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#1
04-06-2007, 07:57 PM
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Aux coolant pump doesn't work
Well, I don't think it does. I unplugged it and connected it directly to 12v. Nothing happens. I connected the leads both ways, nothing. The resistance across the pump is about 3.5 ohms. Anyone know what its supposed to be?
What prompted this is the temp gauge would climb a little at rest or driving slowly (I know this may not be the aux pump, but I mention it anyway), and the heat kiss arse on the highway but is so-so in town. So can you rebuild these pumps or am I stuck getting a new one? Thanks, -Geoff
__________________
1985 300TD-euro 352,000 mi 1974 240D (1?)52,000 mi - has a new home now 
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#2
04-06-2007, 08:16 PM
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Pizza
If there is resistance across the motor terminals, the rotor may be stuck. Take it apart and see what is wrong with it. Its also possible that the motor is burned out from the rotor being stuck. P E H
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#3
04-06-2007, 08:17 PM
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I just measured a brand new pump and got 20 ohms between the leads, I assume that's correct. I don't know if they can be rebuilt, but I'm sure someone here has tried.
I doubt the pump will affect engine temperature, but it will definitely explain the lack of low rpm heat.
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#4
04-06-2007, 08:24 PM
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Pizza,
Comparing your resistance reading to Craigs reading on a new pump, I think your motor is burned out and U will have to replace pump. Seems like I saw them for about $135. One more thing, did the terminals spark when U connected the motor terminals to 12 volts? P E H
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#5
04-06-2007, 08:30 PM
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I just found it for $74.50, PM me for info if your interested.
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#6
04-06-2007, 08:42 PM
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Check this link
__________________
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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#7
04-06-2007, 08:47 PM
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I picked up a spare at Pull and Save for a couple of dollars. I read somewhere that they can be disassembled and freed up.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#8
04-06-2007, 09:19 PM
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I did get a small spark at the battery post when I touched the wire there (I had jumpers with aligator clips on the pump electrical connection).
The first time I check resistance, it was around 18 ohms. Then I tried running it a few times, then checked resistance again, and that's when I got the 3.5 ohms. Nice rehab tutorial. I'll have to save that for a day when I don't need the car for a little while. Or maybe I'll look for a used one. Thanks for the help all...if all else fails, I'll hit you up for that one you found Craig. Thanks. -Geoff
__________________
1985 300TD-euro 352,000 mi 1974 240D (1?)52,000 mi - has a new home now
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