ENGINE COOLING SYSTEM PART 8: MAINTENANCE AND SERVICE
– 194 – Y53-6032 (R05/10)
Proper Coolant Level
NOTE: Do not overfill a cooling system. Excess
coolant may result in overflow, loss of antifreeze,
and reduced corrosion protection.
• The proper coolant level for a cold engine is at the
base of the filler neck extension tube.
• The proper coolant level for an engine at normal oper-
ating temperature is even with the pressure cap seal.
Refilling Your Radiator
1. If your cooling system is built with petcocks in the
upper engine coolant pipe, open them before filling
the surge tank.
2. Be sure the radiator and engine block drains are
closed.
3. Remove the surge tank pressure cap
4. Through the surge tank, fill the system with premixed
coolant. Pour it in a steady flow until the surge tank is
full. It may be necessary to pause for 1 minute and
then re-fill if the fluid level dropped.
WARNING! Do not ingest ethylene glycol
based antifreeze, it is poisonous. It can be
harmful or fatal, especially to children. Store
in its original container only and keep it out of
reach of children.
5. If the system has petcocks, close them.
6. Start the engine and idle at a low RPM.
7. During low rpm idle, air will purge from the cooling
system which will lower the coolant level in the surge
tank. Continue to fill the surge tank until the level
remains at the base of the fill neck. This may take up
to 2 minutes.
8. Operate the engine throttle unitl the operating temper-
ature stabilizes (when the thermostat opens).
9. Fill the surge tank as necessary to raise the coolant
level to the proper reading.
10. Operate the engine at high idle for another 10 minutes
and add coolant to raise the level back up to the base
of the fill neck.
11. Replace the surge tank pressure cap.
Y53-6032.book Page 194 Monday, May 24, 2010 3:37 PM
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