Cylinder Head Measurement
Courtesy of GENERAL MOTORS CORP.
- Inspect the cylinder head sealing surface for flatness. Use a straightedge (1).
- Measure the valve guide inner diameter. Note the measurement results. Refer to Engine Mechanical Specifications
to find the permitted values.
- Substract the valve stem diameter from valve guide inner diameter to calculate the valve stem to guide clearance. Refer to Engine Mechanical Specifications
to find the permitted values.
- Turn the cylinder head upside down.