3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
So the other day, while I had a couple friends helping me look at the car we opened the radiator reservoir cap and turned on the car and let it heat up. After it had heated up, my friends noticed that when we reved the engine there were air bubbles being produce in the reservoir tank. What could be causing this? My friends think it's a head gasket. But what are the signs of a blown head gasket? I have a 1991 318i. I'm a poor college kid so you can guess how much I'm praying this isn't a head gasket. Thanks
That looks more like an air leak near the heater matrix or there abouts... Maybe a perished heater pipe or slightly loose connection, or even a goosed matrix...
If it was head gasket it would probably spit out more !!
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