Quote:
Originally Posted by 2V8s
interesting, my 1991 960 24v 3 litre also looses a little coolant, although probably only needs topping up once a year and / or every 2-3000 miles.
How could the coolant get into the automatic gearbox? that would worry me a little.
otherwise I was thinking to stick a bottle of K-seal in, as I had otherwise suspected a slight leak from the heater matrix as every so often its quite misted up inside.
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That doesn't sound too unreasonable.
As the radiator is split and shared, cooling the engine and gearbox, there's the potential for splits and cracks. Maybe after extremely low temps and only having water in the rad, it freezes and cracks or just weakens the core enough that the heat expansion after when the engine is running creates a gap for the coolant and ATF to mix.