63. Crankshaft and Bearings Installation
Crankshaft and Bearings InstallationTools Required
- J45059 Angle Meter
Important:
- Crankshaft bearing clearances are critical.
Excessive crankshaft bearing clearance may effect crankshaft position sensor signals and/or On-Board Diagnostics (OBD) II system performance.
- Crankshaft bearing caps must be installed to the proper location and direction.
- When installing the crankshaft bearings, align the locating tabs on the bearings with the locating notches in the engine block journal bore and the bearing cap.
- Always install crankshaft bearings with their machined partner. Do not file bearings or mix bearing halves.
- To prevent engine block oil leakage, install NEW Me crankshaft bearing cap side bolts.
The crankshaft bearing cap Me side bolts have a sealant patch applied to the bolt flange.
1. Install the crankshaft thrust bearings to the engine block and center bearing cap.
2. Install the remaining crankshaft bearings to the engine block and bearing caps.
3. Lubricate the bearing surfaces and crankshaft journals with clean engine oil.
Notice: To maintain proper crankshaft end play, use extreme care during crankshaft installation. Avoid scoring or damaging the thrust bearing.
4. Install the crankshaft.
Important: The bearing caps must be installed in the proper location and direction.
5. Install the crankshaft bearing caps, with bearings, into the engine block.
6. Start the M10 bolts and bolt/studs.
7. Tap the bearing caps into place with a plastic-face hammer.
8. Install the NEW M8 bearing cap side bolts.
Notice: Refer to Fastener Notice in Service Precautions.
9. Tighten the bearing cap bolts and studs.
Tighten the inner M10 bearing cap bolts first pass in sequence to 20 Nm (15 lb ft).
Important: To properly align the crankshaft thrust bearings, the final thrust of the crankshaft MUST be in the forward direction.
10. Using a plastic faced hammer, tap the crankshaft rearward then forward to align the thrust bearings.
10.1. Tighten the inner M10 bolts final pass in sequence 80 degrees using the J45059.
10.2. Tighten the outer M10 bolts studs first pass in sequence to 20 Nm (15 lb ft).
10.3. Tighten the outer M10 bolts/studs final pass in sequence 51 degrees using the J45059.
10.4. Tighten the bearing cap side M8 bolts to 25 Nm (18 lb ft).
Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap.
11. Install the crankshaft position sensor.
11.1. Inspect the crankshaft position sensor O-ring seal. If the O-ring seal is not cut or damaged, it may be used.
11.2. Coat the O-ring seal with clean engine oil.
11.3. Install the sensor. Align the notch in the sensor retaining bracket with the bolt hole in the block.
11.4. Install the sensor bolt.
Tighten the crankshaft position sensor bolt to 25 Nm (18 lb ft).
12. Measure the crankshaft end play.
12.1. Thrust the crankshaft forward or rearward.
12.2. Insert a feeler gage between the center crankshaft bearing and the bearing surface of the crankshaft and measure the bearing clearance.
The proper crankshaft end play clearance is 0.04 - 0.2 mm (0.0015 0.0078 inch).
12.3. If the bearing clearance is not within specifications, inspect the thrust surfaces for nicks, gouges or raised metal. Minor imperfections may be removed with a fine stone.