Checking the main bearing pins

• Check that the cylinder liner ovalisation is within the specified limits.

• If the cylinder liner diameter is not within the specified limits, bore the cylinder liners according to the specified oversizes.

NOTE: In the case of boring all the cylinder liners must have the same oversize.

CHECKING THE MAIN BEARING PINS

1. Assemble the main bearing caps.

NOTE: The main bearings are notched consecutively (from 0 to four starting from the engine front) to define their assembly position.

1. Tighten the main bearing cap screws to the specified torque using tool no. 1.860.942.000 for angle tightening.
2. Check that the diameter of the main bearing pin seats is within the specified limits.

CHECKING THE CRANKSHAFT

• Check that the lubricating ducts of the crankshaft are not scaled or clogged.
• Check that the main bearing pin diameter is within the specified limits.

24 ÷ 26 Nm + 100°
2.5 ÷ 2.7 kgm + 100°

• If the main bearing pin diameter is not within the specified limits, grind them according to the specified undersize.

• Check that the connecting rod pin diameter is within the specified limits.

• If the connecting rod pin diameter is not within the specified limits, grind them according to the specified undersize.