Crankshaft: Service and Repair

DISASSEMBLY
1. Remove the timing belt train, front case, flywheel cylinder head assembly and oil pan. For details, refer to respective chapters.
2. Remove the rear plate and the rear oil seal.
3. Remove the connecting rod caps.

NOTE: Mark the main bearing caps to permit reassembly in the original position and direction.

4. Remove the main bearing caps and remove the crankshaft.

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 part.
2. Inspect for out-of-roundness and taper of the crankshaft journal and pinch

Standard value:
Crankshaft journal O.D: 59.980 - 60.000 mm (2.3614 - 2.3622 inch)
Crankshaft pin O.D: 49.980 - 50.000 mm (1.9677 - 1.9685 inch)

Main Bearings and Connecting Rod Bearings
Visually inspect each bearing for peeling, melt, seizure and improper contact. Replace any defective bearings.

Oil Clearance Measurement





To 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.

Oil clearance:
Standard value:
Main bearing: 0.02 - 0.048 mm (0.0008 - 0.0019 inch)
Connecting rod bearing: 0.016 - 0.046 mm (0.0006 - 0.0018 inch)

Plastiqauge Method
Plastigauge may be used to measure the clearance.





1. Remove oil and grease and any other dirt from the bearings and journals.
2. Cut the plastigauge to 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 repair 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. Should the standard clearance not be obtained even after bearing replacement, the journal and pin should be ground to undersize and a bearing of the corresponding undersize 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
Replace distorted, damaged, or cracked drive plates.

REASSEMBLY





1. Install grooved main bearing (upper bearing) on cylinder block side.
2. Install grooveless main bearing (lower bearing) on main bearing cap side.
3. Install crankshaft. Apply engine oil to journal and pinch
4. Install caps with arrow mark directed toward front of engine. Cap number must be correct.
5. Tighten cap bolts to specified torque.

Tightening torque:
Main bearing cap bolts: 75 - 85 Nm (750 - 850 kgs.cm, 55 - 61 ft. lbs.)





6. Cap bolts should be tightened evenly in 4 to 5 stages before they are tightened to specified torque.
7. Make certain that crankshaft turns freely and has proper end play.

Crank shaft end play:
Standard: 0.05 - 0.25 mm (0.0020 - 0.0098 inch)
Limit: 0.3 mm (0.012 inch)





8. Using special tool(09231-33000), install the rear oil seal in oil seal





9. Apply sealant to the area shown in the illustration. Install the oil seal case in the cylinder block.

Tighten torque:
Oil seal case bolt: 10 - 12 Nm (100 - 120 kgs.cm, 7.3 - 8.6 ft. lbs.)





10. Tighten the transaxle mounting plate to the specified torque.

Tightening torque:
Transaxle mounting plate bolt: 10 - 12 Nm (100 - 120 kgs.cm, 7.3 - 8.6 ft. lbs.)

11. Tighten the drive plate and the adapter plate.

Drive plate and adaptor plate bolt: 73 - 77 Nm (730 - 770 kgs.cm, 53 - 55 ft. lbs.)