Our of coolant regularly
- Thread starter Riva811
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Nightmage
Member
I would echo this, how long does it take for the coolant to disappear? If it's less than a couple of days then that's far too much to be leaking only into the engine, your engine would have blown up by now plus it's also much more common for the coolant to be leaking elsewhere. Have you checked for damp patches under your car when you park it? Also try running it for a few minutes and then look under the car, you might see where it's leaking from.
If it takes longer to leak away then open the oil cap and see if it's oil coloured (either golden or black), if it's milky white then coolant might be mixing with the oil and creating a frothy emulsion and then that might be a much bigger job / sell the car.
OP
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Riva811
Active Member
Hi it takes roughly 2 to 3 weeks.
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Riva811
Active Member
The car had no issues before. Radiator cracked, MB replaced it for 1100, car is out of coolant ever few weeks
grober
MB Master
WONDER IF YOUR CHARGE AIR HEAT EXCHANGER DOES HAVE A LEAK. if so its a major job to swap it.
mercedes.7zap.com
CHARGE AIR COOLER WITH WATER CIRCUIT MERCEDES CL-KLASSE [Car] [CHASSIS] (EUROPA)
CHARGE AIR COOLER WITH WATER CIRCUIT MERCEDES CL-KLASSE [Car] [CHASSIS] (EUROPA)
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- AMG Line Premier Plus Estate C220d
What about the plastic water pump...prone to leak when hot...no evidence when cold...pressure test should find the fault
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- 2022 Hyundai IONIQ 5 RWD / 2016 Suzuki Vitara AWD
How many times did you top it up so far? Perhaps they didn't fill up the system properly and left air in the system?
Either way, a coolant loss problem that started after they swapped the radiator, and they wash their hands off it... not very professional IMO.
Nightmage
Member
Still quite quick. If you can't see a leak and you aren't that attached to it, I'd say trade it in at Brentford, if they think the car is fine let them offer you top dollar for it
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Riva811
Active Member
I tried to book online for diagnosis but because I already complained twice I am asked to call. Called up and I said I want to book a coolant leak diagnosis, guy asked me if I wanted to take it to brentford - i said no way they are crap. Long story short, MB specialist from road side assistance came over. Hooked star diagnosis and the car has 0 faults. Filled up the tank and pressure tested it - not losing pressure. Also had a look if the engine is full of coolant, checked the engine oil, everything clean. We did notice a splatter pattern from the center of the engine. My thinking it is a cracked seal somewhere, probably in the thermostat housing as it seems to fail often. She suggested I either get it to an indie to let it run for hours on the platform to see where the leak is coming or book it with MB Brooklands as they are way better for performance models.
I will book it with them and say if you cant figure out where the leak is then i am not paying you any diagnosis money.
I will book it with them and say if you cant figure out where the leak is then i am not paying you any diagnosis money.
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Riva811
Active Member
The vehicle was topped up twice after the radiator replacement. Their suggestion was to keep topping it up. I doubt the tank can be totally empty due to air pockets.
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- Jun 24, 2008
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- 45,522
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- London
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- 2022 Hyundai IONIQ 5 RWD / 2016 Suzuki Vitara AWD
It can be, if they did a particularly crappy job when filling it up in the first place.
