Crankshaft

DISASSEMBLY
1. Remove the timing belt train, front case, cylinder head assembly and oil pan.
2. Remove the rear plate and the rear oil seal.
3. Remove the connecting rod caps.

NOTE: Mark the main bearing caps to be able to reassemble in the original position and direction.

4. Remove the main bearing caps and remove the crankshaft. Keep the bearings in order according to the cap number.

INSPECTION
CRANKSHAFT
1. Check the crankshaft journals and pins for damage, uneven wear and cracks. Also check the oil holes for restrictions. Repair or replace any defective parts.





2. Inspect the crankshaft journal and pin for out-of-round and taper.
Standard value
Crankshaft journal O.D: 63.982 - 64.00 mm (2.519 - 2.5197 inch)
Crankshaft pin O.D: 54.982 - 55.00 mm (2.165 - 2.1653 inch)

MAIN BEARINGS AND CONNECTING ROD BEARINGS
Visually inspect each bearing for peeling, melting, seizure and improper contact. Replace any defective bearings.

MEASURING OIL CLEARANCE





Check for oil clearance by measuring the outside diameter of the crankshaft journal and the inside diameter of the bearing. The clearance can be obtained by calculating the difference between the measured outside diameters.
Standard value
Oil clearance
Crankshaft main bearing: 0.022 - 0.040 mm (0.0009 - 0.0016 inch)
Connecting - rod bearing: 0.026 - 0.044 mm (0.001 - 0.0017 inch)

PLASTIGAUGE METHOD
Plastigauge may be used to measure the clearance.
1. Remove oil, grease and any other dirt from the bearings and journals.
2. Cut the plastigauge the same length as the width of the bearing and place it in parallel with the journal, avoiding the oil holes.





3. Install the crankshaft, bearings and caps and tighten them to the specified torques. During this operation, do not turn the crankshaft. Remove the caps. Measure the width of the plastigauge at the widest part by using the scale printed on the gauge package.
If the clearance exceeds the service limit, the bearing should be replaced or an undersize bearing should be used. When installing a new crankshaft, be sure to use standard size bearings.
If the standard clearance can not be obtained even after replacing the bearing, the journal and pin should be ground to the undersize and a bearing of the corresponding size should be installed.

OIL SEAL
Check the front and rear oil seals for damage or worn surfaces. Replace any seat that is defective.

DRIVE PLATE (Air)
Replace distorted, damaged, or cracked drive plates.

REASSEMBLY
MAIN BEARING
1. Install a grooved main bearing (upper bearing) on the cylinder block side.
2. Install a grooveless main bearing (lower bearing) on the main bearing cap side.
3. Install the crankshaft. Apply engine oil to journal and pin.
4. Install the bearing caps with the arrow mark directed toward the front of the engine. Cap number must be correct.








5. Tighten the cap bolts to the specified torque.
Tightening torque
Main bearing cap bolts: 70 - 80 Nm (700 - 800 kgf-cm, 52 - 59 ft. lbs.)
6. Cap bolts should be tightened evenly in stages 4 to 5 increments before they are tightened to the specified torque.





7. Make certain that crankshaft turns freely and check the end play of the crankshaft.
Crankshaft end play
Standard: 0.050 - 0.250 mm (0.002 - 0.0098 inch)
Limit: 0.35 mm (0.014 inch)
8. Using special tool (09231-33000), install the rear oil seal in oil seal case.








9. Apply sealant to the area. Install the oil seal case in the cylinder block.
Tightening torque
Oil seal case bolt: 10 - 12 Nm (100 - 120 kgf-cm, 7 - 9 ft. lbs.)
10. Tighten the rear plate to the specified torque.
Tightening torque
Rear plate: 10 - 12 Nm (100 - 120 kgf-cm, 7 - 9 ft. lbs.)





11. Tighten the drive plate and the adapter plate (A/T).
Tightening torque
Drive plate and adapter plate bolt: 73 - 77 Nm (730 - 770 kgf-cm, 53 - 56 ft. lbs.)