1986 Accord, 225,000 miles. Left home a week ago, all seemed normal. After a couple of miles, I noted no heat and temp gage still on Cold. Then I noticed white smoke in exhaust behind me. I stopped and refilled radiator and drove 4-5 miles with white smoke the whole way. Pulled the plugs and cranked it over and water was spraying out #4 spark plug hole. Drained radiator and checked compression. #1 150 psi #2 140 psi #3 170 psi #4 150 psi I'm guessing that the head gasket is blown, but if the head gasket is leaking that much coolant, would I still be getting 150 psi pressure on that cylinder? Any other diagnosis for these symptoms? With the age and mileage on this car, I don't want to spend much. I was planning on pulling the head, replace head gasket, timing belt, and water pump and hope I get another couple of years out of it. TIA John