I have 2000 Volvo s40 1.9t when I add coolant to expansion reservoir it comes up in one of the spark plugs Wells I started the car once after it stalled with starting fluid I drove it’s lil but it ran really bad I’m sure its blown head gasket due to the fact I noticed a lil ...
7.Noisy idler pulley or tensioner bearing.To route a serpentine belt, many cars use free-spinning pulleys like the one in the photo. It's called an idler pulley. It spins on a little bearing. When that bearing goes bad, it can produce a whining/whirring or screeching noise. Because seve...