AG Mechanics CDE Practice Exam 2025 – The Comprehensive All-in-One Guide for Success

Question: 1 / 400

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

grinding on the end of the valve stem

If the valve tappet clearance is too big, it means that there is too much space between the valve and the tappet. This is caused by wear and tear over time. Options B and C would not fix this issue as they do not directly address the clearance. Option D involves extensive repairs and would not be necessary for simply fixing the clearance issue. Grinding down the end of the valve stem allows for a smaller gap between the valve and tappet, thus adjusting the clearance to the proper size.

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increasing the camshaft lift

precutting the seat

refacing the valve, precutting the seat, lapping the valve

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