M157 Water Pump question
Thread Starter
Junior Member
Joined: Jun 2023
Posts: 72
Likes: 10
2017 GLS 63 AMG
M157 Water Pump question
Gents
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Junior Member
Joined: Dec 2019
Posts: 19
Likes: 5
Gl63 amg
Gasket
Gents
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Super Member
Joined: Jun 2025
Posts: 784
Likes: 248
From: USA
Gents
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Currently planning to gather the required parts for the Water Pump / Thermostat / Turbo coolant lines replacement.
Going through the part list, I have a question. Does the Water Pump sold online at dealerships (A157200010764) does include the water pump gasket? or should I buy it separatelly?
Thanks in advance
David
Thread Starter
Junior Member
Joined: Jun 2023
Posts: 72
Likes: 10
2017 GLS 63 AMG
I will throw the turbo coolant lines in the mix.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
For my car...the heat soak goes up PARKED. While driving the temps are good. I have no idication of a head gasket issue...if I leave the hood open when parked, no heat issues. Hood down? I lose coolant.
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
I am guessing you see the radiator leaking or it was pressure tested for flow? I did mine at about ten years but I honestly dont remember why at this time, maybe a leak at a side seam. Fortunately radiators are a quick 1 hour diy. hopefully your all settled after this.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
@Baltistyle I had it "fixed" some time ago with all the hoses replaced. It came back as a 'leak' at the intersections of the tubing under the aux coolant pump. We replaced the pump and then noticed a crack in the radiator on the driver side of the car.
The theory is heat soak when parked. According to my guys there is no sign of a bad head gasket...that said, I think that once I saw white smoke at FOT, but, cant verify that.
The temps parked will sit at 212 (oil) and 200 water. On the button, no matter how hard I drive. On occasion the oil will go 215 or so but only for a moment after pushing the car.
The theory is heat soak when parked. According to my guys there is no sign of a bad head gasket...that said, I think that once I saw white smoke at FOT, but, cant verify that.
The temps parked will sit at 212 (oil) and 200 water. On the button, no matter how hard I drive. On occasion the oil will go 215 or so but only for a moment after pushing the car.
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From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
@Baltistyle So went out and made this quick vid....I am not so sure the coolant is supposed to move like that in the larger tank.
Other car
Other car
Last edited by OldManAndHisCar; Dec 9, 2025 at 09:54 AM.
MBWorld Fanatic!
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
@Baltistyle So went out and made this quick vid....I am not so sure the coolant is supposed to move like that in the larger tank.
https://youtube.com/shorts/nEbgSCcuAIE?feature=share
Other car
https://youtube.com/shorts/FGs8X8uSBrs?feature=share
https://youtube.com/shorts/nEbgSCcuAIE?feature=share
Other car
https://youtube.com/shorts/FGs8X8uSBrs?feature=share
What I have found is it depends if the circuit is open or not. Ive seen this in multiple vehicles ive owned. For instance it would be still upon startup and start to move when the pumps activate or the thermostat is open.
I have not started my 63 in a few weeks so would be happy to check at start up and once it gets some heat to it for comparisons sake. Its an overflow tank but in circuit vs passive overflow tanks on many cars.
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
2013 e63 p30 split cooling
Likely not driving today but that shows a small bypass when in the startup circuit and I expect more if warm and tstat is open.
Last edited by Baltistyle; Dec 11, 2025 at 11:24 AM.
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From: Baltimore County, MD
'13 s212 63 p30. '06 LX470
