need to specify, I change the coolant every 5 years or so. I still have the original engine water pump on the engine....
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May your black water hose never break!
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07-09-2019, 04:38 AM
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#22
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Senior Member
Join Date: Jul 2018
Location: NC
Posts: 234
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38k on original
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2004 Monaco Lapalma PDT W-22, 8.1
FSE Industrial Ceramic Kilns.
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07-10-2019, 07:39 AM
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#23
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Senior Member
Join Date: Feb 2005
Location: Chesapeake, Va.
Posts: 282
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02 Adventure with 63K miles, I do travel with a new pump
and the upper rad. hose with the goose neck and stat.
I do need to take the back off the new pump to see that
it has the correct number of blades.
Now do I remember the correct number of blades, NO!
Does 8 sound about right?? ....anyone??....coopcolt
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07-11-2019, 05:21 AM
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#24
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Senior Member
Join Date: Nov 2013
Posts: 5,778
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Quote:
Originally Posted by coopcolt
02 Adventure with 63K miles, I do travel with a new pump
and the upper rad. hose with the goose neck and stat.
I do need to take the back off the new pump to see that
it has the correct number of blades.
Now do I remember the correct number of blades, NO!
Does 8 sound about right?? ....anyone??....coopcolt
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What is the part number? Hub height is very important.
__________________
2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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07-11-2019, 06:08 AM
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#25
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Senior Member
Join Date: Feb 2005
Location: Chesapeake, Va.
Posts: 282
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The box, with the number went away long ago.
I checked and cross checked the number seven ways
from sunset when I purchased the pump.
The pump did come in a Delco box, course I realize
that does NOT guarantee anything.
Their is a casting # 1589C on the pump, most likely
means nothing as to what it may fit.....coopcolt
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07-11-2019, 06:22 AM
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#26
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Senior Member
Join Date: Feb 2005
Location: Chesapeake, Va.
Posts: 282
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Checking my cheat sheet book, I found the # I most
likely used 12558870, Rock Auto $97.00.
Now this was most maybe 4/5 yrs. ago.
Also found 251-693, that may cross to the above #
coopcolt....
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07-11-2019, 06:26 PM
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#27
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Senior Member
Join Date: Nov 2013
Posts: 5,778
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Quote:
Originally Posted by coopcolt
Checking my cheat sheet book, I found the # I most
likely used 12558870, Rock Auto $97.00.
Now this was most maybe 4/5 yrs. ago.
Also found 251-693, that may cross to the above #
coopcolt....
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Below is my long thread on the correct water pump part number. As an aside, the first pump I bought from RockAuto failed in two months. They would not honor the warranty because they said ACDelco doesn’t list the pump for a Workhorse application. Bought the same pump from Amazon and that one has been fine to date. Kevin’s first pump failed rather quickly as well, and he ended up having Amazon provide a replacement under warranty.
http://www.irv2.com/forums/f22/water...-a-404231.html
__________________
2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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07-11-2019, 07:00 PM
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#28
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Senior Member
Join Date: Feb 2005
Location: Chesapeake, Va.
Posts: 282
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Checked my book again, AC Delco pump # 252-783, with a
NAPA pump # 41036.
Gates pump #88926735.
As I can best remember, they were many pumps/numbers
but we wanted the one with the most vanes, seems to me
we wanted 8 vanes.
Do I remember that from the video from the gentleman
in Somerset, KY............coopcolt
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