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Can someone tell me how far a thermostat should open? I've had an overheating issue. I took the thermostat out and placed it in boiling water and it only opened about an eighth of an inch. When the overheat indicator light came on the top hose was very hot and the bottom hose was not even warm. Any ideas?
 

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water pump. can ya tell if its working? or buy a new thermostat and try first.
 
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