2017 E63s Coolant leak and Trans temp overheating
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2017 E63s Coolant leak and Trans temp overheating
Hello all
I currently have a 2017 E63s which has recently started giving some problem's. I don't if both of the issues are linked, I would guess they are, but if anyone can point me in the right direction please then that would be much appreciated.
On the last few outings in the car i noticed the radiator fans would not go off, despite engine coolant temp staying normal. I was driving the car hard at the time and also noticed the Transmission temperature gauge had just gone into the red. So I stopped and turned the car off. I noticed the coolant in the big tank at the front of the engine was at normal level so wasn't sure why the fans were not going off.
A bit of further investigation and I noticed the coolant tank at the bank of the engine, under the engine cover, was empty!
Filled this up and drove home at a normal pace with no problems. A few days later and the very same thing happened after a bit of hard driving. So now I've parked the car up with no driving. The rear coolant tank was empty again and the Trans temp went into the red again.
I just wanted to know what this coolant tank feeds as there are no signs of a leakage under the car? Is it sending water to a specific radiator, Intercooler or the Turbos? And is the Trans overheating linked to this, can't see the Trans being water cooled.
Is there any tests I can run on the car to determine where the leak is?
Thanks for the help.
I currently have a 2017 E63s which has recently started giving some problem's. I don't if both of the issues are linked, I would guess they are, but if anyone can point me in the right direction please then that would be much appreciated.
On the last few outings in the car i noticed the radiator fans would not go off, despite engine coolant temp staying normal. I was driving the car hard at the time and also noticed the Transmission temperature gauge had just gone into the red. So I stopped and turned the car off. I noticed the coolant in the big tank at the front of the engine was at normal level so wasn't sure why the fans were not going off.
A bit of further investigation and I noticed the coolant tank at the bank of the engine, under the engine cover, was empty!
Filled this up and drove home at a normal pace with no problems. A few days later and the very same thing happened after a bit of hard driving. So now I've parked the car up with no driving. The rear coolant tank was empty again and the Trans temp went into the red again.
I just wanted to know what this coolant tank feeds as there are no signs of a leakage under the car? Is it sending water to a specific radiator, Intercooler or the Turbos? And is the Trans overheating linked to this, can't see the Trans being water cooled.
Is there any tests I can run on the car to determine where the leak is?
Thanks for the help.
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Joined: Dec 2019
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From: Sacramento
2019 E63S AMG
The 2017 and 2019 are both W213 have the same cooling system. There is a dual radiator system. If you take a rock strike to the one that cools the transmission fluid the main coolant temp will be normal but the transmission fluid temperature will rise abnormally especially if the A/C is used. The two radiator systems do not share the same coolant which is the reason the main coolant temp can be normal and the transmission fluid is elevated.
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2020 E63s AMG Wagon, 2014 SL63 AMG, 2019 Audi Q8
OR it could be coolant leaking into the engine due to faulty cylinder head bolts which was an infamous flaw in cars like my 2009 SL63 for which Mercedes never issued a recall and caused many blown engines. How they were never held to task is beyond me. Good luck.
Joined: Jul 2006
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From: Seattle
'19 E63S, ‘16 CLS63 RIP, '09 E63 Gone, '06 M5 Gone, '97 Supra TT Gone
I would guess it’s a rock strike before anything else. Check your radiators and look for a leak. If you’re not seeing coolant leaking but it’s disappearing anyway definitely get it to a mechanic on a flatbed and check the oil for the milkshake of death.
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From: NYC
AMG
Transfer case and Trans heat exchanger are both cooled via the low temperature cooling system tied to the turbo IC cooling. (as is the ECU)
This is why your trans is heating when the tank is empty.
This is why your trans is heating when the tank is empty.
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From: UK
S55K AMG
My apologies for not updating this earlier but I've not really had the time to drive the car or take it anywhere to have it checked out.
But recently I have done the following:
1. Had the coolant system pressure tested. Held pressure no problem so highly unlikely a leak is present.
2. With the above I changed the caps from both the coolant tanks just incase there was a problem with a seal. Later found to have no problems here either.
3. Checked the oil for mixture and the "milkshake of death " as suggested above. Luckily there is no mixing of oil and water.
So most things can be ruled out here, must be something else.
But recently I have done the following:
1. Had the coolant system pressure tested. Held pressure no problem so highly unlikely a leak is present.
2. With the above I changed the caps from both the coolant tanks just incase there was a problem with a seal. Later found to have no problems here either.
3. Checked the oil for mixture and the "milkshake of death " as suggested above. Luckily there is no mixing of oil and water.
So most things can be ruled out here, must be something else.
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S55K AMG
Took it for another blast last night to see if I could get it to a high enough temperature and see what happens.
Trans temp went to 116°C (it goes into Red at 120°C) and 2 things were clearly observed.
1. Car seemed to lose some power and I felt some vibrations, along with some "puttt-puttt-puttt" noises coming from the back end i thought.
I slowed down as i thought the engine MIGHT have given up altogether. The car seemed to drive fine under normal circumstances but there was quite a distinct loss of power along with the noise at the back. The car was in "Sport+" mode but it might aswell have been in "Comfort" or something even less for the amount of power it was putting out.
2. I pulled in to the next gas station and checked the coolant in the little coolant tank. Low and behold it was all wet at the top and the sides. So no leaks as suspected earlier, just the coolant is coming out from the top under high pressure.
Trans temp went to 116°C (it goes into Red at 120°C) and 2 things were clearly observed.
1. Car seemed to lose some power and I felt some vibrations, along with some "puttt-puttt-puttt" noises coming from the back end i thought.
I slowed down as i thought the engine MIGHT have given up altogether. The car seemed to drive fine under normal circumstances but there was quite a distinct loss of power along with the noise at the back. The car was in "Sport+" mode but it might aswell have been in "Comfort" or something even less for the amount of power it was putting out.
2. I pulled in to the next gas station and checked the coolant in the little coolant tank. Low and behold it was all wet at the top and the sides. So no leaks as suspected earlier, just the coolant is coming out from the top under high pressure.
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S55K AMG
The only problems I've had in the past that MAY be linked to this is the exhaust flaps bringing up error codes for being stuck. I believe this to be a common fault with the E63's from what I have read in other places.
But would the exhaust flaps cause the any kind of pressure build up in the coolant systems? Or am I over thinking this.
The noises coming from the back of the car seems to suggest a failure of the flaps, either on one side or possibly both sides. Can they be removed/deleted/cut out etc etc.
Thanks
But would the exhaust flaps cause the any kind of pressure build up in the coolant systems? Or am I over thinking this.
The noises coming from the back of the car seems to suggest a failure of the flaps, either on one side or possibly both sides. Can they be removed/deleted/cut out etc etc.
Thanks
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E63S 4MATIC 213
i had the same problem the trans rad was punctured by a stone which ran it dry went into Mercedes a few times couldn't find a fault! changed dealership they luckily found the issue new trans rad and cooling pump has been fine since this has been done running around 80ish degrees Celsius when driving hard
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Took it for another blast last night to see if I could get it to a high enough temperature and see what happens.
Trans temp went to 116°C (it goes into Red at 120°C) and 2 things were clearly observed.
1. Car seemed to lose some power and I felt some vibrations, along with some "puttt-puttt-puttt" noises coming from the back end i thought.
I slowed down as i thought the engine MIGHT have given up altogether. The car seemed to drive fine under normal circumstances but there was quite a distinct loss of power along with the noise at the back. The car was in "Sport+" mode but it might aswell have been in "Comfort" or something even less for the amount of power it was putting out.
2. I pulled in to the next gas station and checked the coolant in the little coolant tank. Low and behold it was all wet at the top and the sides. So no leaks as suspected earlier, just the coolant is coming out from the top under high pressure.
Trans temp went to 116°C (it goes into Red at 120°C) and 2 things were clearly observed.
1. Car seemed to lose some power and I felt some vibrations, along with some "puttt-puttt-puttt" noises coming from the back end i thought.
I slowed down as i thought the engine MIGHT have given up altogether. The car seemed to drive fine under normal circumstances but there was quite a distinct loss of power along with the noise at the back. The car was in "Sport+" mode but it might aswell have been in "Comfort" or something even less for the amount of power it was putting out.
2. I pulled in to the next gas station and checked the coolant in the little coolant tank. Low and behold it was all wet at the top and the sides. So no leaks as suspected earlier, just the coolant is coming out from the top under high pressure.
If you left it sit for a long while, sis you notice any puddles of coolant where it sat?
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S55K AMG
I had these checked at a Mercedes specialist with a Star Machine and he did an actuation test on all 3 pumps. 2 ran fine, but the 3rd one ran for a few seconds and then stopped. Then ran for a few more seconds and then stopped altogether.
The car is going into the main Mercedes dealers tomorrow to have this pump replaced. Hopefully this will cure it and no more problem's. But if this doesn't solve it then its back to Square one.
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Which system did you have tested? Sounds like you had the engine coolant system tested. This is seperate to the IC circuit, which also serves to cool the trans. The IC heat exchanger is front centre for rock strikes. It is a common issue. As has been said before, check this. Your engine coolant has nothing to do with transmission. However your car won't be happy with your intercoolers not performing.
If you left it sit for a long while, sis you notice any puddles of coolant where it sat?
If you left it sit for a long while, sis you notice any puddles of coolant where it sat?
Dont worry, I had the IC circuit tested, thats the one that was losing water. The pressure held fine for approximately 15 minutes, no leaks underneath or any drop in coolant level.
I'm hoping its one of the pumps on the IC circuit as has been diagnosed by a specialist. I guess I'll find out by tomorrow evening or Friday.
