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The jiggle valve's a small hole on the thermostat itself (not a separate part). It's merely there to help free the system of trapped air. Follow the hose from the top of the radiator to the motor and you should find the thermostat housing. Removing the housing will reveal the thermostat and at the top of the Tstat should be a small hole -- that would be the jiggle valve (if your thermostat actually has one).

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15y ago

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