1986-1989 Honda TRX250 FourTrax 250R Service Manual, Page 115Get this manual
COOLING SYSTEM Install the new inner gasket and dowel pins
Install the platenew outer gasket and water pump cover
Install the water pump cover attaching bolts and tighten them Connect the radiator hoses to the right crankcase coverTighten the rad iator hose band screws securelyFill the cooling system with the recommended coolant (page 9-1 and 3)