Valve Spring: Service and Repair

Valve Springs





Special Tool(s)

Removal
1. Remove the LH and the RH valve covers.
2. Rotate the crankshaft until the piston for the valve being worked on is at the top of its stroke with both the intake valve and the exhaust valve closed.
3. Hold the valve in the cylinder head.
^ Remove the spark plug.
^ Apply a minimum of 965 kPa (140 psi) of compressed air into the cylinder.





4. CAUTION: If the components are to be reinstalled, they must be installed in the same position. Mark the components for location.

NOTE: If a valve drops into the cylinder, remove the cylinder head.

Remove the rocker arms.
1. Remove the bolts.
2. Remove the rocker arms.





5. Using the special tool, compress the valve springs.





6. Remove the valve spring assembly.
1. Remove the valve spring retainer key.
2. Remove the valve spring retainer.
3. Remove the valve spring.
4. Remove and discard the valve stem seal and spring seat assembly.
7. Inspect the components.

Installation





1. NOTE: Lubricate the parts with clean engine oil.

To install, reverse the removal procedure. Tighten the rocker arm bolts in two stages.
^ Stage 1: Tighten to 5 Nm (44 inch lbs.).
^ Stage 2: Tighten to 35 Nm (26 ft. lbs.).