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  #1  
Old 11-14-2006, 07:31 PM
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Coolant Auxiliary pump

After replacing the stat and achieving the ideal operating temp, my heat still not up there. So, tested the aux pump by disconnecting it and applying 12v power from battery. Every time I connect (either polarity), I hear a light thunk. I expect to hear a wrrrrrr sound if its running. This tells me that its probably seized. Do you agree? What is the life expectancy on these pumps anyway?

I am wondering if it can be un-seized? Has anyone ever tried taking one of these off and opening them up to see whats making them stuck?

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Last edited by tobybul; 11-15-2006 at 04:51 PM. Reason: add more
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  #2  
Old 11-14-2006, 08:04 PM
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If its the original it has probably seized by now, install a fuse in the cord to the pump to save the CCU from burning up (a seized motor draws way more juice than a running one...a la torched circuit board), my pump is on its way out (sqeals on occassion, but has been running ok lately...) I have a spare on hand for when it does finally die/blow my fuse, I installed a 1A fuse and holder in the cord from the pump itself, cost about $4 at radioshack, way less than a $400 CCU! .

Opening the pump will only show you how coroded/dead it is, not worth it, find a used (or new) one somewhere.

Yes it should whir when power is applied...
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  #3  
Old 11-14-2006, 09:23 PM
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Can I just disconnect the power (unplug it at the connector) for now?
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
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84 Cressida
82 Vanagon
80 Fiesta
78 Nova
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Contessa
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  #4  
Old 11-14-2006, 09:31 PM
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I unplugged mine with no ill affects. Still have great heat too.


85 300td
85 300d
83 300d
81 240d
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  #5  
Old 11-14-2006, 09:35 PM
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Hi

I have a Euro model that doesn't even have an aux. water pump. Can anyone reccommend a cheaper replacement pump that I could put in?? I have good heat also, I just want one for use with a WVO system.

Peter
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  #6  
Old 11-14-2006, 09:43 PM
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The aux water pump was added to the climate control system in response to whining from customers who said the heater didn't put out enough heat at low engine speeds (i.e., around town, low speeds, lots of sitting at traffic lights, cold weather, etc.). The main water pump doesn't send enough hot water through the heater core, apparently. I suggest removing the aux pump and replacing it with a short piece of copper pipe. If your heater still keeps you warm in your climate and style of driving, forget about replacing the pump.
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  #7  
Old 11-14-2006, 09:53 PM
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The junkyard is full of 'em. I pulled one from an old Audi 5000 turbo to use on a Vanagon/VR6, the Volkswagen VR6 also used 'em, but they are a slightly larger hose connection and different wire-plug. Mercedes of course uses their own plug, not difficult to graft if you're looking to repair on the cheap. I got my spare from a 190E, same pump as the diesel and there are lots of 190Es around.

- Jeff
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  #8  
Old 11-14-2006, 10:00 PM
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Quote:
Originally Posted by Jeremy5848 View Post
..... I suggest removing the aux pump and replacing it with a short piece of copper pipe. If your heater still keeps you warm in your climate and style of driving, forget about replacing the pump.
I thought of doing the same thing... might be worth a try... while i check the pump...
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97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
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87 Camry
84 Cressida
82 Vanagon
80 Fiesta
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  #9  
Old 11-14-2006, 10:11 PM
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Aux pump

For the true tinkerer... you can open it up by removing the 2 long little bolts and pull the steel housing that contains the magnets off the white plastic armature/brush assy....leave the front part alone....there are actually replaceable brushes mounted in the white plastic piece that the main steel body attaches to....I just rebuilt mine....will have to see how it holds up....mainly concerned how watertight the shaft seal is now....
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  #10  
Old 11-14-2006, 10:17 PM
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Quote:
Originally Posted by yellit View Post
For the true tinkerer... you can open it up by removing the 2 long little bolts and pull the steel housing that contains the magnets off the white plastic armature/brush assy....leave the front part alone....there are actually replaceable brushes mounted in the white plastic piece that the main steel body attaches to....I just rebuilt mine....will have to see how it holds up....mainly concerned how watertight the shaft seal is now....
Are the brushes pretty standard size? Can you get em anywhere?

Also, am I understanding you to say that you left the pump portionin place and found a way to remove just the motor from the car, or did you remove the entire assembly?
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa
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  #11  
Old 11-14-2006, 10:55 PM
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pump...

This is a used pump that is out of a vehicle...the brushes are just small alternator size brushes ....I just file close ones down for a good fit...They are very close to my 89 Mitsu 4WD pickup truck alternator brushes....about 3 bucks at auto parts stores....there was rust & scale inside the steel housing that I cleaned out and it was very slow before the rebuild...after the cleaning and lubeing it spins great now....had about 3/4 of the orig. brushes left so i left them on...but I have the new ones for next time if this thing pumps without leaking.....
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  #12  
Old 11-14-2006, 11:01 PM
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How to disassemble aux water pump-part 1
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  #13  
Old 11-15-2006, 12:18 PM
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price just got a bit cheaper.....

0130002070 Bosch
Water Pump; Electric Auxiliary Water Pump $74.47 New!!! Half of what everyone else wants...
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth...
2007 Honda Accord EX
2007 Honda Accord SE V6
96 C220
97 Explorer - Found Another Home
2000 Honda Accord V6 - Found Another Home
85 300D - Found Another Home
84 300D - Found Another Home
80 300TD - Found Another Home
Previous cars:
96 Caravan
87 Camry
84 Cressida
82 Vanagon
80 Fiesta
78 Nova
Ford Cortina
Opel Kadet
68 Kombi
Contessa
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  #14  
Old 11-15-2006, 12:47 PM
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From where?
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  #15  
Old 11-15-2006, 12:59 PM
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fill the pump motor with ATF(wonderful stuff)let it sit overnight and drain thoroughly.try turning the shaft with a pair of pliers.easy does it!once you get it turning attach to 12v and see if it runs

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