1996 ACURA RL KA9 Service Repair Manual

*1: RIKE N manufacture d pisto n ring .
*2 : TEIKOK U PISTO N RIN G manufacture d pisto n ring .
PISTO N RIN G
END GA P
15 - 2 0 m m(0.6-0. 8 in )
Pisto n Ring s
End Ga p
1. Usin g a piston , pus h a ne w rin g int o th e cylinde r
bore 15-2 0 m m (0. 6 - 0. 8 in ) fro m th e bottom .
2 . Measur e th e pisto n rin g end-ga p wit h a feele r
gauge :
• I f th e ga p is to o small , chec k t o se e if yo u hav e th e
prope r ring s fo r you r engine .
• I f th e ga p i s to o large , rechec k th e cylinde r bor e
diamete r agains t th e wea r limit s o n pag e 7-15 .
I f th e bor e i s ove r th e servic e limit , th e cylinde r
bloc k mus t b e rebored .
Pisto n Rin g End-Gap :
To p Rin g
Standar d (New) : 0.2 5 - 0.4 0 m m
(0.01 0 - 0.01 6 in )
Servic e Limit : 0.7 0 m m (0.02 8 in )
Secon d Rin g
Standar d (New) : 0.4 0 - 0.5 5 m m
(0.01 6 - 0.02 2 in )
Servic e Limit : 0.8 5 m m (0.03 3 in )
Oi l Rin g
Standar d (New) : 0.2 0 - 0.7 0 m m
(0.00 8 - 0.02 8 in ) * 1
0.2 0 - 0.5 0 mm
(0.00 8 - 0.02 0 in ) * 2
Servic e Limit : 0.8 0 m m (0.03 1 in )
Replacemen t
1. Usin g a rin g expander , remov e th e ol d pisto n rings .
2 . Clea n al l th e rin g groove s thoroughly .
NOTE:
• Us e a squared-of f broke n rin g o r rin g groov e
cleane r wit h a blad e t o fi t th e pisto n grooves . Fil e
dow n th e blad e i f necessary .
• To p rin g groov e i s 1. 5 m m (0.0 6 in ) wide , th e
secon d rin g groov e i s 1. 2 m m (0.0 5 in ) wide , an d
th e oi l rin g groov e is 2. 8 m m (0.1 1 in ) wide .
CAUTION : D o no t us e a wir e brus h to clea n th e rin g
grooves , o r cu t rin g groove s deepe r wit h th e clean -
in g tool .
NOTE : I f th e pisto n i s t o b e separate d fro m th e con -
nectin g rod , d o no t instal l ne w ring s yet .
3 . Instal l ne w ring s i n th e prope r sequenc e an d posi -
tio n (se e page s 7-21 , 7-22 ).
NOTE : D o no t reus e ol d pisto n rings .
PISTO N RIN G
RING EXPANDE R(Commerciall y available )
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Ring-to-Groove Clearance

After installing a new set of rings, measure the ring-to-

groove clearance:

Top Ring Clearance

Standard (New): 0.055 - 0.080 mm

(0.0022 - 0.0031 in)

Service Limit: 0.13 mm (0.005 in)

Second Ring Clearance

Standard (New): 0.030 - 0.055 mm

(0.0012 - 0.0022 in)

Service Limit: 0.13 mm (0.005 in)

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Alignment

1. Install the rings as shown.

TOP RING (Chrome)

SECOND RING (Dark)

Piston Ring Dimensions:

Top Ring (Standard)

A: 3.3 mm
(0.13
in)

B: 1.5 mm
(0.06
in)

Second Ring (Standard)

A: 3.5 mm
(0.14
in)

B: 1.2 mm
(0.05
in)

NOTE: The manufacturing marks must be facing

upward.

OIL RING
MARK

- SPACER
TOP RING

SECOND RING
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