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1.5L REVOTORQ BS VI ENGINE
154
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)