PCM 2008 Catanium CES 6.0L ZR-409, Owner'S Operation And Maintenance Manual

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63
L510010-11
TROUBLESHOOTING - 14
Malfunction Possible Cause Corrective Action
Engine Overheats
Loose or worn drive belt(s) Adjust or replace the belts as
necessary.
Collapsed, kinked or leaking Replace the hoses.
hoses.
Transmission/engine oil cooler Remove the water hoses and fl ush
plugged in opposite direction of the normal
fl ow.
Faulty thermostat Replace the thermostat.
Sea-water intake valve Open the valve completely.
partially/fully closed.
Restricted sea-water pickup Remove restriction.
Faulty temperature sending unit Test and replace as necessary.
or gauge
Sea-water pump impeller worn or Replace the impeller.
damaged
The following applies to engines
Coolant level low in the fresh-water Check the cooling system for leaks.
equipped with Fresh-Water
section of the cooling system Re fi ll the system. See Warning
Cooling (FWC) systems.
before removing the fi ll cap.
Heat exchanger passages plugged Clean and fl ush the exchanger.
with scales and debris
Improper coolant mixture Install the proper coolant mixture
(50% antifreeze - 50% water).
Insuffi cient engine temperature
Faulty thermostat Replace the thermostat.
Faulty temperature sender Replace the temperature sender.
Engine oil pressure low
Faulty oil pressure sending unit Test and replace as necessary.
or gauge
Oil level low Add speci fi ed oil. Check the engine
for leaks.
Crankcase over fi lled causing oil Remove the required amount of oil.
aeration Determine the cause of over fi lled
condition (improper fi lling, etc.).
Diluted or improper grade/ Change the oil and fi lter.
viscosity of oil Determine the cause of dilution.
(insuf fi cient engine temperature,
excessive idling, etc.)