![]() ![]() (illustration)Ī small amount of coolant will flow out, just stuff some paper towels under the sender plug to catch it. Pull the sender directly upwards to keep from distorting the o-ring below.Start by pulling the electrical connector from the sender. ![]() Much stay where it should when you pull the sender (no need to drain coolant!). Note that the coolant system is sealed, and thanks to the vertical orientation of the sender, the coolant will pretty ![]() The sender is located at the rear of the engine, and is one of the few easily accessible parts on the car. You may also end up replacing the coolant expansion tank to get the coolant level sensor working.Note - always confirm part numbers by looking at the actual part mounted in the car! Mistakes will happen sometime, somewhere.ġ.8t VIN: pre 3B-X-491580 - 078 919 501 B (blue)ġ.8t VIN: post 3B-X-491581 - 059 919 501 A (green) Once you get the problem diagnosed and repaired, drain and fill the cooling system with a 50/50 mix of distilled water and G12 coolant. If you don't see signs of water/oil mixing, you may just be dealing with the previous owners mistake of adding the wrong type of coolant to the G12 already in the system. If you detect fresh oil entering the cooling system, you likely need to replace the oil cooler. Then check the water in the system to see if it shows signs of fresh oil contamination. Then with only water in the system, drive it around a while. Flush it repeatedly until you get nothing but clear water coming out. If you see signs of water in the oil, don't run the engine until you get the problem solved and fresh oil in the engine.ĭrain and flush the cooling system. Water in the engine oil will produce something that looks like a chocolate milk shake. If the cooler has sprung an internal leak, it could be pumping oil into the cooling system (and coolant into the engine oil).Ĭheck the engine oil for signs of water contamination. It's located just above the oil filter and uses the engine cooling system to cool the engine oil. The engine oil cooler is a liquid-to-liquid heat exchanger. I imagine it could also block the radiator and inhibit engine cooling. The goop will eventually block the heater core and you'll get no heat. If someone has mixed in other types of coolant, the two types react chemically and form a brownish goop. The coolant system comes from the factory filled with water and G12 coolant. Now I'm shocked visualizing the sludge that came out. The module under the seat was OK, completely dry. It seems there is still a minor leak to be found. I fixed it, partially, sealing a broken rubber by the battery compartment. Then I learned abt lots of people with same problem. However one day I noticed the rear carpets on the pilots side were damp. I bought the car second hand because it was like new. Anyway I drove her for abt 5 miles, made no weird noises and everything was OK, but with the warning flashing STOP. So I took the car for a spin but just seconds after the initial dash lights routine and without starting the car, again, 3 loud beeps and the same warning. I washed it with detergent the best I could, and filled it with fresh coolant. As a matter of fact I removed the expansion tank and, along with coolant, out came some sort of brownish sludge. ![]()
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