This procedure describes the proper method to prepare an engine for long term storage (6 to 24 months).
NOTE: After 24 months in storage, the engine cooling system must be flushed with a suitable solvent or a light, hot
oil. This procedure must then be repeated.
Operate the engine at ‘‘High Idle’’ speed until the coolant temperature indicator reaches:
Temperature: 70°C [160°F]
Shut off the engine.
Drain the lubricating oil pan. Install the drain plug.
Torque Value: 136 N•m [100 ft-lb]
Fill the oil pan to the ‘‘High’’ level mark with preservative oil.
NOTE: Use Shell 66202, or an equivalent preservative oil.
The oil must meet Military Specification MIL-L-21260 Type R10 Grade 2 SAE 30.
Remove the fuel lines to the engine fuel filter and the injector return line.
NOTE: Use Daubert Chemical NoxRust No. 518 Preservative Oil, or equivalent. The oil must meet Military Specifi-
cation MIL-L-644 Type P-9.
Fill two containers, one with diesel fuel, the second with preservative oil. Install both fuel lines in the container of
diesel fuel.
Start the engine.
After the engine is operating smoothly, transfer the fuel supply line to the container of preservative oil. Operate
the engine until the preservative oil is coming out of the injector return line.
Shut off the engine.
Install the fuel lines to the fuel filter and the injector return line fitting.
Drain the preservative oil from the lubricating oil pan and the oil filters.
Install the drain plug.
Torque Value: 136 N•m [100 ft-lb]
Drain and flush the cooling system.
NOTE: Use a rust inhibitor that will mix with water.
Remove the intake manifold. Remove the exhaust manifold. Refer to Engine Disassembly (00-01).
Spray preservative oil into the intake and exhaust ports in the cylinder head and into the exhaust manifolds.
Install the intake manifold. Install the exhaust manifold.
Refer to Engine Assembly (00-02).
Remove the rocker housing cover. Refer to Engine Disassembly (00-01).
Spray the rocker levers, crossheads, valve springs, valve stems, valve guides, and the push rods with preservative oil.
Install the rocker housing cover. Refer to Engine Assembly (00-02).
Spray preservative oil into the intake port on the air compressor.
Brush or spray preservative compound on all of the exposed surfaces that are not painted.
NOTE: Use a rust preservative compound that meets Military Specification MIL-C-16137C Type P-2 Grade 1 or 2.
Cover all of the openings with heavy paper and tape to prevent dirt and moisture from entering the engine.
Install a warning tag on the engine. The tag must indicate:
• The date the engine was treated with preservatives.
• Do not rotate the crankshaft.
• The coolant has been drained.
• Do not operate the engine.
Store the engine in an area that is dry and has a constant temperature.
