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Valve spring installed height is usually adjusted by:

a. Installing valve spring inserts (shims).
b. Adjusting the rocker arm.
c. Changing the camshaft.
d. Replacing the valve springs.

Answer :

Final answer:

Valve spring installed height is usually adjusted by installing valve spring inserts (shims), which is essential for correct valve operation and engine performance.

Explanation:

The valve spring installed height is usually adjusted by:

a. Installing valve spring inserts (shims).
b. Adjusting the rocker arm.
c. Changing the camshaft.
d. Replacing the valve springs.

The correct answer to this question is a. Installing valve spring inserts (shims). Valve spring shims are used to adjust the installed height of a valve spring to ensure it meets specifications. The installed height is the distance between the bottom of the spring and the point where it sits on the cylinder head when the valve is closed. Proper adjustment is essential for maintaining correct spring tension, which affects engine performance and valve operation. Adjusting the rocker arm, changing the camshaft, or replacing the valve springs are not typically methods used to adjust installed height; these actions serve other purposes in maintaining and tuning an engine.

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