Hi, My friend has a car, an E34 BMW 535i, it has seen better days to say the least, and has had a blown head gasket for the past few years (coolant leaking into oil lines). It has still been going strong with regular oil changes, i know it will eventually die, but its not worth fixing, just wondering is it better to run coolant or water? I heard coolant can do severe damage to the top of the engine.
Thanks.
Thanks.
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