[Vanspeed]

Carbon and water can make you think it is oil. I had a 46 flathead in a truck a few years ago and coming back from a show, it started blowing what I thought was oil out the driver side header. Replaced a few valve seals that I thought were the problem, re-ringed the motor, and still the same thing. Replaced the head gasket each time to no avail. I ended up giving up and sold it. Next owner called me up and said the head had cracked and it was not oil, it was a mixture of carbon and water.