Can anyone explain a strange coolant leak on a 450 SEL 6.9. Everything runs
fine however if I run the car for about 10 + miles (basically warming it up
to 175F) then return home I seem to develop a coolant leak about 20 hours
later? I have checked it when it is running and all appears fine, after
stopping the coolant does not leak, and seems to maintain pressure. I am
trying to determine the area of the leak but haven't been able to witness it
yet. I did a bulb test and it appears to be very low on antifreeze would
this be an issue? I will replenish the antifreeze level but would like to
determine the leakage area first. Any suggestions, why the delay? I can
only assume that it is a slow leak somewhere causeing it to pool somewhere?
MY c-class got similar problem, and finally found out was a leak in the
engine cylinder head gasket, the lower bit of the engine block got water
marks (coolant had vapourised).
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