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How to Install Conical Valve Springs

Conical valve springs return an engine cylinders valve to its neutral position after it has been moved by a cycle of the engine. The purpose of their tapered shape is to provide a progressive action. A straight spring compresses evenly, but with a conical spring, the narrower portion is more difficult to compress that the broader section. This means that the more the spring compacts, the greater the force required to compress it even further.

Instructions

1

Remove the cylinder head, rocker arms and push-rods from the side of the engine on which you plan to work first. set all the components aside, noting which bolts and fixtures go with which part.

2

Unscrew the first spark plug using the spanner. When you feel it disengage from the thread, remove the spanner and use the magnetic grabber to lift it out of the cylinder. With the tops of the springs exposed, the locking nuts compressing the spring are now visible.

3

Make sure the valve-removal tool you have is compatible with conical valve springs as well as straight ones. Apply the lever or stud-mount valve-removal tool to the top of the spring and compress it downward. Compress the spring just enough to allow you to access and remove the lock from the center of the spring. Any more risks binding the coils of the spring together.

4

Undo the locks and carefully lift them out of the spring, the magnet may be useful for this. The old springs will now lift freely out of the chamber. Place the new springs into the chamber, narrow end at the top, and replace the retainer disc over the top.

5

Compress the spring with the lever or stud-mount tool and replace the lock in the top of the retainer. Repeat with all other springs.

Posted by Unknown at 1:00 PM

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Labels: conical, how, install, springs, to, valve