What needs to be done when damaged valves are suspected?

1 minuteread

When you suspect a damaged valve:

The first step of diagnosis when damaged valves are suspected would be a leak down test. During this test, the engine is rotated until the highest dead center of the currently tested cylinder is achieved. The intake and exhaust valves are going to be closed now. Compressed gas is injected into the cylinder through the electrical device hole. The flexibility of the cylinder to carry pressure is then measured employing a leak down gauge.

If significant leakage is detected coming from either the car’s throttle body or exhaust, the valves are leaking. In some cases, the valves are inspected employing a borescope inserted into the cylinder. Removal of the valve cover to examine the valve train may additionally be required. If all else fails, the plate might have to be removed to test the valves.

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