0324048 JOHNSON EXHAUST HOUSING, Inner

This procedure must only be used to remove and install the main bearing shells with the crankshaft in position.The removal procedure and the installation procedure must be completed for each pair of main bearing shells before the next pair of main bearing shells are removed.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Make sure that the main bearing caps are marked for the location and direction for installation. The main bearings and the main bearing caps must be installed in the same location.
Illustration 1 g00947823
Remove the setscrews (1) and the main bearing cap (2) from the cylinder block.
Illustration 2 g01154163
When the center main bearing cap is removed, remove the lower half of thrust washer (3) from the center main bearing cap.
Illustration 3 g01154166
Remove the lower main bearing shell (4) from the main bearing cap (2). Keep the main bearing and the main bearing cap together for proper installation. Note: The lower main bearing shell is a plain bearing that has no oil holes.
Illustration 4 g01154159
For the center main bearing, remove the upper half of thrust washer (5) from each side of the main bearing in the cylinder block with a suitable tool. Carefully rotate the crankshaft while you push on the thrust washer (5). If necessary, move the crankshaft to the front or to the rear in order to loosen a tight thrust washer.
Illustration 5 g01154162
Push the upper main bearing shell (6) from the opposite side of the bearing tab with a suitable tool. Carefully rotate the crankshaft while you push on the bearing. Remove upper main bearing shell (6) from the cylinder block. Keep the two bearing shells together in order to ensure proper installation. Installation Procedure
This procedure must only be used to remove and install the main bearing shells with the crankshaft in position.The removal procedure and the installation procedure must be completed for each pair of main bearing shells before the next pair of main bearing shells are removed.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that the main bearing shells are clean and free from wear or damage. If necessary, replace the main bearing shells.
Illustration 6 g01154162
Lubricate the crankshaft journal and the upper main bearing shell (6) with clean engine oil. Slide the upper main bearing shell (6) into position between the crankshaft journal and the cylinder block. Ensure that the locating tab for the upper main bearing shell is correctly seated in the slot in the cylinder block. Note: The upper main bearing shell has a groove and two oil holes.
Illustration 7 g01154159
For the center main bearing, ensure that the thrust washers (3 and 5) are clean and free from wear or damage. If necessary, replace the thrust washers. Lubricate the thrust washers (5) with clean engine oil.Slide the thrust washers (5) into position between the crankshaft and the cylinder block.Note: The grooves on the thrust washer must be located against the crankshaft.
Illustration 8 g01154804
Install the lower main bearing shell (4) into the main bearing cap (2). Ensure that the locating tab for the lower main bearing shell is correctly seated into the slot in the bearing cap. Note: The lower main bearing shell i