Detroit Diesel — Extended Storage (More Than 30 Days)

Maintenance · Engine

From a Detroit Diesel service manual — check it applies to your exact model before use.

Procedure

1. Drain the cooling system, flush with clean soft water, refill and add a rust inhibitor.
2. Remove, check and recondition the injectors if necessary; reinstall, time them and adjust exhaust valve clearance.
3. Circulate coolant by operating the engine until normal operating temperature (160-185°F).
4. Stop the engine; drain the crankcase and install new lubricating oil filter elements and gaskets.
5. Fill the crankcase with 30-weight preservative lubricating oil MIL-L-21260C, Grade 2.
6. Drain the fuel tank and refill with clean No. 1 diesel fuel or pure kerosene for about ten minutes of operation.
7. Drain and disassemble the fuel filter and strainer; discard used elements and gaskets; fill with No. 1 diesel fuel or kerosene and reinstall.
8. Operate the engine for five minutes to circulate clean fuel oil throughout the fuel system.
9. Service the air cleaner.
10. Drain the marine gear oil and refill with clean oil; start and run at 600 rpm for ten minutes and engage clutches alternately.
11. Seal the turbocharger air inlet and turbine outlet connections with moisture resistant tape.
12. Apply a non-friction rust preventive compound to all exposed parts.
13. Drain the engine cooling system and drain the preservative oil from the crankcase.
14. Clean the battery and cables with baking soda-water solution, charge fully and store in a cool dry place.
15. Insert heavy paper strips between pulleys and belts; seal all engine openings and protect painted surfaces.

Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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