Originally posted by airman1:
I agree with everything said so far except that there is one question that begs the answer/ What blows the hoses up? Surely it must be something getting in to the system to do this. As far as I know that can be only form the head gasket leak.


He also said he removed the spark plug from the weak cylinder so that cylinder would have no compression to blow up the hoses. A reading of 150 and a low of 125 in one cylinder is not a real sign of a head gasket. He could do a pressure test on the rad...or find antifeeze in the engine oil, or a spark plug that is fowled. If he runs the car with the surge tank cap off and the car heats up as fast as he says...then any pressure in the hoses would be expelled out of the surge tank..."IF the Thermostat is open" I have one question...And I don't want to make out that you don't know what your doing...But you said you replaced the thermostat before correct??? Are you sure you have it in the correct way? and not backwards? In any case remove that rad cap and run the car again and report back if you still have that explosive pressure in the hoses.