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  #1  
Old 06-16-2015, 03:13 PM
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Posts: 377
Leaking photo attached help please

I have a leak from the bundle of hoses in the center of the photo, under the air cleaner by the turbo. I wish I knew the name of it. I have checked Pellicanparts and see nothing like it in their parts catalog.



Is this something repairable with an O ring or a replacement. There look to be multiple hose clamps, I can't tell exactly where the leak is coming from.

Ideas please
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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 April 2018.
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  #2  
Old 06-16-2015, 07:42 PM
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Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,163
That is your auxiliary coolant pump

001-835-86-64

$305 from Pelican and no you can't order the internal o-ring separately.

I would first try to see if the hose clamps are all tight.

The air filter box is very easy to remove and then you have lots of room to work on the connections.

I would also check the junk yard for a replacement.
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2014 ML350 Bluetec (wife's DD)
2008 E320 Bluetec (my DD)
2008 ML320 CDI (Older son's college DD)
1998 E300DT (Younger son's college DD)
1987 300TD sold to vstech
----------
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
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  #3  
Old 06-16-2015, 08:11 PM
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Unless you live in a terribly cold climate and don't get enough heat out of the heater, you can simply remove the pump, insert a pipe to replace it, and tape off the electrical connection.
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  #4  
Old 06-16-2015, 08:16 PM
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Join Date: Jul 2004
Location: Barrington, RI
Posts: 5,381
x2 on living without the pump....mine doesn't work on the 98, I live in New England, and I don't miss it. Not a chance I'll ever replace it.
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06 E320 CDI "Benson", Platinum Blue, 173k mi, DD
91 300D "Otis", Smoke Silver, 127k mi, other DD
98 E300 "Murray", Silver, 125k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 237k mi (want to name it "Homer," wife won't let me)
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  #5  
Old 06-16-2015, 09:40 PM
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Join Date: Aug 2006
Posts: 377
Thanks to all.

I was able to get access and slightly tighten 3 of the 4 screws that hold the pieces together. I was also able to only slightly tighten up the 2 larger clamps.

If it still leaks I will take it apart and examine the parts.

If I bypass the pump, it is obvious that I connect the large hoses together. What do I do with the smaller hose and where does it go?
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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 April 2018.
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  #6  
Old 06-17-2015, 06:24 PM
Control Freak
 
Join Date: Oct 2011
Location: Columbia, SC
Posts: 3,163
The small hose is the heated washer fluid loop. Washer heater is in parallel with the cabin heater so you'll need to find the other end to cap off as well.
__________________
2014 ML350 Bluetec (wife's DD)
2008 E320 Bluetec (my DD)
2008 ML320 CDI (Older son's college DD)
1998 E300DT (Younger son's college DD)
1987 300TD sold to vstech
----------
gone but living on
1983 240D (body to greazzer, engine to t walgamuth)
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  #7  
Old 06-20-2015, 08:37 PM
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Join Date: Aug 2006
Posts: 377
Update

Thanks for all your help Jay_Bob.

I took the pump out today, disassembled it, cleaned it up and hit it with brake cleaner. It was not obvious where the leak is from.

I reassembled it with red high temperature silicone gasket maker. Hopefully I did not use too much and glue the pump rotor solid.

It is not leaking after a couple of runs bringing the temperature up to 80 degrees operating temperature. So far so good. If it leaks again I will likely go aftermarket from ebay MotorKing for $61.95

It is so easy to R&R it could easily be replaced or bypassed on the road.
__________________
1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 April 2018.
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