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I got a300 grizzly an changed water pump now the temp. light com's on why?

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1. There's a problem with the pump installation, such as an incorrect gasket blocking a passage, wrong hose connections, or loose belt (if you have a serpentine belt with a tensioner, verify that the belt is correctly routed and is not inside out. The ribbed side should be riding on grooved pulleys, and the smooth side should be on flat-surfaced pulleys.)
2. There's a major blockage in the coolant system, such as debris from the old pump jamming the thermostat.
3. The system is low on coolant because there was a lot of air remaining in the system when you put the coolant in.

Also, check that the radiator fan(s) is working properly. Maybe a stray tool or part is hanging it up, or the fan motor is disconnected - stranger things have happened under the hood.

Posted on Nov 18, 2014


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