Radiators are heat exchangers used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The following diagram shows 1988 Honda Accord (A20A4 engine) Radiator schematics. The radiator system consists of coolant reservoir, lower radiator hose, heater hose, thermosensor, upper radiator hose, drain plug, O-rings, fan motor, and radiator cap. (click picture to enlarge). For maintenance, check all cooling system hoses for damage, leaks or deterioration and replace if necessary, check all hose clamps and retighten if necessary, use new O-rings whenever reassembling.