Crankshaft Main Bearing: Service and Repair
Crankshaft Main Bearing Carrier
Service Repair No - 12.21.42
The content of this article reflects the changes identified in TSB - LTB00119
Special Tools
Removal
1. Disconnect the battery gound cable.
2. Remove the oil pump.
3. Mount the engine to an engine stand.
4. Release the starter motor.
^ Remove the bolt.
5. Remove the starter.
^ Release the battery positive cable cover
^ Remove the nut
^ Disconnect the battery positive cable
^ Disconnect the electrical connector
6. Remove the special tool.
7. Remove the flexplate.
^ Remove and discard the 8 bolts.
8. Remove the baffle plate.
^ Remove the 6 bolts
CAUTION: To make sure damage does not occur to the crankshaft and piston components, the engine must be inverted on the engine stand. Failure to follow this instruction may result in damage to the engine.
NOTE: If the crankshaft main carrier bearing retaining bolts have been marked with a center punch dot, they must be discarded and new bolts installed.
9. Remove the crankshaft main bearing carrier.
^ Remove the crankshaft main bearing carrier retaining bolts in the indicated sequence.
10. Remove and discard the rear crankshaft oil seal.
Installation
CAUTION: Use only a plastic scraper when removing the sealing material.
CAUTION: If any new bolts are to be installed to retain the crankshaft main bearing carrier, pre-stress the retainning bolts by installing the crankshaft main bearing carrier without any sealant and tighten the new retaining bolts to the specificed torque. Remove the crankshaft main bearing carrier once all of the bolts have been pre-stressed. Failure to follow this instruction may result in damage to the engine.
1. Clean all mating faces and reusable parts thoroughly and check for damage.
2. Apply a 2 mm (0.08 in.) bead of sealant to the cylinder block in the areas shown.
NOTE: Install the crankshaft main bearing carrier and tighten bolts to specification within 20 minutes of applying sealant.
3. Apply a 1 mm (0.039 in.) bed of sealant to cylinder block in the area shown.
CAUTION: Make sure all dowels are fully seated into the crankshaft main bearing carrier prior to tightening the bolts.
NOTE: Do not rotate the crankshaft until all retaining bolts are tightened to specification. Do not lubricate the crankshaft main bearing carrier retaining bolts.
NOTE: Install the crankshaft main bearing carrier and tighten bolts to specification within 20 minutes of applying sealant.
NOTE: Tighten the retaining bolts in the sequence shown.
4. Install the crankshaft main bearing carrier to cylinder block
Stage 1: Bolts 21 to 32, tighten to 15 Nm (11 ft. lbs.)
Stage 2: Bolts 33 to 34, tighten to 15 Nm (11 ft. lbs.)
Stage 3: Bolts 1 to 10, tighten to 25 Nm (18 ft. lbs.)
Stage 4: Bolts 11 to 20, tighten to 15 Nm (11 ft. lbs.)
Stage 5: Bolts 1 to 10, tighten to 35 Nm (26 ft. lbs.) and then a further 135°
Stage 6: Bolts 11 to 20, tighten to 20 Nm (15 ft. lbs.)and then a further 150°
Stage 7: Bolts 21 to 32, tighten to 20 Nm (15 ft. lbs.)and then a further 90°
Stage 8: Bolts 33 to 34, tighten to 20 Nm (15 ft. lbs.)and then a further 150°
Stage 9: Center punch each bolt head to indicate it has be reused.
5. Remove the special tool from the left-hand cylinder head.
6. Remove the special tool from the right-hand cylinder head.
CAUTION: Make sure that number 1 cylinder intake camshaft lobes are vertical to the cylinder head face.
7. Position the right-hand camshafts to a neutral position.
CAUTION: Make sure that number 2 cylinder exhaust camshaft lobes are vertical to the cylinder head face.
8. Position the left-hand camshafts to the neutral position.
CAUTION: Make sure no binding of the crankshaft occurs.
CAUTION: Make sure the spark plugs are removed to enable the engine to rotate freely.
9. Carefully rotate the crankshaft two complete turns to check for correct operation.
CAUTION: Do not rotate the crankshaft counter-clockwise. Rotate the crankshaft clockwise to position the engine to top dead center (TDC) No 1 cylinder
10. Install the special tool.
11. Install the special tool to the left-hand cylinder head.
12. Install the special tool to the right-hand cylinder head.
13. Remove excess sealant which may squeeze out of front cover sealing surfaces.
14. Install the baffle plate.
^ Tighten to 6 Nm (4 ft. lbs.)
NOTE: Make sure the transit sleeve is correctly positioned and install the new seal over the crankshaft. Do not use any lubricant on the seal, transit shaft or the crankshaft.
NOTE: Carefully remove the transit sleeve, leaving the seal in place.
15 Using the special tool, position the crankshaft rear oil seal.
CAUTION: Alternate the nut tightening to correctly seat the crankshaft rear oil seal.
16. Using the special tool, install the crankshaft rear oil seal.
17. Remove the special tool.
NOTE: Prevent the flexplate from rotating.
18. Install the flexplate.
^ Clean component manting faces.
^ Tighten the bolts evenly in 2 stages to the sequence shown
^ Tighten the bolts to 15 Nm (11 ft. lbs.)
^ Tighten the bolts to 110 Nm (81 ft. lbs.)
19. Remove special tools.
20. Connect the positive battery cable and the switch lead to the starter motor solenoid.
^ Connect the electrical connector.
^ Connect the battery positive cable.
^ Install the battery positive cable cover.
21. Install the starter motor.
^ Clean the mating faces.
^ Tighten the bolt to 45 Nm (33 ft. lbs.)
22. Remove the engine from the engine stand.
23. Install the oil pump.
24. Connect the negative battery cable.