Valve Guide Seal: Service and Repair

Valve Seals





Special Tool(s)





Material

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 can cause engine failure.

CAUTION: The crankshaft, the crankshaft sprocket and the pulley are fitted together by friction, using diamond washers between the flange faces on each part. For that reason, the crankshaft sprocket is also unfastened if you loosen the pulley. Therefore the engine must be retimed each time the damper is removed. Otherwise severe damage can occur.

1. Remove the camshafts.
^ Remove the valve tappets and place them in order to one side.

2. WARNING: Always wear protective goggles when working with compressed air. This can prevent injury. Failure to follow these instructions can result in personal injury.

Unscrew the spark plug on cylinder No. 1 and connect the compressed air supply.





3. CAUTION: Use compressed air at 7 to 10 bars (100-150 psi).

NOTE: Place all parts in order to one side.

Using the special tools, apply compressed air to the cylinder.
^ Using the special tools, compress the valve springs and remove the valve collets using some grease and a small screwdriver.
^ Remove the valve spring retainers and the valve springs.





4. Using the special tools, remove the valve stem seals.

Installation





1. Install the valve stem seal installation sleeve.





2. Using the special tool, install the valve stem oil seals.





3. NOTE: Check the seating of the valve collets.

Using the special tools, install the valve springs.
^ Insert the valve springs and the valve spring retainers.
^ Compress the valve springs and install the valve collets using some grease and a small screwdriver.

4. NOTE: Do not tighten the spark plug at this time.

Disconnect the compressed air supply and screw in the spark plug.
5. Repeat the appropriate steps for all the other cylinders.
6. Coat the valve tappets with clean engine oil and insert them.
7. Tighten the spark plugs.
8. Install the camshafts.