Cylinder Head
WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
- Visually inspect to make sure that there are no cracks, scratches or other damage.
- Use liquid penetrant tester on the important sections to check for fissures.
- Check that there are no marks of gas leaking or water leaking on gasket attachment surface.
- Check the warping of the cylinder head mating surface that mates with cylinder block using a straight edge (A) and thickness gauge (B) at the locations shown in the figure. If it exceeds the limit, correct the surface by grinding it with a surface grinder or replace the cylinder head.NOTE: Measurement should be performed at a temperature of 20°C (68°F).
Warping limit:
0.035 mm (0.0014 in)
Grinding limit:
0.1 mm (0.004 in)
Standard height of cylinder head:
98.5 mm (3.878 in)
NOTE: If the cylinder head bolt tightening torques and angle tightening is uneven, warpage of the cylinder head may occur. During installation work, make sure that tightening torque and angle tightening work is performed precisely so that it is tightened evenly.