| TIBURON(GK) >2003 > G 2.7 DOHC > Engine Mechanical System > Cylinder Block > Crankshaft>Repair procedures |

DISASSEMBLY
1. | Remove the timing belt train, front case, flywheel, cylinder head assembly and oil pan. For details, refer to the respective chapters.
2. | Remove the rear plate and the rear oil seal.
3. | Remove the connecting rod caps.
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
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 : 61.982 ~ 62.000mm (2.4402 ~ 2.4409in.) Crankshaft pin O.D : 47.982 ~ 48.000mm (1.8890 ~ 1.8898in)
Main Bearings and Connecting Rod Bearings Visually inspect each bearing for peeling, melting, seizure and improper contact. Replace any defective bearings. Measuring Oil Clearance
Standard value Oil clearance Crankshaft main bearing : 0.004 ~ 0.022mm (0.00015 ~ 0.00087in.) Connecting rod bearing : 0.018 ~ 0.036mm (0.00071 ~ 0.00141in.) Limit : 0.1mm (0.004 in.)
Plastic gauge Method Plastic gauge may be used to measure the clearance.
1. | Remove oil, grease and any other dirt from the bearings and journals.
2. | Cut the plastic gauge 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 plasticgauge at the widest part by usingthe 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 (A/T) Replace distorted, damaged, or cracked drive plates. FLYWHEEL (M/T) See EM section.
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 M8(9~16) : 13~19Nm (130~190kg.cm, 10~14lb.ft) + (90°~94°) M10(1~8) : 27~33Nm (270~330kg.cm, 19.5~24 lb.ft) + (90°~94°)
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 : 0.070 ~ 0.250mm (0.0028 ~ 0.0098in.) Limit : 0.4mm (0.016in.)
8. | Using special tool(09231-33000), install the rear oil seal in oil seal case.
9. | Apply sealant to the area shown in the illustration. Install the oil seal case in the cylinder block.
Tightening torque Oil seal case bolt : 10 ~ 12Nm (100 ~ 120kg.cm, 7 ~ 9 lb.ft)
10. | Tighten the rear plate to the specified torque.
Tightening torque Rear plate : 10 ~ 12Nm (100 ~ 120kg.cm, 7 ~ 9 lb.ft)
11. | Tighten the drive plate and the adapter plate (A/T).
Tightening torque Drive plate and adapter plate bolt : 73 ~ 77Nm (730 ~ 770kg.cm, 53 ~ 56 lb.ft)
12. | Tighten the fly wheel (M/T).
Tightening torque Fly wheel installation bolt : 73 ~ 77Nm (730 ~ 770kg.cm, 53 ~ 56lb.ft)