The radiators used in the P72 and the P92 chassis are the cross-flow type, constructed from aluminum with plastic surge and coolant recovery reservoirs. Core repair is made easily with a hot melt adhesive method. The P92 chassis also has plastic side tanks. The plastic side tanks can be removed but not repaired.

All radiators are fitted with a shroud designed to assist the fan in directing air flow through the radiator core and to serve as a fan guard. A coolant recovery tank provides for coolant expansion. This retards coolant overflow and reduces frequent refills.

Pressure is maintained in the radiator and the cooling system by a pressure/vent cap. The pressure/vent cap has two valves. One valve relieves pressure and the other prevents a vacuum from forming by compensating for coolant contraction when the engine is stopped. Radiator caps for both the P72 and the P92 chassis are rated 110 kPa (16 psi).

On the P72 chassis, the engine oil and the transmission oil are cooled by a separate oil cooler located immediately behind the radiator. A transmission oil cooler is located inside one of the side tanks on the P92 chassis. The P92 also has an air-to-air aftercooler mounted behind the radiator.