Cooling System; Coolant - Change - Mitsubishi S6R2 Operation & Maintenance Manual

Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES

Cooling System

Coolant - Change

The service life of LLC is 2 years. Be sure to change coolant at least once every 2 years.
Radiator Cap - Open/Close
When using the engine with radiator cooling system,
remove the radiator cap only after the engine has
cooled to the room temperature. Place a waste cloth
over the cap, and loosen the cap about a half-turn or
stand the lever to the upright position to release inter-
nal pressure. Opening the radiator cap of coolant
expansion tank while the engine is hot causes steam
and hot coolant to blow out and can result in skin
burns.
Note: If the specification of radiator differs from the
contents of this operation manual, follow the
manufacturer's operation manual.
Coolant - Drain
1. When draining coolant immediately after engine
operation, idle the engine in low gear for 5 to 6 min-
utes to lower the coolant temperature to 70 to 80 °C
[158 to 176 °F].
2. Open the coolant inlet.
3. Place coolant receiving cans under the drain cocks
and plugs, and open the coolant drain cocks and
plugs to drain the coolant.
8-16
Turn the cap about
half a turn
Fig. 8-20 Radiator Cap
Fig. 8-21 Coolant Drain Cock (Engine)
Stand the lever to
the upright position
Coolant drain cock