WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

WARNING  To reduce the possibility of personal injury, avoid direct contact of hot oil with your skin.

• Drain the lubricating oil. Refer to Procedure 007-037 in Section 7.
• Remove the lubricating oil pan. Refer to Procedure 007-025 in Section 7.

CAUTION  The main bearing caps are marked for position (1) on the camshaft side and the cylinder block identification (2) on the exhaust side. Mark any caps that are not marked before removing them from the cylinder block.

Remove the number 7 main bearing cap capscrews and washers.

NOTE: The number 7 main bearing cap has thrust bearings and dowel pins.

NOTE: The service tool listed below must be centered on the cap.

Use the main bearing cap puller, Part Number ST-1178, to remove the cap.

Remove the thrust bearings from the number 7 cap.

Mark these bearings as the bottom front and the bottom rear thrust bearings.

CAUTION  Do not damage the crankshaft when removing the thrust bearings.

Use a blunt tool to remove the upper thrust bearings.

Mark these bearings as the top front and the top rear thrust bearings.

Inspect the main cap and capscrews for damage.

Inspect the thrust bearings for nicks, scratches, or other damage.

NOTE: If the main bearings are damaged, inspect the crankshaft main bearing journals. If the crankshaft is damaged, the engine must be removed for repair. Refer to Procedure 000-001 in Section 0.

Use clean Lubriplate® 105, or equivalent, to lubricate the upper thrust bearings.

CAUTION  The grooves must be toward the crankshaft. Incorrect thrust bearing installation will result in engine damage.

Install the upper thrust bearings in the number 7 main bearing saddle.

NOTE: Push the crankshaft toward the rear of the engine to install the front bearing and to the front of the engine to install the rear bearing.

Use clean Lubriplate® 105, or equivalent, to lubricate the lower thrust bearings.

CAUTION  The grooves of the thrust bearing must be toward the crankshaft. The locating dowels must not protrude above the thrust bearing surface. Incorrect thrust bearing installation will result in engine damage.

Install the lower thrust bearings in the number 7 main bearing cap as illustrated.

Use clean 15W-40 oil to lubricate the capscrew threads and the flat washers.

Drain the excess oil from the capscrews before installing them.

CAUTION  The main bearing caps are marked for position (1) on the camshaft side and the cylinder block identification (2) on the exhaust side. The cylinder block identification number (3) is stamped on the pan rail on the camshaft side of the block. Install the caps in the correct position with the position number to the camshaft side and its part number toward the rear of the engine. Installation of main bearing caps into incorrect positions will result in severe engine damage.

Install the main bearing caps as follows:

Align the capscrew holes in the cap with the holes in the cylinder block. Make sure the ring dowel and the lower bearing shell are in position.

Install the capscrews and the washers through the cap and into the cylinder block.

Hand tighten the capscrews two to three threads.

NOTE: When hitting the cap, make sure the bearing shell and dowel ring do not move.

Hit the cap with a rubber mallet to push it into the correct position.

Tighten the capscrews on a main bearing cap to the following torque values:

Replace the main bearing shells number 1 through number 6.

NOTE: Main bearings number 1 through number 6 do not have thrust bearings.

Measure the crankshaft end clearance. The end clearance specification for a new or reground crankshaft with new thrust bearings is 0.10 mm [0.004 in] to 0.45 mm [0.018 in].

NOTE: Crankshafts that have been reground on the thrust bearing surfaces are marked for oversize thrust bearings on the rear crankshaft counter weight. If the crankshaft counter weight is marked, check the thrust ring part number to make sure the correct thrust ring size is used.

Example: F-.010 = Front 0.25 mm [0.010 in]

Example: R-.020 = Rear 0.51 mm [0.020 in]

If the crankshaft end play is more than 0.56 mm [0.022 in], the crankshaft must be removed from the engine and repaired. Refer to the Alternative Repair Manual, Bulletin Number 3379035.

WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

WARNING  To reduce the possibility of personal injury, avoid direct contact of hot oil with your skin.

• Install the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• Fill and prime the lubricating oil system. Refer to Procedure 007-037 in Section 7.
• Operate the engine until it reaches a temperature of 82°C [180°F], and check for lubricating oil leaks.