My buddy has a 84 fj60. And he has had lots of problems with overheating. (probably bc he drove it with a closed thermostat for 6 mo. vapor locking it every day) Anywho There is no evidence of a blown head gasket except he took it to a shop and he said there was a high level hydocarbons in the coolant indicating exhaust in the coolant. I think it might be a bad HG and/or a warped head. what do you think. Also what does it cost to have the head remachined. Also if the head is remachined do I have to get the block remachined.