Service function guideCylinder Head Inspection

This guide delivers a complete, professional procedure for inspecting a cylinder head for cracks, warping, and valve wear, written for working mechanics and experienced DIYers who already have the head removed from the engine. It explains how the head, valves, and cooling passages function together, then walks through cleaning, crack detection, flatness measurement, valve and seat assessment, and guide wear checks with the measurements and visual cues you should expect at each stage. You will learn how to set up a clean inspection area, use straightedges and feeler gauges correctly, interpret dye penetrant and pressure test results, and decide whether a head can be resurfaced, rebuilt, or must be replaced. By the end you will be able to perform a repeatable inspection, document your findings, and hand off or complete the job with confidence across common passenger vehicle layouts.