Table of contents: Disassembly ↓ Assembly ↓
Disassembly
1. Remove the cylinder head (see subsection 3.1.1.11).
2. Remove the intake and exhaust manifolds if these parts have not already been removed.
3. Remove the valve levers and adjusting washers.
4. Compress the first valve spring with a tool and remove the crackers. Carefully release the valve spring, remove the spring plate, spring and support washer. Remove the valve stem seals from the guide bushings.
5. To remove the plate, lightly tap the fixture with a soft-faced hammer.
6. Remove the valve from the combustion chamber side.
7. The valve should be stored together with the crackers, spring, spring plate and support washer. Note that the N1 valve is located near the front cover.
Assembly
1. Install the spring support washer, dip the valve stem seal in fresh engine oil and place it on the valve stem and sleeve.
2. Lubricate the valve stems with fresh engine oil and install the valves into their respective guides on the cylinder head in the same order as the original installation. New valves should be installed in the seats they were lapped into.
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3. Place the spring on the support washer, orienting it so that the tightly wound spring coils are facing downwards.
4. Install the spring plate.
5. Compress the springs with the tool and insert the crackers into the groove on the valve stem.
Caution: To hold the crackers in the valve grooves when removing the tool, lubricate the crackers with grease.
6. After installing all the valves, turn the cylinder head over and seat the valve train parts with light hammer blows through a wooden spacer on the valve stems.