N14 Base Engine Troubleshooting and Repair Manual – 004-001   Cam Follower Assembly

Remove the rocker lever covers. Refer to Procedure

003-011-002.

Remove the C-Brake, if equipped. Refer to Procedure

020-001-002.

Remove the rocker lever assemblies. Refer to Procedure

003-009-002.

Remove the push rods. Refer to Procedure

004-014-002.

Remove the fuel pump. Refer to Procedure

005-016-002.

Remove the air compressor (if used). Refer to Procedure

012-014-002.

Remove the accessory drive. Refer to Procedure

009-001-002.

NOTE: The fuel pump, air compressor, and accessory drive can be removed as an assembly.

Remove the cam follower housing assemblies as follows:

• Remove the six capscrews and studs from each cam follower housing.
  NOTE:
  Record the position of the studs prior to removal.
• Remove the cam follower housings and gaskets.

NOTE: To prevent increased wear, mark the cam follower housing assemblies as they are removed so they can be installed back into their original location on the block.

• Measure and record the thickness of the gaskets used between each cam follower housing and the block.
  NOTE:
  The thickness of the gaskets controls the injection timing.
• Discard the gaskets.

Remove the two locking screws.

NOTE: Each cam follower housing assembly consists of two shaft assemblies secured in a common center support with two locking screws.

Remove the two cup plugs from the housing. Refer to the Engine Shop Manual.

CAUTION  Do not push the cup plug through the cam follower lever shaft bores. The bores will be damaged.

Use expansion plug driver, Part No. 3376813, and a mallet to remove the cup plugs. Push the cup plug and the shafts through one end of the housing until the cup plug on the

opposite
end of the housing is pushed from the housing bore.

Push the shafts the

opposite
direction through the housing until the cup plug on the other end of the housing is pushed from the housing bore.

Remove the shafts and the cam follower levers from the housings.

NOTE: To prevent increased wear, mark the cam follower shafts and the levers as they are removed so they can be installed back into their original positions in the housing.

Clean the cam follower parts with solvent, and dry with compressed air.

Clean the cam follower shafts with solvent, and dry with compressed air.

Make sure the oil drillings are

not
restricted or plugged.

Visually inspect the cam follower housings for cracks or damage.

Visually inspect the locking screw holes for damaged or distorted threads.

Visually inspect the cam follower shafts for scoring or damage.

Visually inspect the locking screw holes in each shaft. The grooves

must
be clean and

not
damaged.

Visually inspect the cam followers for cracks or other damage.

Measure the cam follower roller side clearance.

NOTE: If the roller side clearance is

not
within these specifications, the roller

must
be replaced. Refer to the Engine Shop Manual.

Use a dial indicator to measure the cam follower to roller pin clearance.

NOTE: If the roller pin clearance is

not
within these specifications, the roller and the pin

must
be replaced. Refer to the Engine Shop Manual.

Visually inspect the rollers for flat spots, restriction of rotation, or other damage.

NOTE: Refer to the Engine Shop Manual for further repair or rebuild of the cam follower lever assemblies.

Visually inspect the sockets for excessive wear or damage.

A good even seating pattern

must
be seen when inspecting the cam follower socket.

When parallel grooves and scratches are observed or the contact area extends into the oil hole chamfer of the socket, the worn socket

must
be replaced.

NOTE: If excessive wear or damage is found in the sockets, Refer to Procedure

004-014-007 to inspect the push rods. Do

not
use push rods with worn balls in cam followers with new sockets.

NOTE: The N14 cam follower sockets are identified by two grooves 180 degrees apart from one another.

Use clean 15W-40 oil to lubricate the cam follower sockets.

Use clean Lubriplate® 105 or its equivalent to lubricate the bushingless cam followers and cam follower shafts.

Install the levers and the shafts in the housings back into their original locations.

Install the cup plugs in the housings as follows:

• Install two temporary capscrews in the shafts to prevent breaking the locking screws.
• Put sealant in the cup plug holes.
• Use the 7/8-inch cup plug driver (1), Part No. 3376813, to install the cup plugs.
• Remove the temporary screws.
• Install the two locking screws in the shafts.

Install the new cam follower gaskets to the block as follows:

• Obtain gaskets with the same thickness as the gaskets removed.
• Install the gaskets over the dowel pins in the block.

Oil the camshaft prior to installing the cam followers.

NOTE: The Print-o-Seal gasket

must
be against the cylinder block with the sealing bead toward the cam follower housing.

Install the cam follower assembly as follows:

• Install the capscrews and the studs in the same position from where they were removed.

• Tighten the capscrews in the alternating sequence shown to the following torque values:

Check the injection timing. Refer to Procedure

006-025-010.

Install the accessory drive. Refer to Procedure

009-001-026.

Install the air compressor (if used). Refer to Procedure

012-014-026.

Install the fuel pump. Refer to Procedure

005-016-026.

NOTE: The fuel pump, air compressor, and accessory drive can be installed as an assembly.

Install the push rods. Refer to Procedure

004-014-026.

Install the rocker lever assemblies. Refer to Procedure

003-009-026.

Adjust the valves and injectors. Refer to Procedure

003-004-029.

Install and adjust the C-Brake, if applicable. Refer to Procedures

020-001-026 and

020-001-029, respectively.

Install the rocker lever covers with the original reusable gaskets if they are

not
damaged. Refer to Procedure

003-011-026.

Operate the engine, and check for leaks and engine operation.