REMOVAL & INSTALLATION
- Remove the cylinder head.
- On the 2.2L engine, remove the rocker arms/shafts assemblies and the camshaft.
- Block the head on its side, or install a pair of head-holding brackets made especially for valve service.
- Use a socket slightly larger than the valve stem and keepers, place the socket over the valve stem and gently hit the socket with a plastic hammer to break loose any varnish buildup.
- Remove the valve keepers, retainer, and valve spring using a valve spring compressor (the locking C-clamp type is the easiest to use). If necessary, remove the lower spring seat (2.2L engine) or any shims that may have been under the valve spring.
- Place the parts from each valve in a separate container, numbered and identified for the valve and cylinder.
- Inspect the valve springs for damage or wear and replace as necessary. Check the free length and/or spring pressure.
- Install the valve spring retainer on the valve without the spring and retain it with the keepers. Pull the valve firmly against the seat.
- Using a suitable measuring tool (calipers, or a telescope gauge with a micrometer work well), measure the distance between the cylinder head and the retainer and compare this distance with the installed height specification. Shims are available to make up the difference and are usually necessary after a valve job.
- Install the lower spring seat (2.2L engine) or any shims that are required under the valve spring.
- Compress the spring using the spring compressor and install the keepers. Release the spring compressor.
- After all the valves and springs have been assembled, take a mallet and lightly strike each valve stem tip squarely to seat the keepers.
- On the 2.2L engine, install the camshaft and the rocker arm/shaft assemblies.
- Install the cylinder head.
- Check the springs for cracks or other damage.
- Check each spring for squareness using a steel square and a flat surface. Stand the spring and square on end on the flat surface. Slide the spring up to the square, revolve the spring slowly and observe the space between the top coil of the spring and the square. If the space exceeds 0.067 in. (1.7mm), replace the spring.
- Measure the free length of the spring. On the 2.2L engine, the intake spring should measure 1.902-1.949 in. (48.3mm-49.5mm) and the exhaust spring should measure 1.937-1.984 in. (49.2-50.4mm). On the 3.0L engine, the free length should be approximately 1.84 in. (46.7mm).
- On the 3.0L engine, check the springs for proper pressure at the specified spring lengths using a valve spring tester. The pressure should be (without the damper) 65 lbs. @ 1.58 in. (40mm) and 180 lbs. @ 1.16 in. (29.5mm).