Cooling System - Reverse Flushing

REVERSE FLUSHING ENGINE-V-6, V-8, AND V-10

Drain cooling system. Remove thermostat housing and thermostat. Install thermostat housing. Disconnect radiator upper hose from radiator and attach flushing gun to hose. Disconnect radiator lower hose from water pump and attach a lead-away hose to water pump inlet fitting.
Connect water supply hose and air supply hose to flushing gun. Allow engine to fill with water. When engine is filled, apply air in short blasts, allowing system to fill between air blasts. Continue until clean water flows through the lead away hose.
Remove lead away hose, flushing gun, water supply hose and air supply hose. Remove thermostat housing and install thermostat. Install thermostat housing with a replacement gasket. Refer to Cooling System, Thermostat, Service and Repair. Connect radiator hoses. Refill cooling system with correct antifreeze/water mixture.

1. Drain the cooling system.

2. Disconnect the radiator lower hose from the water inlet connection.

Typical Reverse-flushing-5.9L Diesel:

3. Remove the heater core inlet hose from tube.

4. Attach water supply hose to heater tube.

5. Back-flush the engine until clean water exits the water pump inlet.

CHEMICAL CLEANING

In some instances, use a radiator cleaner (Mopar(R) Radiator Meen or equivalent) before flushing. This will soften scale and other deposits and aid flushing operation.

CAUTION: Follow manufacturers instructions when using these products.