Join Date: Mar 2012
Location: Kingman, AZ 86409
My Prowler started a new act! The cooling fan comes on at 150 F, and it will cycle for the first 5-10 minutes of running. The upper hose heats up as normal, the bottom hose also heats up, but then (after 5-10 minutes) it begins to cool. I monitor the outside of the head for surface temp and it never exceeds 160. After the bottom hose cools I open the air bleed and nothing comes out! There is no trace of oil coolant contamination, no leaks in the system that I can find. I'm thinking a cracked cylinder head that starts to allow combustion gases into the coolant passage as it warms up. I would think a leaking head gasket would only get worse. I have a new water pump, and the thermostat is fine.
2009 700EFI XTX, , AC Winch, 2010 Dust Shield EPI Sport Utility Clutch Kit , Street Legal, Cage chopped 2 ", Aluminum Diamond Plate Trim, Relocated Factory Bladders with covers, 5 Pt. Harness installed, Bed Tiedown System, Scat Pro-Car Seats, Secondary Battery installed, Oil Pressure, Oil/CVT Temperature, Volt Meter & Water Temp Gauges installed with Dash Plate, Bighorns, ITP Black 212 Wheels. Tonneau cover. 750 Big Bore Kit, Web Cam, and Rocker Arms.
Either - Dick or RD