Milky coolant color
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 391
Likes: 14
From: Orlando, FL
05 CLK55 AMG (1 of 247) Cubanitsilber designo series
Milky coolant color
Has anyone experienced a very light, white colored coolant color, while knowing for sure that you had the correct Mercedes antifreeze in your engine? It's not engine oil or transmission oil in the coolant and there is no trace of coolant in the engine oil or transmission fluid.
Member
Joined: Dec 2012
Posts: 249
Likes: 4
From: Huntington Beach, CA
2006 CLK350
Any funny smells in your exhaust? You might want to look at your plugs to see if any of them look different than the others. My first thought is head gasket also if you don't feel there is a radiator problem.
Thread Starter
Senior Member
Joined: Dec 2014
Posts: 391
Likes: 14
From: Orlando, FL
05 CLK55 AMG (1 of 247) Cubanitsilber designo series
No smell other than antifreeze. No, it's not the color of emulsified engine oil and coolant, or transmission fluid and coolant. The white color is thoroughly mixed with the coolant turning the coolant into a thin white milky mixture. Had me and my shop baffled too.
Turns on that the coolant overflow tank on the w209 and probably other Mercedes models contains a water filter inside the tank and filters the coolant through a filtering media of silica powder (white powder). The filter is supposed to be good for 150K to 200k, but my filter housing inside the tank cracked, allowing the silica media to mix with the coolant, turning it white. An odd thing to happen, and whoever heard of a water filter inside the radiator overflow tank, but there you go.
Turns on that the coolant overflow tank on the w209 and probably other Mercedes models contains a water filter inside the tank and filters the coolant through a filtering media of silica powder (white powder). The filter is supposed to be good for 150K to 200k, but my filter housing inside the tank cracked, allowing the silica media to mix with the coolant, turning it white. An odd thing to happen, and whoever heard of a water filter inside the radiator overflow tank, but there you go.
