Caution: The cylinder head must be thoroughly cleaned after using the magnetic crack detector, Part No. ST-
1166, so that all iron fragments are removed.
Use the magnetic crack detector, Part No. ST-1166, to find cracks in the areas around the valves and the injectors.
Fill the powder spray bulb one-third full of metal powder.
Put the magnetizing head on the cylinder head combustion surface as shown to check for cracks that run across
the head.
Lightly spray the metal powder onto the combustion sur- face.
Use compressed air regulated to 205 kPa [30 psi] to remove excess powder from the area. The powder will
remain if there are any cracks and will appear as a white line.
Visually inspect the cylinder head for cracks in the combustion face.
Put the magnetizing head on the combustion surface as shown to check for cracks that run lengthwise of the
cylinder head.
Repeat the procedure as outlined above.
Clean with solvent. Dry with compressed air.
