I recently bought a C70 T5 and all was fine for a week, then all of a sudden without any warning it boiled over. I had only driven about 5 miles, so I let it cool for 20 mins or so and drove home gently.
I then flushed the rad etc but it boiled soon after starting it. So next day I fitted new thermostat and cap and refilled with water. It hasn't boiled over since but the water keeps dropping to below min, I've been topping it up everyday so that it doesn't boil again. I can't see any leakage, the system pressurises as normal and retains some pressure until it's cold. Question is; is it the head gasket or not, and if so how difficult is it to change? I've done a 4 cyl 8 valve b200 before (a very long time ago) and how long does it take?
Cheers
Neil
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