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2015 GL63 AMG coolant tank overflowing for no reason
Hello, I have fixed many leaks and had the water pump replaces a year ago. Ever since the water pump got replaced, my coolant tank will randomly empty out one liter of coolant out of the over flow hole (no tube) on the the front right tire. I will fill it and it will stay dry for a day or two. Then I drive it for 5 miles and the low coolant light came on and the entire wheel well is wet and I'm down one liter of coolant. After cooling down, I will top it off and it will stay full for many miles and a few days and then randomly do it again in a short amount of miles. I will fill it again and it will last a day or to again. My mechanic can't seem to solve the mystery. I'm hoping some here has seen this before. Note, no leaks anywhere else. Sorry for the large photos. Leaking off the wheel to ground and all down the side of the vehicle while driving Leaking off the tire to wheel once parked Spraying onto the wheel Well from tire while driving
Last edited by MX Junky; Apr 18, 2024 at 04:50 PM.
Well, My mechanic change the temperature sensor and $600 dollars later no change. Now we come to find out there is three radiators on this vehicle and an expert MB tech instructor believes that the system must be blead and it won't self bleed. I sure hope this it the case since I'm already $1,500 into this.
I had no issues other than it being a total PIA changing the radiator on my 63. The system bled itself. If you do it, make sure you buy the right one. Like they said, there are three and multiple types and parts revisions. Figured the MB unit sucked so I purchased the cheapest one I could find on Ebay. Seems to be as good or better than the OE. Can't get worse than what they put in the car since they all seem to fail around 100k miles. The radiator for coolant is behind the fan and in front of the condenser. The condenser rides piggyback on the radiator, so it is a two-person job to get everything to line up.
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