Clean oil in coolant
02-04-2018, 04:36 AM
#1
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C63
Clean oil in coolant
Hi all, just noticed a thin layer of very clean oil in my coolant resovior .
it doesn’t use engine oil or coolant
the oil is definitely cleaner than the engine oil which makes me think it’s trans oil mixing with the coolant, I checked the trans oil and it’s not milky and looks normal.
any tips on where to look next ?
it doesn’t use engine oil or coolant
the oil is definitely cleaner than the engine oil which makes me think it’s trans oil mixing with the coolant, I checked the trans oil and it’s not milky and looks normal.
any tips on where to look next ?
02-04-2018, 01:30 PM
#2
I get that too. Judging by the color it's transmission fluid. The interesting thing is that I drain and replace the coolant mixture in the overflow tank every 9 months or so and some droplets appear quickly but it never really seems to get worse over time. My tech told me not to worry about it.
02-04-2018, 04:50 PM
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I get that too. Judging by the color it's transmission fluid. The interesting thing is that I drain and replace the coolant mixture in the overflow tank every 9 months or so and some droplets appear quickly but it never really seems to get worse over time. My tech told me not to worry about it.
if so where would I find it to repair/ replace?
02-05-2018, 09:26 PM
#4
I was told (by the chief tech at AMG Academy) that the transmission shares a cooler with the engine coolant and also has a separate cooler. There are certainly two oil coolers, one along the bottom middle of the car and the other in front of the right wheel, behind the fog light. The one on the side even has its own dedicated electric fan with venting into the wheel well and out of the side slats.
02-05-2018, 11:39 PM
#5
MBWorld Fanatic!
yes there is a transmission cooler in the radiator passenger side and the lines run just below the upper engine coolant hose. The cooler actually seals by having the lines tightened and pulling the cooler flush so if they are loose they could potentially leak into the radiator... or if you ever have the lines replaced or removed for any reason this could happen as well
02-06-2018, 08:02 AM
#6
Senior Member
I wouldn't recommend driving the car.
I'm pretty sure that coolant ended up in my gearbox and stuffed up the gearbox or torque converter quite badly.
I'm pretty sure that coolant ended up in my gearbox and stuffed up the gearbox or torque converter quite badly.
02-06-2018, 10:45 AM
#7
Were you checking your coolant level regularly? Over time mine stays at the same level (I've marked the reservoir with a black dot to easily and accurately check cold levels weekly) so whatever fluid exchange that takes place is of no consequence IMO.
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02-06-2018, 11:02 AM
#8
Super Member
kineran's advice is spot on. Anytime coolant and oil mix, one has a serious problem. If the source of the mixing is not investigated and repaired pronto, major damage will be incurred.
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kimeran (02-07-2018)
02-07-2018, 01:57 AM
#9
Senior Member
That caused the oil from the gearbox to mix with the coolant.
Upon first start up, I noticed the oil in my coolant bottle, and that was game over.
