Radiator pressure
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Joined: Jan 2009
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The pressure should be caused only by the expansion of the coolant as it heats up. If you relieve pressure after it's up to operating temp and it builds up again (without cooling and re-heating) then somthing is getting into the cooling system. Likely air, likely headgasket.
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Freshman User
Joined: Sep 2008
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Yes steel, there was a 20* dif between the thermostat neck and the top radiator hose at the neck and a 20* dif between the top rad hose and the bottom rad hose. I replaced the water pump the temps are all very close now. The engine temp is alos much more stable and the engine coolant and oil temps are VERY close now. Still building 16 + pounds in the rad. Starting to see the dollars fly out the window again. Doing a cooling system flush with prestone flush, started earlier today, have run through three hot cool cycles. Will drain Sunday morning and flush two or three times befor adding anti freeze.
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