Cylinder Head Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Suzuki Reno, 2008 Suzuki Forenza, 2007 Suzuki Reno, 2007 Suzuki Forenza, and 2006 Suzuki Reno. However, it is still accessible from the selected car via links, so may be relevant.

Clean the sealing surfaces.
Inspect the cylinder head gasket and mating surfaces for leaks, corrosion, and blowby.
Inspect the cylinder head for cracks.
Inspect the length and the width of the cylinder head using a feeler gauge and a straight edge.
Check the sealing surfaces for deformation and warpage. The cylinder head sealing surfaces must be flat within 0.025 mm (0.001 in.) maximum.

Fig 1: Inspecting Length And Width Of Cylinder Head For Deformation And Warpage
Courtesy of SUZUKI OF AMERICA CORP.
Measure the height of the cylinder head from sealing surface to sealing surface. The cylinder head height should be 133.975 - 134.025 mm (5.274 - 5.276 in.). If the cylinder head height is less than 133.9 mm (5.271 in.), replace the cylinder head.
Inspect all threaded holes for damage.
Inspect valve seats for excessive wear and burned spots.

Fig 2: Measuring Height Of Cylinder Head From Sealing Surface To Sealing Surface
Courtesy of SUZUKI OF AMERICA CORP.