1 Cooling System has lost its prime Fri Apr 06, 2012 4:10 am
FreebasserSF
Silver member
I've noticed that when the bike is heating up coolant goes from where the radiator cap is into the overflow container, however, when the thermostat opens no water gets pulled from the overflow container back into the cooling system, and the bike slowly heats up until the overheat light comes on. The hose from the radiator cap to the overflow is fine, I checked it for leaks, so I suppose the radiator cap could be leaking air, although air bubbles bubble up in the overflow tank indicating air isn't leaving through the radiator cap. What could be causing the cooling system to lose its prime and prevent it from sucking coolant back into the radiator?
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"Build a man a fire and he will be warm for a day. Light a man on fire and he will be warm for the rest of his life."