Which of the following tools should be used to check a cylinder head for warpage?

The correct choice involves using a straightedge and thickness gauges to check a cylinder head for warpage. A straightedge is a reliable tool that provides a reference line to assess the flatness of the surface of the cylinder head. When placed across the cylinder head, any deviations or warps can be easily identified as gaps between the straightedge and the surface.

To determine the actual measurements of any warpage, thickness gauges can be inserted into any gaps found. This combination allows for precise measurement and ensures that the cylinder head is within the manufacturer’s specifications for flatness. Maintaining this flatness is crucial for proper sealing and optimal engine performance.

Using a master bar, while it can be useful in certain contexts, lacks the specific precision of measuring warpage directly. A dial indicator can measure more precise movements over a distance but is not typically employed solely for checking warpage on a flat surface like a cylinder head. Similarly, a laser tool, although useful for alignment in various applications, does not provide the direct and tangible readings of warpage that straightedge and thickness gauges do in this scenario.