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 ...
In order to get the benefit of using the BlueDevil Head Gasket Sealer, the vehicle would need to be able to idle for a full 50 minutes without overheating or stalling out, and you shouldn’t be losing more than about a quart of water/coolant during that 50-minute run. If you can mee...