493 HONDA CIVIC 1998 6.G Workshop Manual

Unit of iength: mm (!n)
930 (9.5, 135)20012.0,zal
0.05 - 0.15 (0.002 - 0.006)
0.050 - 0.089 (0.002 - 0.004)
0.0310.001)max.33.088 (1.3027i
36.261 {1.4278)34.978 (1.3771)
32.785 {1.2907)35.720 (1.4063)
34.691 (1.3658)
u*u lo.r,ool5.420 (0.2134)
0.08 (0.003)
0.11 (0.004)
2.0 (0.08)
2.0 (0.08)
38.185 (1.5033)
37.885 (1.4915)
250 rpm (min riand Nominal
wide open throttle Minimum
kPa (kqf/cm', psi) Maximum variation
End play
Camshaft-to holder oil clea€nce
Total runoutCam lobe height lN PrimaryMidSecondaryEX PrimaryMidSecondary
0.15 - 0.19 (0.006 - 0.007)*
0.17 - 0.21 (0.007 - 0.008)*
5.475 - 5.485 10.2156 - 0.2159)
5.450 - 5.460 (0.2146 - 0.2150)
0.025 - 0.055 (0.0010 0.0022)
0.050-0.080 (0.0020 - 0.0031)
Valve clearance
Valve stem O.D.
Stem-to-guide clearance
INEXINEXINEX
1.25 - 1.55 {0.049 - 0.061)r.25 - 1.55 (0.049 - 0.061)
37.465 - 37.935 (1.4750 - 1.4935)
37.165 - 37.635 (1.4632 - 1.4817)
INEXINEX
width
Stem installed height
40.92 (1.611)*'
40.91 (1.6111"
36.71 (1.415)
41.96 (1.652)*r
4 r.94 (1.651)*'
free t*gth lN OUTER
5.51 - 5.53 (0.217 - 0.218)5.51 - 5.53 (0.217 - 0.218i12.55 - 13.05 (0.494 0.5'j4)
12.55 - 13.05 (0.494 - 0.514)
LD. lNEX
Installed height lNEX
0.025 - 0.052 (0.0010 0.0020)
o.o2s - 0.052 {0.0010 0.0020)
Cylinder Head/Valve Train(816A2 engine) - Section
MEASUREMENTSTANDARD INEW)SERVICE LIMIT
*: Measuring point between camshaft and rocker arm'*1: NTHON H;TSUJO manufactured vatve spring. *2: CHUO HATSUJO manutactured valve spnng.
3-3

Unit of length: mm (in)
Transmission oil
43.009 43.025 (1.6933 - 1.6939)
0.06 0.21 (0.002 - 0.008)
31.42 - 31.41 \1.231 1.2391
t.D.End play
Thickness
Diameter of ball bearing contact area A
Diameter of lst gear contact area I
Diameter of needle bearing contact area C
Runout
LD.End play {When tightened by the specified torque)
Thickness
LD.o.D.Length
Spacer collar(CoLrntershaft 2ndgear)
Spacer collar(Mainshaft 4thand 5th gear)
LD.o.D.Lengtn
Manual TransmissionS4C - Section 13
M€ASUREMENT
MainshaftFnd plaVDiameter of ball bearing contact area C(Clutch housing side)Diameter of 3rd gear contact area B
Diameter of ball bearing contact area 'q(Transmission housing side)
Runout
Capacity | (US qt, lmp qt)
LD.End play
Thickness
2.3 (2.4,2.0) for overhaul2.2 (2.3, 1.9)for oil change
0.11 - 0.18 (0.004 - 0.007)21 .917 - 21 .990 11.1015 - 1 .10201
37.984 38.000 (1.4954 1.4960)
27.987 - 28.000 (1.1018 1.1024)
STANDARD {NEW)
0.02 (0.001)max.
SERVICE LIMIT
Adtust27.930 (1.0996)
37 930 (1.4933)
27.940 (1.1000)
0.05 (0.002)
Mainshaft 3rd and4th gears
43.009 - 43.025 (1.6933 1.6939)
0.06 - 0.21 (0.002 0.008)
34.92 - 34.91 \1.315 1.311)
31.42 - 31.41 (1.237 1.239)
24.980 24.993 (0.9835 0.9840)
36.984 37.000 (1.4561 - 1.4567)
33.000 - 33.015 (1.2992 - 1.2998)
0.02 (0.0008) max.
3rd4th
43.08 (1.696)
0.3 (0.01)
34.3 ('t.350)
31.3 11.232)
43.08 (1.696)
0.3 (0.01)
31.311.232)
24.940 (0.9818)
36.930 (1.4539)
32.950 (1.2970)
0.05 (0.002)
41.07 (1.617)
0.25 (0.01)41.009 - 41.025 (1.6145 - 1.6152)
0.045 - 0.205 (0.0018 0.0081)
44.009 44.025 {1.7326 - 1.7333)
0.07 0.14 (0.003 - 0.006)28.92 - 28.97 (1.1386 -'j.1405)
36.521 - 36.531 (1.4378 1.4382)
41.989- 42.000 (1.6531 - 1.6535)
29.07 - 29.09 11.1444 - 1.1453)
44.07 (1.735)
0.24 (0.009)
28.8 (1.134)
36.54 (1.439)
41.93 (1.651)
31 .0O2 - 31 .012 11 .2205 - 1 .2209'l
36.989 - 37.000 {1.4563 - 1.4570)
56.45 - 56.55 1'2.2224 - 2.2264126.03 - 26.0A 11 .025 - 1 .021 |
31.06 (1.223)
36.94 (1.454)
(cont'd)
3-9

Valve Seats
Reconditioning
1. Renew the valve seats in the cylinder
valve seat cutter.
NOTE: lf any guides are worn (see
replace them (see page 6-80) before
valve seats,
head with a
page 6-79),
cutting the
Carefully cut a 45o seat, removing only enough mate-
rial to ensure a smooth and concentric seat.
Bevel the upper edge of the seat with the 30" cutterand the lower edge of the seat with the 60. cutter.Check width of seat and adjust accordingly,
Make one more very light pass with the 45" cutter toremove any possible burrs caused bv the other cut-
ters.
Valve Seat Width:
Standard (Newl: 1.25 - 1.55 mm {0.0't9 - 0.061 in)Service Limii: 2.0 mm 10,08 inl
Sear Widrh
6-78
5. After resufacing the seat. inspect for even valveseating: Apply Prussian Blue Compound to thevalve face, and insert the valve in its original loca-tion in the head. then lift it and snap it closedagainst the seat several times.
PRUSSIAN BLUE COMPOUND
The actual valve seating surface, as shown by theblue compound, should be centered on the seat.. lf it is too high (closer to the valve stem), you mustmake a second cut with the 60. cutter to move itdown, then one more cut with the 45. cutter torestore seat width.
. lf it is too low (closer to the valve edge), you must
make a second cut with the 30. cutter to move itup. then one more cut with the 45. cutter to restoreseat width.
NOTE: The final cut should always be made withthe 45" cutter,
7. Insen the intake and exhaust valves in the head and
measure valve stem installed heioht.
Intaka Valve Stem Installed Height:
Standsrd lNaw): 37.465 - 37.935 mm(1./P50 - r.4935 inl
Sorvice Limit: 38.185 mm 0.5033 in)
Exhau3t Valv€ Stem Installed Height:
Standard (New): 37.165 - 37.6i|5 mm(1.46:t2 - 1.i1817 inl
Servico Limit 37.885 (1.4915 inl
lf valve stem installed height is over the service limit,replace the valve and recheck. lf it is still over the ser-vice limit, replace the cylinder head; the valve seat inthe h6ad is too deep.
(