Flush The Coding System - Dodge D250 1990 Service Manual

Cooling System Replacement Procedures
Page 7-20
Coding System
DODGE Turbo Diesel
p Flush the Cooling System
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To clean the cooling system, back flush the radiator and engine
with clean water.
Remove both radiator hoses from the engine. Attach the water
supply to the lower radiator connection and back flush the
radiator.
If the radiator shows mineral build-up, scale, rust or oil, use a
heavy duty radiator cleaner and follow the manufacturer's
directions.
|) Remove the top heater hose. Attach the water supply to the
heater line and back flush the engine.
if the radiator shows mineral build-up, scale, rust or oil, use a
heavy duty radiator cleaner and follow the manufacturer's
directions.
a mixture of 50% water and 50%
ze. Refer to the Specifications,
\//////,
During filling, air must be vented from the engine coolant
passages. The air vents through the "jiggle pin" openings in the
thermostat out the top radiator hose and fill opening.
The system has a maximum fill rate of 14 liters/minute [3.5 U.S.
gallons/minute]. Do not exceed this fill rate.