Distortion of Gasket Surface
WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
Use straightedge and feeler gauge to check gasket surface for distortion and repair it, if flatness exceeds the limit.
Replace cylinder block if repair is not possible.
Cylinder block flatness
Limit: 0.03 mm (0.001 in.)