Put cardboard in front of radiator to raise engine
temperature if needed, but do not let coolant boil.
Run engine at 650 to 700 rpm until engine temperature reaches 160°F to
180°F . Run engine for at least 15 minutes.
Refer to TM 9-2320-209-10.
Do not take off filler cap (1) before pressure has been
let out. Pressure will blow out scalding fluid and vapor.
Personnel can be badly burned.
Put heavy cloth over radiator filler cap (1). Press down and turn filler cap
slowly to left to the first stop. Let all pressure out of cooling system.
Press down and turn filler cap (1) all the way to left and lift it off.
GO TO FRAME 3