Detroit Diesel 4000 Series, Service Manual, Page: 2647 / 2706

SERIES 4000 12/16V SERVICE MANUAL
E 012.05 A – GENERAL
Internal Coolant Leakage
Subsequential cooling system damage caused by corrosion must be avoided. If the engine cannot
be repaired immediately, carry out the following operations:
NOTE:
These corrosion-prevention measures are only effective for a few days. Repair of the
engine and thorough cleaning of all components should, therefore, be carried out as
soon as possible.
1. Drain coolant and engine oil.
2. Pour corrosion-inhibitor oil, kerosene, or diesel fuel into the cylinder block via the oil
filler tube until the highest possible level of the filler neck is reached.
3. Disconnect charge air coolant manifolds.
4. Remove the fuel injectors. Refer to section C 075.05.05C 075.05.05 .
5. Bar the engine manually and spray corrosion-inhibitor oil, kerosene, or diesel fuel into the
combustion chambers via the opening inlet valves.
Before restarting the repaired engine, fill with new oil and coolant in compliance with the current
specification in the publication Oil, Fuel, and Filter Requirements, DDC/MTU Series 2000,
MTU/DDC Series 4000 (7SE273).
It is essential to change the engine oil after 50 operating hours as the oil may be contaminated
by coolant residues left in the cylinder block.
Engine Oil Dilution by Fuel
When engine oil has been diluted by fuel, it is essential to change the engine oil before restarting
the engine. Remove the old oil from the cylinder block with particular care. Replace the engine
oil filter.
After Servicing Engine
If running gear components, e.g. pistons, piston rings, cylinder liners, etc. have been replaced,
carry out the engine running-in procedure; refer to section B 005B 006 .
All information subject to change without notice.
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