Note: Service stations may sell remanufactured cylinder heads. Considering that repairing a head requires specialized tools, the store may not have the necessary spare parts. Purchasing a ready-made head may be more economical.
1. Removal of camshafts and tappets is described in chapters 2A and 2B. To completely disassemble the head, all that remains is to remove the valves and associated parts.
2. Before removing the valves, consider how to label them and store them together with the related parts. so that when installed they all take their original places (figure 9.2).
3. Compress the first valve spring with a puller and remove the crackers (figure 9.3). Carefully release the spring and remove the spring from the top and bottom (if it is provided) plates. Be careful: When using the puller, do not damage the tappet bores.
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4. Pull the valve out of the head, then remove the valve stem seal from the guide bushing. If the valve gets stuck in the guide, push it back and file the stem in the area of the cracker groove with a thin file or emery stone (figure 9.4).
5. Repeat these steps with the remaining valves. Don't forget to place all the valves and their associated parts in separate bags.
6. After removing the riveted part, you can wash and inspect the head. However, if you are planning a complete engine overhaul, postpone this operation until the block is completely disassembled.