Coolant Leak
Thread Starter
MBWorld Fanatic!
Joined: Oct 2002
Posts: 4,995
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From: Cincinnati
2010 E350 4Matic
Coolant Leak
I'm about to go out of town (6 h drive) so I'm looking over the engine and notice that the hose clamp on the water hose is looking like it is corroded green. I also notice that the green stain is sitting on the forward part of the oil pan and the backs of the serpentine pulleys. Anybody seen this before and know the cause? Looks like leaking hose but why would it start to leak out of the blue. The car is only 4 years old and only has 50K miles. I am waiting for it to cool off so that I can check the coolant level. Reading the threads it looks like if it is a hose it won't be covered under the extended warranty.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 4,260
Likes: 6
From: Philadelphia area
2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
Most likely just needs the hose clamps snugged up. Can't believe you have concerns about a hose being covered by warranty. They are inexpensive.
Thread Starter
MBWorld Fanatic!
Joined: Oct 2002
Posts: 4,995
Likes: 1,352
From: Cincinnati
2010 E350 4Matic
The hose clamps can't be snugged up. I took it to the dealer and they looked at it and said that they could'nt figure out without taking apart in order to check the pump and would replace the hose ($100 for the part $250 for the total cost of replacement) regardless of whether that was the problem. I went to the parts counter to ask about the hose and learned that there are two o-rings that seal the hose. I suspect that they are the source of the leak which I try replacing to see if that cures it.
Last edited by MBNUT1; May 16, 2010 at 11:01 AM.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 4,260
Likes: 6
From: Philadelphia area
2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
The hose clamps can't be snugged up. I took it to the dealer and they looked at it and said that they could'nt figure out without taking apart in order to check the pump and would replace the hose ($100 for the part $250 for the total cost of replacement) regardless of whether that was the problem. I went to the parts counter to ask about the hose and learned that there are two o-rings that seal the hose. I suspect that they are the source of the leak which I try replacing to see if that cures it.
