Valve Spring: Service and Repair

Valve Springs





Special Tool(s)

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 valve tappets.





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.

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.

Installation





1. NOTE: Check that there is no dirt or particles within the valve stem grooves. 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.
^ Disconnect and remove the air supply.
2. Install the valve tappets.