Valve Guide Seal: Service and Repair

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VALVE SEALS REMOVAL/INSTALLATION - HYBRID

Removal

CAUTION: During engine repair procedures, cleanliness is extremely important. Any foreign material (including any material created while cleaning gasket surfaces) that enters the oil passages, coolant passages or the oil pan may cause engine failure.

1. With the vehicle in NEUTRAL, position it on a hoist. See Lifting.

2. Remove the camshafts. See - Service and Repair.

3. Remove and inspect the valve tappets. See - Service and Repair and - Testing and Inspection.


NOTE: If the camshafts and valve tappets are to be reused, mark the location of the valve tappets to make sure they are assembled in their original positions.

NOTE: The number on the valve tappets only reflects the digits that follow the decimal. For example, a tappet with the number 0.650 has the thickness of 3.650 mm.

4. Remove the spark plugs. - Service and Repair.

5. Connect the compressed air supply to the No. 1 cylinder.

CAUTION: Use compressed air at 7 to 10 bars (100-150 psi). Do not disconnect the compressed air from the cylinder until the valve spring, valve spring retainer and valve collet is installed. Any loss of air pressure will allow the valve to fall into the cylinder.






6. Apply compressed air to the cylinder and remove the valve spring.

- Using the special tools, compress the valve spring and remove the valve collet, using some grease and a small screwdriver.

- Remove the valve spring retainer and the valve spring.


NOTE: Place all parts in order to one side.






7. Using the special tools, remove and discard the valve seal.

Installation





1. Install the valve stem seal installation sleeve.






2. Using the special tool, install the valve seal.






3. Using the special tools, install the valve spring.

- Insert the valve spring and the valve spring retainer.
- Compress the valve spring and install the valve collet using some grease and a small screwdriver.


NOTE: Check the seating of the valve collet.

4. Disconnect the compressed air supply.

5. Install the spark plugs. See - Service and Repair.

6. Repeat the appropriate removal and installation steps for all the cylinders.

7. Coat the valve tappets with clean engine oil and insert them.

8. Install the camshafts. See - Service and Repair.