1. Valve Tappet Removal
In some cases, the valve tappets may be removed first, and in other cases, the camshaft must be removed first. This depends on the design of the tappets. Try to lift the tappets out of their holes with your fingers. DO NOT use force. Once removed, lay the tappets on your workbench in the same order in which they are to be installed in the cylinder block. Make sure they are reinstalled in that same order during reassembly.
Removing the camshaft.
2. Camshaft Removal
If the engine you are working on contains valve tappets that require the camshaft to be removed first, turn the engine upside down so that the tappets fall away from the camshaft. Attempting to remove the camshaft with the tappets resting on it will result in damage to both the camshaft and the tappets. You may remove the camshaft by removing the thrust plate retaining cap screws and pulling camshaft forward carefully out of the engine block. If you were unable to remove the tappets before removing the camshaft, they may be removed at this time from the bottom of the cylinder block. With the camshaft and tappets removed, you are
now ready to begin restoring the engine to a like-new condition.
UNIT SUMMARY
The disassembly of the engine and its components was covered in this study unit. If you had difficulty with this study unit for any reason, it would be advisable for you to go back over it again. Remember, proper disassembly is the first step in rebuilding a dependable engine. This includes testing components such as the oil pump and timing gears for backlash, the crankshaft for end play, and the connecting rods for side play just before their removal. With that said, let's move to Study Unit 5 and begin troubleshooting and repairing the engine.
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