Will a bad VCG leak coolant? My mom has a 2002 330i that I changed the spark plugs on a couple months ago, and I noticed a little bit of oil on a couple of the plugs. It was a little amount of oil so I didn't really think it was that bad. She also had her entire coolant system replaced about 2 years ago, and today she tells me she's had to refill the coolant again.
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