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Old 08-18-2011, 08:15 PM   #9
Paul from Maine
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Join Date: May 2010
Location: Oxford Hills, Maine
Posts: 325
Default Re: Ok so a brand new radiator and it still runs hot

Could be a blown head gasket or lots of crud and rust in the water jackets if it is not the timing. Last time I had the head off my motor I pulled a coffee cup full of rust out of the water jackets with a magnet on a telescopic rod. A year later I had the engine rebuilt and the rebuilder told me the rear water jackets were still full of crud when he disassembled the motor. Even so, I had not had any cooling problems with my Brassworks radiator. In fact I had to put a thermostat in the upper hose to get the temp above 135 despite all the crud in my water jackets. If the upper part of the radiator is 220 and the bottom 150, then the radiator is doing its job. It must be something besides the radiator.
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