Hi,

Im new to this forum and as a Volvo owner also. I recently bought a 1959 544 with a 1964 B18 engine. Car runs and drives great except for one little thing, overheating. Main symtom is that it will run-on when the ignition is turned off.

The Engine, radiator, water pump, thermostat and hoses are all new. The lady I bought it from said they had spent a lot of time trying to figure the problem out , and that the only "hot" area is at the back of the cylinder head where the temp sensing unit sits. Today I even used my infrared thermometer on the head and sure enough the rear of the cylinder head is 30 degrees hotter on average than the rest of the head and the block.


I have a set of smith guages under the dash and when sitting for a short time at idle, the temp guage will soar up to 200 F in no time. I checked it against my IR thermometer at the sensing unit and it is dead on.

Is it possible for the head to get a blockage in the water jacket? I have the factory Volvo manual and I noticed it has some strange "distribution pipe" in the head, can this get blocked????

Any help would be greatly appreciated

Cheers
Rob