NEXON

1.5L REVOTORQ ENGINE

160

PISTON AND PISTON RINGS

1. Remove piston rings from piston using ring

expander.

2. Remove carbon deposits from piston.

3. Clean piston and piston rings thoroughly.

4. In case cylinder bore taper and ovality is within

specified limit, then same piston and piston

rings may be reused.

5. Examine pistons for cracks, scoring, other

damages, like Ring groove wear, piston pin

bore wear, spring clip groove wear/ damage

etc.

6. In case any one of the piston has any defect,

all the piston set should be replaced.

7. Examine piston rings for scoring, lateral

clearance in piston ring groove and butt

clearance in cylinder

bore.

8. Butt clearance of piston ring should be

measured in unworn portion of cylinder bore

9. In case of any piston ring with any one of this

defect, complete ring set should be replaced.

10.When cylinder bores are re-bored or honed,

pistons and rings of appropriate size should be

used. Piston size grade is stamped on piston

crown.

11.Install piston rings in their respective position

on piston using ring expander.

12.Stagger piston rings gaps such that they are

120°apart (with butt gap not in line with piston

pin)