PowerTec OMRG25204 - Manual (Page 99)

Lubrication & Maint./2000 Hour/24 Month
OURGP11,000000C –19–24JUN04–3/3
11. After cleaning the cooling system, drain cleaner and
fill with water to flush the system. Run the engine
about 10 minutes, remove radiator cap and pull off
lower radiator hose to drain out flushing water.
12. Close all drain valves on engine and radiator.
Reinstall radiator hose and tighten clamps securely.
Install thermostats using a new gasket. (See
TESTING THERMOSTATS OPENING
TEMPERATURE later in this section.)
IMPORTANT: Air must be expelled from cooling
system when system is refilled. Loosen
temperature sending unit fitting at rear
of cylinder head or plug in thermostat
housing to allow air to escape when
filling system. Retighten fitting or plug
after filling cooling system.
NOTE: Coolant capacity may vary depending on
application.
13. Add coolant to radiator until coolant touches bottom of
filler neck. (See specification for capacity.) Install
radiator cap.
Specification
4.5 L Engine— Coolant Capacity 8.5 L (9 qt) .............................................
6.8 L Engine—Coolant Capacity 11.3 L (12 qt) ..........................................
14. Run engine until it reaches operating temperature.
This mixes the solution uniformly and circulates it
through the entire system. The normal engine coolant
temperature range is 82
°
—94
°
C (180
°
— 202
°
F).
15. After running engine, check coolant level and entire
cooling system for leaks.
16. Inspect the fan belt for wear and check belt tension.
(See Checking Belt Tensioner Spring Tension and
Belt Wear in Lubrication and Maintenance 500
Hour/12 Month section.
40-6
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