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Leak from cooler in bumper?
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Posted 7/10/2014 2:26 PM
gelenda
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Date registered: Mar 2012
Location: Great Bay, New Hampshire
Vehicle(s): '03 G500, '16 E63S AMG, '15 Grand Cherokee Diesel
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Leak from cooler in bumper?

I noticed a leak coming from the driver side in the front of the truck. At first I thought it was the steering gearbox ($$$$ to replace from what I understand) but after looking into it some more, it seems the leak is coming from somewhere in the front bumper, near the oil cooler (?) located in the middle of the bumper. Whatever is leaking is making its way down the bumper into the same area as the power steering box. Is this cooler part of the power steering system or something else like the transmission?
#222831
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Posted 7/10/2014 2:42 PM
DUTCH
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Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
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RE: Leak from cooler in bumper?

If it's the one in the bumper, it cools he transmission. You should see ATF in the oil spot.
#222832 - in reply to #222831
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Posted 7/10/2014 2:57 PM
AlanMcR
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Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
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RE: Leak from cooler in bumper?

More likely the power steering return hose.  They get porous after a while.  Real cheap fix.
#222833 - in reply to #222831
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Posted 7/12/2014 2:22 AM
Otiswesty
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Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
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Re: Leak from cooler in bumper?

Yes. The return hose elbow for the power steering from the funny shaped tubular radiator in front of the main radiator and AC condenser.
#222872 - in reply to #222831
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Posted 7/19/2014 4:55 PM
gelenda
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Date registered: Mar 2012
Location: Great Bay, New Hampshire
Vehicle(s): '03 G500, '16 E63S AMG, '15 Grand Cherokee Diesel
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Re: Leak from cooler in bumper?

After taking off the front skid plate (thank God for cordless impact wrenches!), it's obvious the leak is in the elbow on the left side of the ATF cooler in the bumper. Seems that the left side is the supply ("in") side. The return/right side looks like it goes into the right side of the main radiator at the bottom and comes out the top and goes back into the transmission after that. I would appreciate it if someone could post a parts diagram of this system. I noticed the return line is in bad shape where it runs along the bottom of the main radiator, so I would like to replace that part of it as well (assuming I don't have to replace the entire line at once).


I wonder why they didn't include a dipstick for the transmission so I could check how much ATF actually leaked out. I'm sure it's no problem getting one from a dealer, but still, not very roadside emergency friendly....



Edited by gelenda 7/19/2014 5:30 PM




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#222981 - in reply to #222872
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Posted 7/20/2014 3:16 PM
gelenda
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Date registered: Mar 2012
Location: Great Bay, New Hampshire
Vehicle(s): '03 G500, '16 E63S AMG, '15 Grand Cherokee Diesel
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Re: Leak from cooler in bumper?

So I think I found the right parts diagram and need to replace parts 68 and 78 but I've never done this particular type of work before. Will I need any special tools to disconnect the fittings?



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#222991 - in reply to #222981
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Posted 7/27/2014 4:43 AM
elvis100
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Date registered: Nov 2013
Location: UK
Vehicle(s): 280GE, G350TD w/603 TD, classics, Airstream
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Re: Leak from cooler in bumper?

I'm told that it's very day to shear the nuts off the cooler at this point so go easy with a spanner. Lots of release spray and maybe some heat. Probably best to contain the heat/flame when working under there.
#223098 - in reply to #222831
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