Crankshaft & Main Bearings
NOTE:
Crankshaft and main bearings size identification marks have changed after August 1995. See ENGINE TECHNICAL SERVICE BULLETIN No. 09-20-95.
- Before installing main bearing main bearing cap, hold a straightedge across threads of main bearing cap bolts. Ensure main bearing cap bolt threads contact straightedge in all areas. If threads fail to contact straightedge, bolts are stretched and must be replaced.
- Install upper main bearing shells, ensuring oil holes are in alignment and tabs are seated in block grooves.
- Crankshaft thrust washers are installed at journal No. 3. Each pair of thrust washers has one washer with a locating tab and one without. One pair of thrust washers is installed in block and one pair is installed in main bearing cap. See Fig 1.
- Apply a thin film of grease to plain side of thrust washers, and position washers on each side of No. 3 main bearing in block (grooved surface toward crankshaft). Oil bearings and journals, and install crankshaft.
- Install lower main bearing shells (without oil grooves) into main bearing cap. Install remaining pair of thrust washers into main bearing cap. Carefully install main bearing cap with arrows toward timing belt end of engine. See Fig 1.
- Oil bearing cap bolt threads, and tighten bolts in sequence and to specification. See Fig 2. See TORQUE SPECIFICATIONS .