My buddy is having issues with overheating. We have tried lots of things and now he is at the end. Replaced the waterpump (all parts). He tried to replace the thermostat but ended up breaking the radiator . $425.oo boo boo. Has coolant in the oil after two oil changes since replacing the waterpump seals. Is this a headgasket???? Can I do leak downtest to determine if it is the Headgasket??? does anyone have a leakdown tester I could borrow??? Any and all responces might save a rider from jumping off.