Join Date: Mar 2012
Location: Melbourne Australia
I am absolutley stumped. My 86 VN750 is still overheating. I have changed the coolant at all locations, ie heads as well as water pump, and overflow, changed the thermostat for a new one, changed the Radiator cap for a new one. The overflow tank is full when hot and medium level when cool.
The only thing I can think is the water pump is stuffed. When I take off the radiator cap and rev the bike the level does drop down about half an inch and rises and when it returns to idle. Is that normal ?
Its still overheats into the red in traffic. I am using 10/40 oil. And 50/50 coolant (green)
I have also ran the bike for 10 minutes with the radiator cap off it and rocked it from side to side to remove any air bubbles. What else can I try ?
The bike goes really strong so iassume not a head gasket. There is no oil in the coolant, and visa v.