Crankshaft
DISASSEMBLY
1. Remove the timing belt, front case, flywheel 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 permit reassembly in the original position and direction.
4. Remove the main bearing caps and remove the crankshaft. Keep the bearings in order by cap number.
5. Remove the crankshaft position sensor wheel.
INSPECTION
Crankshaft
1. Check the crankshaft journals and pins for damage, uneven wear and crack. Also check oil holes for clogging. Correct or replace any defective part.
2. Inspect out-of-roundness and taper of crankshaft journal and pin.
Standard value:
Crankshaft journal O.D: 50 mm (1.9685 inch)
Crankshaft pin O.D: 45 mm (1.7717 inch)
Crankshaft journal, pin out-of-roundness and taper: 0.01 mm (0.0004 inch) or less
Main Bearings and Connecting Rod Bearings
Visually inspect each bearing for peeling, melting, seizure and improper contact. Replace the defective bearings.
Oil Clearance Measurement
To check the oil clearance, measure outside diameter of the crankshaft journal and the crank pin, and inside diameter of the bearing. The clearance measurement is the difference between the measured outside and inside diameters.
Standard value:
Crankshaft main bearing: 0.028-0.048 mm (0.0011-0.0018 inch)
Connecting rod bearing: 0.024-0.044 mm (0.0009-0.0017 inch)
Limit: 0.1 mm ( 0.0039 inch)
Oil Clearance Measurement (Plastic gauge Method)
Plastic gauge may be used to measure the clearance.
1. Remove oil, grease and any other dirt from bearings and journals.
2. Cut plastic gauge to the same length as long as the width of the bearing and place it in parallel with the journal, away from oil holes.
3. Install the crankshaft, bearings and caps.Tighten them to the specified torques. During this operation, do not turn the crankshaft. Remove the caps. Measure the width of the plastic gauge at the widest point using the scale printed on the gauge package. If the clearance exceeds the service limit, the bearing should be replaced or an undersize bearing be used. When installing a new crankshaft, be sure to use a standard size of bearings.Should the standard clearance not be obtained even after replacing the bearing, the journal should be ground to the recommended undersize, and a bearing of the same size should be installed.
Oil Seal
Check front and rear oil seals for damage or worn lips. Replace any defective seal.
Bearing Caps
After installing the bearing caps, make sure that the crankshaft turns smoothly and the end play is correct. If the end play exceeds the service limit, replace the crankshaft bearing.
Standard value: 0.06-0.26 mm (0.0023-0.010 inch)
Limit: 0.30 mm (0.0118 inch)
Sensor wheel
1. Remove the crankshaft sensor wheel.
2. Check the crankshaft sensor wheel for damage, crack and wear. Replace if necessary.
3. Check the clearance between crankshaft sensor wheel and crank position sensor with depth gauge.
Standard value:
Clearance between crankshaft sensor wheel and crank position sensor: 0.5-1.5 mm (0.020-0.059 inch)
NOTE:
1) Measure the depth of the top of sensor wheel tooth and the outside of transaxle housing.
2) Measure the difference between sensor length and depth.
3) Sensor length is the distance between the end of sensor and inner point of contacting face.
REASSEMBLY
1. Install the upper main bearing inserts in the cylinder block.
When reusing the main bearings, remember to install them by referring to the location marks made when disassembling.
2. Install the crankshaft. Apply engine oil to the journals.
3. Install bearing caps and tighten cap bolts to the specified torque in the sequence of the center, No.2, No.4 front and rear caps.Cap bolts should be tightened evenly in from 2 to 3 stages before they are tightened to the specified torque.The caps should be installed with the arrow mark directed toward the crank pulley side of engine. Cap numbers must be correct.
Tightening torque
Main bearing cap bolt: 55-60 Nm (550-600 kgf-cm, 40-43.4 ft. lbs.)
Connecting rod cap bolt: 32-35 Nm (320-350 kgf-cm, 23-28 ft. lbs.)
4. Make certain that the crankshaft turns freely and has the proper clearance between the center main bearing thrust flange and the connecting rod big end bearing.
Standard value:
Crankshaft end play: 0.05-0.175 mm (0.002-0.005 inch)
5. Using the special tool, crankshaft rear oil seal installer (09231-11000) as shown, install the oil seal in the crankshaft rear oil seal case. Press fit the oil seal being careful not to align it wrong.
6. Install the rear plate and tighten the bolts.
7. Install the connecting rod caps.
8. Install the flywheel, front case, oil pan and timing belt.