Coolant loss..Where is it going?
10-22-2020 | 07:29 PM
#1
Thread Starter
Senior Member
Joined: Dec 2013
Posts: 303
Likes: 33
From: New York
2010 CL550
Coolant loss..Where is it going?
2010 CL550 4matic, m273 engine, 130k miles..runs great, but lately coolant low message comes and goes sometimes when taking a curved ramp at decent speed. Now today it came on as soon as I started the car. Obviously added some coolant to the correct level and will update. As for now, there are no leaks anywhere, that I can see..should I be scared?
Last edited by COUPCONNOISSEUR; 10-22-2020 at 07:32 PM.
10-22-2020 | 11:35 PM
#2
Super Member
Joined: May 2019
Posts: 671
Likes: 280
From: Omaha, NE
2007 S600
Scared? Probably not. Have you added coolant just once, or more than once? If once, then watch and see what happens. If more than once... you have a leak somewhere that needs to be found.
I got under mine and found evidence of the coolant leak I had been chasing. It would only lose coolant overnight after driving it, or so it seemed. But, there was evidence of a leak under the driver side turbo. A $7 O-ring and several hours of work fixed it. That was just my situation. There are dozens of places leaks can occur, some trivial and some catastrophic. Just do some basic troubleshooting and observation. That blue coolant generally leaves ample evidence of where it’s been leaking.
I got under mine and found evidence of the coolant leak I had been chasing. It would only lose coolant overnight after driving it, or so it seemed. But, there was evidence of a leak under the driver side turbo. A $7 O-ring and several hours of work fixed it. That was just my situation. There are dozens of places leaks can occur, some trivial and some catastrophic. Just do some basic troubleshooting and observation. That blue coolant generally leaves ample evidence of where it’s been leaking.
10-23-2020 | 08:19 AM
#3
Thread Starter
Senior Member
Joined: Dec 2013
Posts: 303
Likes: 33
From: New York
2010 CL550
Scared? Probably not. Have you added coolant just once, or more than once? If once, then watch and see what happens. If more than once... you have a leak somewhere that needs to be found.
I got under mine and found evidence of the coolant leak I had been chasing. It would only lose coolant overnight after driving it, or so it seemed. But, there was evidence of a leak under the driver side turbo. A $7 O-ring and several hours of work fixed it. That was just my situation. There are dozens of places leaks can occur, some trivial and some catastrophic. Just do some basic troubleshooting and observation. That blue coolant generally leaves ample evidence of where it’s been leaking.
I got under mine and found evidence of the coolant leak I had been chasing. It would only lose coolant overnight after driving it, or so it seemed. But, there was evidence of a leak under the driver side turbo. A $7 O-ring and several hours of work fixed it. That was just my situation. There are dozens of places leaks can occur, some trivial and some catastrophic. Just do some basic troubleshooting and observation. That blue coolant generally leaves ample evidence of where it’s been leaking.
10-23-2020 | 08:51 AM
#4
MBWorld Fanatic!
Joined: Oct 2012
Posts: 1,381
Likes: 297
CLK55 W209, CL63 W216
Take a close look at the engine oil and other obvious signs you should be worried about. Otherwise I would start with the usual suspects that are easily accessible like the radiator and hoses etc. If you have a slow leak it’ll be hard to find as it gets blown all over as you drive, sometimes leaving no evidence behind. 7 months is a very slow leak if you ask me.
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10-23-2020 | 12:33 PM
#6
Thread Starter
Senior Member
Joined: Dec 2013
Posts: 303
Likes: 33
From: New York
2010 CL550
10-23-2020 | 12:43 PM
#7
Out Of Control!!
Joined: Sep 2018
Posts: 13,555
Likes: 4,043
From: unbegrenzt
2017 GLE350 4MATIC
Keep an eye on the coolant. Only two possibilities:
- external loss (leak)
- internal loss (consumption)
External losses eventually should all be visible with careful and prolonged inspection.
Internal losses can be found first of all by noticing exhaust pipe smell, bubbles in coolant reservoir while engine running and oil sludge the color of milk chocolate.
- external loss (leak)
- internal loss (consumption)
External losses eventually should all be visible with careful and prolonged inspection.
Internal losses can be found first of all by noticing exhaust pipe smell, bubbles in coolant reservoir while engine running and oil sludge the color of milk chocolate.
