N14 Base Engine Troubleshooting and Repair Manual – 001-007   Bearings, Thrust

1. Drain the lubricating oil. Refer to Procedure

   007-025-005.

2. Remove the lubricating oil pan. Refer to Procedure

   007-025-002.

WARNING  Used engine oil has been identified by the state of California as causing cancer and reproductive toxicity. Do not breathe, ingest or excessively contact used engine oil.

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.

3. Remove the No. 7 main bearing cap capscrews and washers.

NOTE: The No. 7 main bearing cap has thrust bearings and dowel pins.

NOTE: The service tool listed below

must
be centered on the cap.

4. Use the main bearing cap puller, Part No. ST-1178, to remove the cap.

5. Remove the thrust bearings from the No. 7 cap.
6. Mark these bearings as the bottom front and the bottom rear thrust bearings.

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

7. Use a blunt tool to remove the upper thrust bearings.
8. Mark these bearings as the top front and the top rear thrust bearings.

1. Visually inspect the main cap and capscrews for damage.
2. Visually inspect the thrust bearings for nicks, scratches, or damage.

NOTE: If the main bearings are damaged, refer to the Engine Shop Manual to inspect the crankshaft main bearing journals. If the crankshaft is damaged, the engine

must
be removed for repair. Refer to Procedure

000-001-999.

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

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

2. Install the upper thrust bearings in the No. 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.

3. Use clean Lubriplate® 105 or its 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.

4. Install the lower thrust bearings in the No. 7 main bearing cap as shown.

5. Use clean 15W-40 oil to lubricate the capscrew threads and the flat washers.
6. 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.

7. Install the main bearing caps as follows:

1. 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.

1. Install the capscrews and the washers through the cap and into the cylinder block.
2. Use your hand to tighten the capscrews two to three threads.

NOTE: When hitting the cap, make sure the bearing shell and dowel ring do

not
move.

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

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

1. Tighten both to 122 N•m [90 ft-lb].
2. Tighten both to 230 N•m [170 ft-lb].
3. Tighten both to 346 N•m [255 ft-lb].
4. Loosen both completely.
5. Repeat steps a. through c.

9. Replace the main bearing shells No. 1 through No. 6.

NOTE: Main bearings No. 1 through No. 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-inch] to 0.45 mm [0.018-inch].

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-inch]

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

1. If the crankshaft end play is more than 0.56 mm [0.022-inch], the crankshaft

   must
   be removed from the engine and repaired. Refer to the Alternative Repair Manual, Bulletin No.

   3379035.

10. Install the lubricating oil pan. Refer to Procedure

    007-025-026.

CAUTION  The lubricating oil system must be primed before operating the engine after any internal engine repairs to avoid internal component damage.

11. Remove the temperature sensor from the lubricating oil pump cover.
12. Prime the lubricating system. Refer to Procedure

    007-037-050.

13. Fill the engine with lubricating oil. Refer to Procedure

    007-025-028.

14. Operate the engine until it reaches a temperature of 82°C [180°F], and check for lubricating oil leaks.