AG Mechanics CDE Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

On L-head engines, if the valve tappet clearance is too small, the proper clearance is obtained by:

adjusting the pushrod

If the valve tappet clearance is too small on an L-head engine, adjusting the pushrod is the proper way to obtain the correct clearance. The other options are incorrect because grinding on the end of the valve stem will not always result in the correct clearance and could also damage the valve and seat, increasing the camshaft lift may alter the engine's performance and requires replacement of the camshaft, and refacing the valve would be a time-consuming and unnecessary approach. Adjusting the pushrod is the most efficient and precise method for obtaining the correct valve tappet clearance on an L-head engine.

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grinding on the end of the valve stem

increasing the camshaft lift

refacing the valve

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