Measuring Cylinder Bore Out-of-Round
WARNING: This page is about a different variant/trim than selected.
- Measure both the thrust and non-thrust cylinder diameter at 13 mm (0.510 in) below the deck surface (1). Record your measurements.
- Calculate the difference between the 2 measurements. The result will indicate out-of-round at the upper end of the cylinder.
- Measure both the thrust and non-thrust cylinder diameter at 100 mm (3.938 in) below the deck surface (2). Record your measurements.
- Calculate the difference between the 2 measurements. The result will indicate out-of-round at the lower end of the cylinder.
- Compare your results with the Engine Mechanical Specifications (LAF, LEA, or LUK) . If the cylinders exceed these specifications, replace the engine block.