SEBU8455
71
Maintenance Section
Coolant Level - Check
i04272912
Coolant Level - Check
Check the coolant level when the engine is stopped
and cool.
g00285520
Illustration 42
Cooling system
fi
ller cap
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system
fi
ller cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
1.
Remove the cooling system
fi
ller cap slowly in
order to relieve pressure.
2.
Maintain the coolant level within 13 mm (0.5 inch)
of the bottom of the
fi
ller pipe. If the engine is
equipped with a sight glass, maintain the coolant
level to the proper level in the sight glass.
g00103639
Illustration 43
Typical
fi
ller cap gaskets
3.
Clean the cooling system
fi
ller cap and check the
condition of the
fi
ller cap gaskets. Replace the
cooling system
fi
ller cap if the
fi
ller cap gaskets are
damaged. Reinstall the cooling system
fi
ller cap.
4.
Inspect the cooling system for leaks.
i03644948
Cooling System Supplemental
Coolant Additive (SCA) -
Test/Add
Cooling system coolant additive contains alkali.
To help prevent personal injury, avoid contact with
the skin and the eyes. Do not drink cooling system
coolant additive.
Test for SCA Concentration
Heavy-Duty Coolant/Antifreeze and SCA
NOTICE
Do not exceed the recommended six percent supple-
mental coolant additive concentration.
Use a Coolant Conditioner Test Kit in order to check
the concentration of the SCA.
Add the SCA, If Necessary
NOTICE
Do not exceed the recommended amount of sup-
plemental coolant additive concentration. Excessive
supplemental coolant additive concentration can form
deposits on the higher temperature surfaces of the
cooling system, reducing the engine's heat transfer
characteristics. Reduced heat transfer could cause
cracking of the cylinder head and other high temper-
ature components. Excessive supplemental coolant
additive concentration could also result in radiator
tube blockage, overheating, and/or accelerated water
pump seal wear. Never use both liquid supplemental
coolant additive and the spin-on element (if equipped)
at the same time. The use of those additives together
could result in supplemental coolant additive concen-
tration exceeding the recommended maximum.