N14 Base Engine Troubleshooting and Repair Manual – 001-008   Camshaft

Remove the accessory drive pulley. Refer to Procedure

009-004-002.

Remove the vibration damper and the crankshaft pulley. Refer to Procedures

001-052-002 and

001-022-002, respectively.

Remove the front crankshaft seal and the accessory drive seal. Refer to Procedures

001-023-002 and

001-003-002, respectively.

Remove the gear cover. Refer to Procedure

001-031-002.

Remove the cam follower assemblies. Refer to Procedure

004-001-002.

Install four camshaft pilots, Part No. 3824285, over the outer base circle of the valve lobes between the camshaft journals.

Use a rubber band to hold the installation pilots in place. The rubber band

must
straddle the valve lobe.

Use one hand to slowly rotate and pull the camshaft from the cylinder block and the other hand to balance the camshaft as it is removed.

Remove the camshaft thrust washer from the camshaft.

Clean the camshaft with solvent, and dry with compressed air.

NOTE: After the camshaft has been steam cleaned, do

not
touch the machined surfaces with bare hands. This will cause rust to form. Lubricate the camshaft with clean 15W-40 oil before handling.

Use a feeler gauge to measure the clearance between the gear and the shoulder on the camshaft.

NOTE: The clearance

must not
exceed 0.13 mm [0.005-inch].

Measure the seven camshaft bushing journals.

Replace the camshaft if the journal dimensions do

not
meet specifications.

Visually inspect the camshaft lobes for cracks, scratches, or other damage.

Measure the camshaft thrust washer.

Replace the thrust washer if it does

not
meet specifications.

Measure the camshaft bushings in the cylinder block. Refer to Procedure

001-010-026.

Apply a film of Lubriplate® 105 or its equivalent to both sides of the camshaft thrust washer.

CAUTION  The oil grooves on the thrust washer must be toward the camshaft gear to prevent thrust washer failure.

Install the thrust washer onto the camshaft.

Install four camshaft pilots, Part No. 3375268, over the outer base circle of the valve lobes between the camshaft journals.

Use a rubber band to hold the installation pilots in place. The rubber band

must
straddle the valve lobes.

Apply a film of Lubriplate® 105 or its equivalent to the camshaft journals and the camshaft bushings.

Rotate the camshaft slowly as it is being installed into the cylinder block.

Align the “O” mark on the camshaft gear with the “O” mark on the crankshaft gear.

Align the timing marks on the camshaft gear with the timing marks on the accessory drive gear.

After aligning the “O” marks, push the camshaft into the bore until the thrust washer fits against the cylinder block.

Remove the camshaft installation pilots. Do

not
allow the rubber bands to fall into the camshaft cavity of the cylinder block when removing the installation pilots.

Use a dial indicator to check the backlash between the camshaft gear and the crankshaft gear.

Put the tip of the dial indicator against a tooth on the camshaft gear.

Turn the camshaft gear by hand as far as it will freely move, and set the dial indicator at “0” (zero).

Turn the camshaft gear by hand in the

opposite
direction as far as it will freely move, and read the dial indicator.

If the backlash is excessive, inspect the camshaft and crankshaft gears for tooth wear and replace if necessary. If the backlash is tight, inspect for debris or damage to the gear teeth and check again.

Install the gear cover. Refer to Procedure

001-031-026.

Install the front crankshaft seal. Refer to Procedure

001-023-026.

Install the accessory drive seal at this time. Refer to Procedure

001-003-026.

Lubricate the valve and the injector camshaft lobes with 15W-40 lubricating oil, and install the cam follower assemblies. Refer to Procedure

004-001-026.

Install the crankshaft pulley and the vibration damper. Refer to Procedures

001-022-026 and

001-052-026, respectively.

Install the accessory drive pulley. Refer to Procedure

009-004-026.

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