Main Bearing Cap Bolt Tightening Sequence (4-cylinder engines)
Main Bearing Cap Bolt Tightening Sequence (6-cylinder engines)
Tightening sequence of side bolts of main bearing caps (6-cylinder engines)
Checking the lubrication clearance of the main bearings
1. Install new main bearing shells.
2. Clean the crankshaft, bearings and oil holes, then carefully install the crankshaft onto the bearings.
3. Place a piece of plastic on each of the main bearings along the shaft axis.
4. Install the main bearing caps, being careful not to move the plastic. Tighten the cap mounting bolts to the specified tightening torque in the sequence shown (see Fig. Main Bearing Cap Bolt Tightening Sequence (4-cylinder engines), fig. Sequence of tightening the bolts of the main bearing cap block (6-cylinder engines), fig. Sequence of tightening the side bolts of the main bearing caps (6-cylinder engines). Do not turn the crankshaft.
5. On 6-cylinder engines, after you have tightened the bolts to the specified first stage torque, tighten them an additional quarter turn.
6. Unscrew the bolts and carefully remove the covers.
7. Compare the width of the crushed film with a special scale to determine the size of the lubrication gap.
8. If the clearance does not meet the specifications, install liners of a different size. If necessary, the bearings can be ground.
9. Carefully remove any traces of film from the shaft and bearings.
Final installation of the crankshaft
1. Carefully remove the crankshaft.
2. Clean the bearing surfaces and lubricate them with grease or engine oil. Check that the crankshaft bearings are clean and install the crankshaft. Lubricate and install the lower bearings. Install the thrust half rings.
3. In 4-cylinder engines, install thrust half rings in the third bearing cap, and in 6-cylinder engines, in the second bearing cap.
4. Install the main bearing caps. The arrows on the caps should point toward the front of the engine. Insert and tighten all main bearing cap bolts to the specified torque in the sequence shown (see Fig. Main Bearing Cap Bolt Tightening Sequence (4-cylinder engines), fig. Sequence of tightening the bolts of the main bearing cap block (6-cylinder engines), fig. Sequence of tightening the side bolts of the main bearing caps (6-cylinder engines).
5. Be sure to install new sealing washers on the side hex bolts.
6. Turn the crankshaft by hand several times and check for ease of movement.
7. Check the crankshaft end play and install the rear oil seal.