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yamsuzpolaris
yamsuzpolaris, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 156
Experience:  service technician on yamaha suzuki polaris products since early 70's. currently own and manage deal
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I HAVE A 2012 POLARIS RANGER 500 EFI CREW. IS OVER HEATING

Customer Question

I HAVE A 2012 POLARIS RANGER 500 EFI CREW. IS OVER HEATING REPLACED THERMOSTAT AND CHECKED FINS ON WATER PUMP AND THEY ARE FINE.SEEMS LIKE NO WATER COOLENT FLOW THROUGH PIPES.... COOLING FAN KICKS ON FINE. WHAT ELSE SHOULD I LOOK AT? ITS ON A ISOLATED ISLAND WITH NO BRIDGE, IT WILL COST ME HUNDREDS JUST TO GET IT BACK TO MAINLAND SO WOULD REALLY LIKE TO FIX MYSELF IF POSSIBLE
Submitted: 1 year ago.
Category: Motorcycle
Expert:  yamsuzpolaris replied 1 year ago.

flow starts at the water pump intake. water flows thru the cylinder, up thru the head, out past the thermostat housing and then to the top nozzle of the radiator. water cools in the radiator then flows down thru to the bottom outlet hose, where it flows back into the water pump housing. its a very simple system. usually never a problem with the water pump impeller itself. the first place to start is that the cooling system if full, and allowed to run till the air is out of it. if you suspect a bad thermostat you could even remove it and try to run the engine. with the engine running and still cold you could remove the top hose to the radiator and make sure water is flowing out, you can test this by pulling the hose off an holding pointed upward and see it water flows out the end. obviously this will deplete cooling system so don't do this for too long, re-attach hose and then refill the radiator. usually if there is a leak then there will be a loss of coolant, such as a water pump seal leak, radiator leak, bad radiator cap. a way to test for leak even with systm filled with coolant is to put a pressure test cap on it and pump it up. should hold 10 psi for quite a while. this will tell if you have a leak, andif pressure drops but you cannot see any leakage from below the water pump housing, radiator, hoses or fittings, there is a chance that head gasket is bad or even something remote like a warped or cracked head. if its not leaking, if it holds pressure, flows from thermostat housing to the radiator then its gotta work. unless if radiator was restricted at either top inlet or bottom exit, water gotta flow thru it and then back to the engine. Hope this helps explain how these parts work.

Mark