Acura 2002 RSX Service Manual page 154

Valve Inspection
1 . Remove the valves (see Page 6-36).
Measure the valve in these areas.
K20A3 engine:
lntake Valve Dimensions
A Standard {New): 34.85 35.15 mm
( 1 . 3 7 2 1 . 3 8 4 i n . )
B Standard (Newl: 108.7 109.5 mm
14.280 4.311 in.)
C Standard {New): 5.475 5.,185 mm
10.2156 0.2159 in.)
C Service Limit:
5.445 mm {0.214 in.)
Exhaust Valve Dimensions
A Standard (New): 29.85 30.15mm
( 1 . 1 7 5 r . 1 8 7 i n . )
B Standard (New): 108.3 - 109.1 mm
(4.264 4.295 in.l
C Standard (New): 5.450 5.460 mm
(0.2146 0.2150 in.)
C Service Limit:
5.42 mm {0.213 in.)
K20A2 engine:
lntake Valve Dimensions
A Standard (New):34.85 35.15 mm
( 1 . 3 7 2 1 . 3 8 4 i n . l
B Standard lNew): 108.8 109.4 mm
14'283 4.307 in.)
C Standard (New): 5.475' 5.485 mm
(0.2156 0.2159 in.l
C Service Limit:
5.445 mm (0.214 in.)
Exhaust Valve Dimensions
A Standard lNewl: 29.85 30.15 mm
B Standard (New):
C Standard (Newl:
C Service Limit:
( 1 . 1 7 5 1 . r 8 7 i n . )
108.4 109.0 mm
(4.268 4.291 in.)
5.450 5.400 mm
(0-2146 0.2150 in.)
5.42 mm (0.213 in.)
Valve Stem-to-Guide Glearance
Inspection
1 . Remove the valves (see page 6-36).
2. Slide the valve out of its guide about 10 mm, then
measure the guide-to-stem clearance with a dial
indicator whlle rocking the stem in the direction of
normal thrust (wobble method).
. lf the measurement exceeds the service limit,
recheck-it using a new valve.
. lf the measurement is now within the service
limit, reassemble using a new valve.
. lf the measurement with a new valve still
exceeds the service iimit, go to step 3.
lntake Valve Stem-to-Guide Clearance:
Standard {New}: 0.06 - 0.11 mm
10.002 0.004 in.)
Service Limit:
0.16 mm {0.006 in.)
Exhaust Valve Stem-to-Guide Clearance:
Standard (New): 0.11 0.16 mm
(0.004 0.006 in )
Seryice Limit:
0.22 mm (0.009 in.)
Subtract the O.D. ot the valve stem. measured with
a micrometer, from the l.D. of the valve guide,
measured with an inside micrometer or ball gauge
Take the measurements in three places along the
valve stem and three places inside the valve guide.
The difference between the largest guide
measurement and the smallest stem measuremenl
should not exceed the service limit
lntake Valve Stem-to-Guide Clearance:
Siandard (New): 0.030- 0'055 mm
{0.0012 - 0.0022 in.)
Service Limit:
0.08 mm (0.003 in.)
Exhaust valve Stem-to-Guide Clearance:
Standard {New): 0.055-0.080 mn
10.0022 0.0031 in.)
Service Limit:
0.11 mm {0'004 in.)
6-37