building up radiator pressure and blowing radiator, upper hose very hard. Replaced water pump, thermostat and now third radiator. What could be the cause?
3 Answers
leaking headgasket is my first bet. If your radiator is over- pressurizing, check fluid levels. When does it blow? When idle? When at higher RPMs?
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Replace the radiator cap in case it is holding too much pressure.
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If the $5 radiator cap doesn't fix it then what? Head gasket?