Valve clearance is the space between the valve stem and the rocker arm or camshaft lobe. It is important to check valve clearance regularly to ensure that the valves are operating properly. If the valve clearance is too tight, the valves will not open fully and this can lead to a loss of power and efficiency. If the valve clearance is too loose, the valves will not close fully and this can lead to burnt valves and other engine damage.
Checking valve clearance is a relatively simple procedure that can be done with a few basic tools. The first step is to remove the valve cover. Once the valve cover is removed, you will be able to see the valves and the rocker arms or camshaft lobes. You will need to use a feeler gauge to measure the clearance between the valve stem and the rocker arm or camshaft lobe. The feeler gauge should be the same thickness as the specified valve clearance for your engine. If the feeler gauge does not fit between the valve stem and the rocker arm or camshaft lobe, then the valve clearance is incorrect and will need to be adjusted.