Re: 120 advise

Posted by fredkanter On 2016/8/15 17:15:34

The problem is not the thermostat, if the thermostat were bad it would overheat while running. If it "boils over" when shut off then some part of the engine is above 212 degrees. This is usually caused by sediment/rust in the back of the block or a corroded water distribution tube.

Try removing the rear most core plug above the starter and see if there is rust/scale in there. Keep in mind the water jacket goes down an inch or so below the plug. If there is junk in there, remove all plugs, fish around with a coathanger and blast it with a pressure washer.

Let us know what you find