OK, the new-to-me 1990 240DL has lost about 2 quarts of coolant over the last 3 months and approximately 1000 miles. I have no spots on the driveway even if it is run for an extended period in place (now that the tail shaft bushing is replaced). I have checked the obvious suspects...no steam-cleaned spark plugs, no chocolate milk oil, no sign of coolant in the tranny fluid and the weep hole on the bottom of the water pump is dry. I have not noticed a coolant smell in the car and neither floor-board has a damp feeling (have not pulled carpet yet).
So what is your favorite guess for the phantom coolant leak? I can't check them until I get back from vacation but I am curious.
Car came to me with a new water pump and physically broken thermostat. I still have not fixed the temp compensating board but I "know" it is not overheating.
Thanks,
Mike
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