Cylinder Head

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

Check the cylinder head for water leakages, gas leakages, damages or cracks before cleaning.
Remove oil, water deposits, sealants, carbon deposits completely. Blow air after cleaning the oil passage to check whether the oil passage is not clogged.
Check the flatness of the lower surface of the cylinder head for distortions using a straight edge gauge and thickness gauge. Unless being within the limit, the distortion must be ground and corrected.

Fig 1: Checking Flatness Of Lower Surface Of Cylinder Head For Distortions

Standard value: 0.03 mm (0.0012 inch)

Limit: 0.05 mm (0.002 inch)

Cylinder head height (specification when new): 120 mm (4.7 inches)

CAUTION: *The grinding limit must be within 0.15mm including the cylinder block.

Grinding limit: *0.15 mm (0.006 inch)