Drain the engine lubricating oil. Refer to Procedure 007-037 in Section 7.

Remove the lubricating oil pan. Refer to Procedure 007-025 in Section 7.

Pressurize the engine cooling system. Refer to Procedure 008-018 in Section 8.

NOTE: Apply the air pressure 15 minutes before inspecting the cylinder liner seats. Make sure the system is holding air pressure before beginning inspection.

Inspect the outside diameter of the cylinder liners and the area below the cylinder liner seats in the cylinder block for coolant leaks.

If a leak is found:

• Remove the cylinder liner(s). Inspect the sealing ring and cylinder liner. Refer to Procedure 001-028 in Section 1.

If a leak is found in the cylinder liner seat:

• Remove the cylinder liners. Refer to Procedure 001-028 in Section 1.
• Inspect the cylinder block liner counterbore area. Reference the M11 Shop Manual, Bulletin 3666075.
• If fretting or wear is found, the cylinder block liner counterbore can be repaired. Refer to the L10 and M11 Alternative Repair Manual, Bulletin 3810310.

Install a new gasket and the lubricating oil pan. Refer to Procedure 007-025 in Section 7.

Tighten the oil pan drain plug.

Fill the engine with clean 15W-40 oil. Refer to Procedure 007-025 in Section 7.

Operate engine until it reaches a temperature of 80°C [180°F], and check for coolant or lubricating oil leaks.