MAINTENANCE
SECTION 5
CMD-3967823 / 90-865237030 OCTOBER 2003 Page 67
CE524
Engine Coolant
Checking
CAUTION
Allow the engine to cool before removing the pressure cap. A sudden loss of
pressure could cause hot coolant to boil and discharge violently. After the engine
has cooled, turn the cap 1/4 turn to allow any pressure to escape slowly, then push
down and turn the cap all the way off.
1. Allow the engine to cool.
2. Remove the pressure cap from the heat exchanger and observe the coolant level.
3. The coolant level in the heat exchanger should be at the bottom of the filler neck. If
coolant is low refer to Filling.
NOTE: If no coolant is visible in the heat exchanger or operating temperatures are
excessive, air may have become trapped in the cooling system. Contact your authorized
Cummins MerCruiser Diesel dealer / distributor.
75301
a
b
Typical
a-Pressure cap
b-Filler neck
IMPORTANT: The pressure cap is correctly installed if it contacts locking tabs on the
fill neck when tightened.
4. Install the pressure cap. Tighten until it contacts locking tabs on the fill neck.
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