Crankshaft: Service and Repair

REMOVAL
1. Follow removal procedure outlined in illustration, noting the following:

CAUTION:
a. Be careful not to damage the cylinder wall.
b. Never reuse the removed oil jet.





2. Use an appropriate metal bar to press the oil jet out.

INSTALLATION
1. Follow removal procedure in reverse order noting the following.





2. Use a pin punch of 4 - 5 mm (0.15 - 0.20 inch) diameter to press the oil jet in from the crank journal until the oil jet bottoms on.
3. When the bearing needs replacing, select and install a proper bearing by the following procedure.








a. Measure the crankshaft journal diameter and confirm its classification from the table. In the case of a crankshaft supplied as a service part, its identification colors of its journals are painted at the position shown in the illustration.





b. The cylinder block bearing bore diameter identification marks are stamped at the position shown in the illustration numerically from the front of the engine, beginning at No. 1.
c. Select a proper bearing from the illustration on the basis of the identification data confirmed under items a and b.

Example
- If the measured value of a crankshaft journal outer diameter is between 56.994 - 57.000 mm (2.2439 - 2.2441 inch), the journal is classified as "1" in the illustration. In case the crankshaft is also replaced by a spare part, check the identification colors of the journals painted on the new crankshaft. If the color is yellow, for example, the journal is classified as "1".
- Next, check the cylinder block bearing hole identification mark stamped on the cylinder block. If it is "0", read the "bearing identification mark" column to find the identification mark of the bearing to be used. In this case, it is "1".





d. Install the bearings having an oil groove to the cylinder block.
e. Install the bearings having no oil groove to the bearing caps.
4. Install the bearing cap so that its arrow faces toward the timing belt.





5. When installing the bearing cap bolts, check that the shank length of each bolt meets the limit (A): maximum 71.1 mm (2.79 inch). If the maximum limit is exceeded, replace the bolt.
6. Apply engine oil to the bolt thread and contact surface.





7. Tighten the bolts to 25 Nm (18 ft. lbs.) according to the tightening sequence.
8. Mark the bolt head by paint.

CAUTION:
- If the tightening angle is less than 90°, the bolt will be loosened. Be careful to observe the tightening angle.
- If the tightening angle is more than 100°, remove the bolt and repeat the procedure from step 5.

9. Use the painted marks on the bolts as a reference, make a painted mark at the base of the washer in a position 90 - 100° in the direction of tightening from the painted mark on the bolt.
10. Tighten the bearing cap bolts 90 - 100° in the correct tightening sequence, and then check that the painted marks are aligned.





11. After installing the bearing cap, make sure that the crankshaft turns smoothly and the end play is correct. If the end play exceeds 0.05 - 0.18 mm (0.0020 - 0.0071 inch), replace the No.3 crankshaft bearing (thrust bearing). The wear limit is 0.25 mm (0.0098 inch).




12. Using the oil seal installation tool Nos. MB990938 and MD998376, or equivalents, press-fit the oil seal into the crankshaft rear oil seal case.

NOTE: Always use a new oil seal.





13. When installing the oil seal case, be sure to use Mitsubishi Genuine Part No. MD970389, or equivalent sealant.

NOTE:
- Be sure to install the case quickly while the sealant is wet (within 15 minutes).
- After installation, keep the sealed area away from the oil and coolant for approximately 1 hour.