Cylinder Head Off

CYLINDER HEAD OFF

1. Coat valve stems with clean engine oil and insert in cylinder head.
2. Install new valve stem seals on all valves using a valve stem seal tool (Figure 1). The valve stem seals should be pushed firmly and squarely over valve guide.

CAUTION: When oversize valves are used, the corresponding oversize valve seal must also be used. Excessive guide wear may result if oversize seals are not used with oversize valves.




Figure 1 Valve Stem Oil Seal Tool






3. Install valve springs and retainers. Compress valve springs only enough to install locks, taking care not to mis-align 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. Ensure both locks are in the correct location after removing tool.

4. Check the valve spring installed height B after refacing the valve and seat (Figure 2). Make sure measurements are taken from top of spring seat to the bottom surface of spring retainer. If height is greater than 38.75 mm (1.525 in.), install a 0.762 mm (0.030 in.) spacer under the valve spring seat to bring spring height back within specification.




Figure 2 Checking Spring Installed Height and Valve Tip Height Dimensions