Detroit Diesel 4000 Series, Service Manual, Page: 2668 / 2706

SERIES 4000 12/16V SERVICE MANUAL
E 012.05 AB – ENGINE COOLANT LOSS
Start with the first probable cause for engine coolant loss listed in Table 27, perform the check
and take the suggested remedial action. If the problem persists, go to the next probable cause,
perform the check, etc., until troubleshooting is complete.
Probable Causes Check Remedial Action
Engine coolant system leaking
externally Refer to section E 012.05 AA Refer to section E 012.05 AA
Engine coolant system leaking
internally Refer to section E 012.05 AA Refer to section E 012.05 AA
Engine coolant pump leaking Engine coolant pump Repair
Display fault
Engine coolant level transmitter Transmitter wiring dialogue
unit/fault recorder or fault display
via flashing light Repair; replace if necessary. Refer to
DDEC III/IV Single ECM Troubleshooting
(6SE497) and/or
DDEC Multi-ECM
Troubleshooting Guide (6SE496)
Table 27 Engine Coolant Loss
E 012.05 AC – ENGINE COOLANT LEVEL RISING
Start with the first probable cause engine coolant level rising listed in Table 28, perform the check
and take the suggested remedial action. If the problem persists, go to the next probable cause,
perform the check, etc., until troubleshooting is complete.
Probable Causes Check Remedial Action
Engine oil in engine coolant Engine oil heat exchanger Repair; replace if necessary
Engine coolant quality Refer to section E 012.05 AA
Air in engine coolant Vent lines Clean
Compression pressures Replace cylinder head gaskets
Table 28 Engine Coolant Level Rising
All information subject to change without notice.
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