and brush foreign particles away from oil cooler fins 2 With the oil cooler access hole cover removed insert an air hose gun under oil cooler fig 6A 8 and blow up through oil cooler fins NOTE Hold exhaust door open with a block of wood 3 Replace oil cooler access hole cover COOLING SYSTEM EXHAUST DUCT DAMPER In the event of a failed thermostat bellows the exhaust damper door fig 6A 9 will remain in the open position allowing a maximum air flow over the engine to prevent overheating Recirculating slots are located in each exhaust duct for circulating warm sir into the engine compartment 4 3 5 w i i C W I 1 7 21l Zri I DAMPER DOOR FULL OPEN VIEW A Fig 6A 9 Exhaust Duet L 1 Retainer Nut 4 Bracket Assembly 2 Heat Shield S Actuating Rod 3 Thermostat Assembly 6 Exhaust Damper Door r t Ns 6A t Cloaning Oil Cooler When installing a new thermostat it is necessary to adjust the exhaust duct damper door opening to wB ii j y BRACKET STOP 40 l Y J ROD y THERMOSTAT EW B l VIEW C bnrpor Thermostat Adjustatent 7 Lower Shroud and Exhaust Duct 9 Retainer Clip 8 Screw 10 Swivel