Installing New Seals

1. Seal and guide must be cleaned in the cementing area to remove all grease, oil and dirt. Use acetone or other suitable cleaning solutions.

Figure 4:

2. Spray or brush a coat of hardener on the valve guide contact surface of the seal (see Figure 4). Use protective gloves. Drying time of the hardener is approximately 5 minutes. Seals coated with hardener must be installed within ten minutes.


3. Push a protection sleeve, Part Number 000 043 084 00, on the valve stem. Oil the valve stem seal sealing lip lightly and push the seal onto the protection sleeve.

Figure 5:

4. Apply a coat of cement on the seal contact surface of the valve guide using a small brush. Immediately press the valve stem seal carefully on the valve guide with tool 10-204 (Figure 5).


5. Do not start engine for at least 12 hours after valve stem seal installation.

Caution: Part numbers given in this bulletin are for reference only. Always check with your Parts Department for the latest parts information.

Repair Procedure: 944S (4 valve engines)

Refer to the workshop manual Volume 1-A, pages 15-118 through 15-122 for valve stem seal replacement.