Removal and Installation
REMOVAL
1. With cylinder head removed, compress valve springs using Special Tool C-3422-B with Adapter 6526.
2. Remove valve retaining locks, valve spring retainers, valve stem seals and valve springs.
3. Before removing valves, remove any burrs from valve stem lock grooves to prevent damage to the valve guides. Identify valves to insure installation in original location.
INSTALLATION
1. Coat valve stems with clean engine oil and insert in cylinder head.
Fig. 68
2. Install new valve stem seals on all valves using a valve stem seal tool (Fig. 68). The valve stem seals should be pushed firmly and squarely over valve guide.
CAUTION: If oversize valves are used, there is only one oversize valve available. The same stem seal is used on both the standard and oversize valve.
3. Install valve springs and retainers. Compress valve springs only enough to install locks, taking care not to misalignment the direction of compression. Nicked valve stems may result from misalignment of the valve spring compressor.
CAUTION: When depressing the valve spring retainers with valve spring compressor the locks can become dislocated. Check to make sure both locks are in their correct location after removing tool.
4. Check the valve spring installed height after refacing the valve and seat (measurement B).
Make sure measurements are taken from top of spring seat to the bottom surface of spring retainer. If height is greater than 40.18 mm (1.58 inch), install a 0.762 mm (0.030 inch) spacer under the valve spring seat to bring spring height back within specification.
5. Install rocker arm shafts.
6. Checking dry lash. Dry lash is the amount of clearance that exists between the base circle of an installed cam and the rocker arm roller when the adjuster is drained of oil and completely collapsed. Specified dry lash is 1.17 mm (0.046 inch) for intake and 1.28 mm (0.050 inch) for exhaust. After performing dry lash check, refill adjuster with oil and allow 10 minutes for adjuster(s) to bleed down before rotating cam.