Specifications

RotorWay International
Exec 162F Maintenance Manual
Section 8: Cooling System
The RI 162F power plant is a liquid cooled engine. The water pump circulates coolant from the engine through the radiator.
A fan is located over the closed radiator system to force cooler outside air across the radiator for effective cooling.
Utilization of a liquid cooled system (as opposed to air cooled) allows the operating temperature of the power plant to be
maintained at a constant level, providing consistent horsepower and power plant longevity.
Reference prints: E30-2000, E31-2000, E37-2000
NOTE: Rubber hoses used in the cooling system should normally be replaced at 250 hours, 5 years, or on condition,
whichever comes first. Shelf life, or time before entering service, is not included if the hoses have not been exposed to the
environment and have not been affected by aging.
The Water pump/alternator belt should normally be replaced at 500 hours, or at 5 years, or on condition, whichever comes
first. Shelf life, or time before entering service, is not included if the belt has not been exposed to the environment and has
not been affected by aging. Conditional replacement includes damage resulting from excessive slipping, oil absorption,
cracking, glazing, abnormal wear, or any other damage.
SERVICE NOTES:
1. IT IS EXTREMELY IMPORTANT to follow the cooling system bleeding procedures outlined in the Engine Manual, and
to use ONLY the recommended type of coolant. NEVER use tap water or well water in the cooling system. Failure to
follow these guidelines could result in overheating and corrosion problems that may severely damage the engine and
cooling system.
To clean the outer surfaces of the radiator, spray it with a mild soapy water solution using soft to medium pressure. A
hard stream of water may damage the fins.
2. If the helicopter is stored for a long period of time without operation, place a small amount of oil (#10W non-detergent)
on the water pump shaft seal. For replacement of the water pump, refer to the Construction Manual and prints E30-
2000 and E31-2000. For replacement of the water pump seal and bearings, follow these procedures:
A. Remove the water pump.
B. Remove the water pump pulley (part no. E29-5150). Deburr the bolt hole as necessary.
C. Remove the impeller housing by removing the 7 bolts on top of the water pump body.
INSPECTION CHART
PART NO.
E30-1161 Radiator 100 HR 2000 HR/OC 8-1
E34-1180 Radiator Cap 100 HR 500 HR/OC or 5 yrs
E34-1300 Hose 50 HR 250 HR/OC or 5 yrs
E34-1310 Hose 50 HR 250 HR/OC or 5 yrs
E34-1320 Hose 50 HR 250 HR/OC or 5 yrs
E34-1330 Hose 50 HR 250 HR/OC or 5 yrs
E34-1340 Hose 50 HR 250 HR/OC or 5 yrs
E34-1350 Hose 50 HR 250 HR/OC or 5 yrs
E34-1360 Hose 50 HR 250 HR/OC or 5 yrs
E34-1370 Hose 50 HR 250 HR/OC or 5 yrs
E29-1001 Water Pump Assembly 100 HR 2000 HR/OC 8-2
E29-5150 Water Pump Pulley 100 HR 2000 HR/OC
E29-1131 Water Pump/Alternator Belt 100 HR 500 HR/OC or 5 yrs
E34-5000 Thermostat 250 HR 250 HR/OC or 5 yrs 8-3
DESCRIPTION
SERVICE
REFERENCE
INSPECTION
INTERVAL
R.C.O.
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Rev. 1 7/98