DDEC IV TESTING
Engine Coolant Loss
Perform the following steps for
Engine Coolant Loss
.
1. Verify the quantity of engine coolant loss per mile.
NOTE:
_______________Miles driven_______________Coolant added
PRESSURIZED AIR AND FLYING PARTICLES
To avoid injury to eye or face, wear a face shield or goggles
when conducting a pressure test.
2. Pressure test the cooling system.
3. Visually inspect the engine for external coolant leaks (e.g. water pump, coolant hoses,
etc.).
[a]
If coolant leaks were detected, replace the leaking component as required.
[b]
If no coolant leaks were detected, perform step 4.
4. Visually inspect the engine oil for coolant.
[a]
Coolant is found in the engine oil, this indicates an oil cooler or internal engine fault.
[b]
If no coolant is found, perform step 4[c].
[c]
If the engine is losing coolant at a rate of more than 1 gallon in in 5000 miles, and no
engine coolant leaks were detected, replace the EGR cooler.
[d]
If the engine is losing coolant at a rate of less than 1 gallon in 5000 miles, contact the
Detroit Diesel Technical Service Group.
Engine Backfire, Engine Misfire, Intermittent Exhaust Smoke
Perform the following steps for
Engine Backfire, Engine Misfire, and Intermittent Exhaust
Smoke
.
1. Reprogram the ECM.
5-6
All information subject to change without notice.
(Rev. April 2004)
7SE60 0404
Copyright © 2004 DETROIT DIESEL CORPORATION
