Crankshaft and Main Bearings Replace Opel Antara I

Crankshaft and Main Bearings Replace

Remove

1. Remove the engine assembly. For MY 2007, refer to Engine Assembly Replace . From MY 2008, refer to Engine Assembly Replace .
2. Remove both cylinder head assemblies. Refer to Cylinder Head Assembly Replace .
3. Remove the oil pan assembly. Refer to Oil Pan Assembly Replace .
4. Remove the piston and connecting rod assemblies. Refer to Piston and Connecting Rods Assembly Replace .
5. Remove the oil pump assembly. Refer to Oil Pump Assembly Replace .
6. Remove the crankshaft rear oil seal and plate assembly. Refer to Crankshaft Rear Seal and Plate Assembly Replace .
7. Remove the crankshaft position sensor. Refer to Crankshaft Position (CKP) Sensor Replace .

Measure

1. Place a dial indicator at the end of the crankshaft nose.
2. Gently force the crankshaft towards the front and rear of the cylinder block with a lever while monitoring the movement of the dial indicator.
3. The crankshaft endplay should not exceed specifications.
4. If the specifications are exceeded, inspect the thrust bearing thrust outer diameter and the crankshaft thrust wall for wear and/or excessive runout. Compare the values with the specifications.

Replace the thrust bearing or crankshaft as required. Disassemble

1. Remove the crankshaft bearing cap side bolts (3).

Important: The crankshaft bearing cap outer bolts are yield tightened during assembly and must be replaced prior to reassembly. Crankshaft bearing cap outer bolts that are not replaced will not torque to the correct clamp load and can lead to serious engine damage.

2. Remove the crankshaft bearing cap outer bolts (1).
3. Remove the crankshaft bearing cap inner bolts (2).

4. Loosen the nuts (1) of the crankshaft main bearing cap remover, Tool No. J-41818 (2) to separate the chamfered collets. Install the collets into the inner bolt holes of the front main bearing cap (3).
5. Tighten the remover nuts to 11 N•m (97 lb-in).
6. Install a slide hammer, Tool No. J-6125-1B (4) onto the crankshaft bearing cap remover and remove the crankshaft bearing cap.
7. Repeat steps 9 to 13 for the remaining crankshaft bearing caps.

8. Remove the crankshaft (1) from the engine block (2), lifting evenly to avoid jamming against the main thrust bearing.
9. Place the crankshaft in a secure place.

10. If required, remove the crankshaft sprocket drive pin (1) from the crankshaft (2),

11. Prepare a piece of cardboard or similar, numbered 1 - 4 for bearing identification.

Note: Main bearing journals are numbered from the front of the engine.

12. Remove the crankshaft upper bearing halves from the cylinder block. Note the position of the thrust bearing (1) at the number 3 journal (2).
13. Place the crankshaft upper bearing halves on the cardboard in the correct positions.

14. Remove the crankshaft lower bearing halves (2) from the crankshaft bearing caps (1).
15. Place the crankshaft lower bearing halves in the correct positions on the cardboard.

Clean

1. Clean the following components in solvent and then dry with compressed air:
2. crankshaft bearings, connecting rod bearings, crankshaft journals, crankpin journals, crankshaft oil passages, and crankshaft threaded holes.

Inspect

Important: All main journal bearings that have been used in a running engine must be replaced. Never re-use the crankshaft bearings or connecting rod bearings.

Note: The following bearing wear conditions should be used to diagnose engine operating conditions or root cause of a condition.

1. Inspect for fatigue indicated by craters or pockets (2). Flattened sections on the bearing halves (1) also indicate fatigue.

2. Inspect for excessive scoring or discoloration (2) on both front and back of the bearing halves (1).
3. Inspect the main bearings for dirt embedded into the bearing material.

4. Inspect for incorrect seating indicated by bright, polished sections (1).

Assemble

Important: If the crankshaft bearings have been used in a running engine, replace them with new crankshaft bearings for reassembly.

1. Clean the crankcase crank bore with a lint-free cloth.
2. Clean all the oil from the backside of new bearing halves.
3. Install the new upper crankshaft bearings into position. The thrust bearing (1) belongs in the number 3 journal (2). Ensure the upper bearing insert contains the oil transfer hole and groove. Roll the bearing into position so the lock tang engages the crank slot. The bearing must fit flush with the upper crankcase.

4. Install the new lower crankshaft bearings (2) into position in the main bearing caps (1). The lower crankshaft bearings are identified by no grooves or holes. The bearings must fit flush with the crankshaft bearing caps.

5. If removed, install the crankshaft sprocket drive pin (1). Lightly tap the pin in place with a small soft face, bronze/plastic, hammer until it bottoms in the hole.

Important: Ensure the crankshaft position sensor has been removed from the cylinder block prior to loading the crankshaft, as damage to the sensor may occur.

6. Apply a liberal amount of clean engine oil to the upper and lower bearing surfaces.
7. Gently lower the crankshaft into position in the cylinder block.

8. Install the crankshaft main bearing caps.
9. Loosely install the original inner main cap bolts (1).

Important: The outer crankshaft bearing cap bolts (2) are yield tightened during assembly and must be replaced prior to reassembly. Outer crankshaft bearing cap bolts that are not replaced will not torque to the correct clamp load and can lead to serious engine damage.

10. Loosely install the new outer main bearing cap bolts (2).
11. Gently tap the crankshaft main bearing caps with a soft-faced hammer to help seat the caps.

Note: The short / inner side main cap bolts originally have a sealant on the flange of the bolt head. New bolts must be used. If new bolts are not used, oil can leak from the crankcase past the bolts.

12. Loosely install new short / inner side main cap bolts (4).

Note: The long / outer side main cap bolts originally have a sealant on the flange of the bolt head. New bolts must be used. If new bolts are not used, oil can leak from the crankcase past the bolts.

13. Loosely install the new long / outer side main cap bolts (3).
14. Tighten the main caps bolts.

Tighten

Tighten the crankshaft main bearing cap inboard attaching bolt to 20 N•m (15 lb-ft) plus another 80°.

Tighten the crankshaft main bearing cap outboard attaching bolt to 15 N•m (11 lb-ft) plus another 110°.

Tighten the crankshaft main bearing cap side attaching bolt to 30 N•m (22 lb-ft) plus another 60°.

15. Ensure the crankshaft turns without binding or noise. Install
16. Install the crankshaft position sensor. Refer to Crankshaft Position (CKP) Sensor Replace .
17. Install the crankshaft rear oil seal and plate assembly. Refer to Crankshaft Rear Seal and Plate Assembly Replace .
18. Install the oil pump assembly. Refer to Oil Pump Assembly Replace .
19. Install the piston and connecting rod assemblies. Refer to Piston and Connecting Rods Assembly Replace .
20. Install the oil pan assembly. Refer to Oil Pan Assembly Replace .
21. Install both cylinder head assemblies. Refer to Cylinder Head Assembly Replace .
22. Install the engine assembly. For MY 2007, refer to Engine Assembly Replace . From MY 2008, refer to Engine Assembly Replace .