Service manual

Page 44 of 151

• Remove the valve stem seals.

• Clean any carbon deposits in the combustion

chamber.

• Clean residue and foreign materials from the cylinder

head matching surface. Do not damage the surface

of the cylinder head.

6-5 Cylinder Head Inspection

• Check if the spark plug or valve holes are cracked.

Replace if necessary.

• Measure cylinder head warping with a straightedge

and thickness gauge.

Service limit: 0.5 mm

Camshaft

Inspect the cam lobe height for damage.

Service Limit:

IN: Replace if less than 34.45mm.

EX: Replace if less than 34.30mm.

• Inspect the camshaft bearing for looseness or

wear. If any damage, replace the camshaft and

bearing.