Kia Cerato 2009 Service Manual page 92

3. Calculate the difference between the cylinder bore inner diameter and the piston outer diameter.
Piston-to-cylinder clearance :
0.06 ~ 0.08mm (0.0024 ~ 0.0031in)
4. Inspect the piston ring side clearance.
Using a feeler gauge, measure the clearance between new piston ring and the wall of ring groove.
Piston ring side clearance
No.1 : 0.09 ~ 0.13mm (0.0035 ~ 0.0051in)
No.2 : 0.08 ~ 0.12mm (0.0031 ~ 0.0047in)
Oil ring : 0.03 ~ 0.07mm (0.0012 ~ 0.0028in)
If the clearance is greater than maximum, replace the piston.
5. Inspect the piston ring end gap.
To measure the piston ring end gap, insert a piston ring into the cylinder bore. Position the ring at right
angles to the cylinder wall by gently pressing it down with a piston. Measure the gap with a feeler gauge. If
the gap exceeds the service limit, replace the piston rings. If the gap is too large, recheck the cylinder bore
inner diameter. If the bore is over the service limit, the cylinder block must be rebored.
Piston ring end gap
No.1 : 0.20 ~ 0.35mm (0.0079 ~ 0.0138in)