>> A << Valve Spring Seat/Valve Stem Seal Installation

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

The valve stem seal must not be reused.
Do not damage the tappet wall during assembly.
Be sure to use a special tool to install the valve stem seal. Poor installation causes oil loss via valve guides.
If oil is not applied, the valve stem seal may rise to the surface after it is press fitted.

Apply a small amount of engine oil to the press-fit part and lip part of the new valve stem seal.
Use a special tool to install the valve stem seal, obeying the following procedures.
Special tool valve stem seal installer adjustable (MB992922) is composed of the components shown in the illustration.
1. Chuck
2. Sleeve
3. Rock nut (small)
4. Outer pipe
5. Rock nut (large)
6. Guide pin (5.9)
7. Guide pin (4.9)
8. Cap
9. Guide pin (5.4)
  
  Fig 1: Identifying Valve Stem Seal Components
Adjust the inside chuck diameter, obeying the following procedures.
1. Install the sleeve to the chuck as shown in the illustration.
2. Install the shoulder of the valve stem seal to the chuck, aligning with the outer circumference line of the chuck as shown in the illustration.
3. Turn the sleeve to wring the chuck.
4. Stop the sleeve at the position where you can easily remove the valve stem seal by hand.
5. Use the (small) rock nut to fix the sleeve.
  
  Fig 2: Identifying Inside Chuck Components
Adjust the stem seal insertion length, obeying the following procedures.

Fig 3: Identifying Valve Stem Seal Insertion Dimension (1 Of 2)

Fig 4: Identifying Valve Stem Seal Insertion Dimension (2 Of 2)

Fig 5: Identifying Outer Circumference Line Of Chuck
1. The position, in which the end face of the outer pipe is aligned with the outer circumference line of the chuck, is 0 mm of the insertion length. Insert the chuck and the sleeve into the outer pipe to fit the nut as shown in the illustration.
2. Turn the chuck to adjust the valve stem seal insertion length.
  NOTE: The insertion length can change by 1 mm (0.04 inch) per the chuck turn.
  
  To easily know how many times the chuck is turned, put the mark at the position shown in the illustration.
3. Use a vernier caliper to measure the checkpoint (L1) of the insertion length shown in the illustration. Check the insertion length.
  - Inlet side: 16.8 mm (0.66 inch)
  - Exhaust side: 21.4 mm (0.84 inch)
4. Use the (large) rock nut to fix the sleeve.
  
  Fig 6: Identifying Valve Stem Seal Insertion Length Checkpoint
Install the cap to the chuck.
Apply the engine oil to the valve stem seal to set the chuck.
Install the valve spring seat.

Fig 7: Identifying Chuck And Cap
Use the plastic hammer to insert the valve stem seal.

Fig 8: Identifying Valve Stem Seal Installation Dimension