Honda Odyssey 2004. Manual — part 52
−
−
−
−
−
−
−
−
*01
S0X4A00A14680263001MAAT00
Intake Valve Stem-to-Guide Clearance
Standard (New):
0.04
0.09 mm
(0.002
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.)
Service Limit:
0.24 mm (0.009 in.)
Intake Valve Stem-to-Guide Clearance
Standard (New):
0.020
0.045 mm
(0.0008
0.0018 in.)
Service Limit:
0.08 mm (0.003 in.)
Exhaust Valve Stem-to-Guide Clearance
Standard (New):
0.055
0.080 mm
(0.0022
0.0031 in.)
Service Limit:
0.12 mm (0.005 in.)
6-48
Cylinder Head
Valve Stem-to-Guide Clearance Inspection
1. Remove the valves (see page 6-46).
2. Slide the valve out of its guide about 10 mm
(0.39 in.), then measure the guide-to-stem
clearance with a dial indicator while rocking the
stem in the direction of normal thrust (wobble
method).
• If the measurement exceeds the service limit,
recheck it using a new valve.
• If the measurement is now within the service
limit, reassemble using a new valve.
• If the measurement with a new valve still
exceeds the service limit, go to step 3.
3. Subtract the O.D. of the valve stem, measured with
a micrometer, from the I.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 measurement
should not exceed the service limit.
03/07/29 09:11:51 61S0X050_060_0048
*01
*02
*03
S0X4A00A14680263001KBAT00
Special Tools Required
6-49
Valve Guide Replacement
87 mm
(3.43 in.)
57 mm
(2.24 in.)
10.8 mm
(0.42 in.)
5.3 mm
(0.21 in.)
A
• Valve guide driver, 5.5 mm 07742-0010100
• Valve guide reamer, 5.5 mm 07HAH-PJ7A100
1. Inspect valve stem-to-guide clearance (see page 6-
48).
2. As illustrated, use a commercially available air-
impact valve guide driver (A) modified to fit the
diameter of the valve guides. In most cases, the
same procedure can be done using the special tool
and a conventional hammer.
3. Select the proper replacement guides and chill
them in the freezer section of a refrigerator for
about an hour.
4. Use a hot plate or oven to evenly heat the cylinder
head to 300°F (150°C). Monitor the temperature
with a cooking thermometer. Do not get the head
hotter than 300°F (150°C); excessive heat may
loosen the valve seats.
5. Working from the camshaft side, use the driver and
an air hammer to drive the guide about 2 mm
(0.1 in.) towards the combustion chamber. This will
knock off some of the carbon and make removal
easier. Hold the air hammer directly in line with the
valve guide to prevent damaging the driver. Wear
safety goggles or a face shield.
6. Turn the head over and drive the guide out toward
the camshaft side of the head.
7. If a valve guide won’t move, drill it out with a 8 mm
(5/16 in.) bit, then try again. Drill out the guides only
in extreme cases; you could damage the cylinder
head if the guide breaks.
8. Remove the new guide(s) from the freezer, one at a
time, as you need them.
(cont’d)
03/07/29 09:11:51 61S0X050_060_0049
−
−
−
−
*04
01
Valve Guide Installed Height
Intake:
21.20
22.20 mm (0.835
0.874 in.)
Exhaust:
20.63
21.63 mm (0.812
0.852 in.)
6-50
Cylinder Head
Valve Guide Replacement (cont’d)
07742-0010100
A
B
07HAH-PJ7A100
9. Apply a thin coat of clean engine oil to the outside
of the new valve guide. Install the guide from the
camshaft side of the head; use the special tool to
drive the guide into the specified installed height
(A) of the guide (B). If you have all 12 guides to do,
you may have to reheat the head.
10. Coat both the reamer and the valve guide with
cutting oil.
11. Rotate the reamer clockwise the full length of the
valve guide bore.
12. Continue to rotate the reamer clockwise while
removing it from the bore.
13. Thoroughly wash the guide with detergent and
water to remove any cutting residue.
14. Check the clearance with a valve (see page 6-48).
Verify that the valve slides in the intake and
exhaust valve guides without exerting pressure.
Turn reamer in
clockwise direction only.
03/07/29 09:11:52 61S0X050_060_0050
−
−
01
02
03
*01
S0X4A00A14680263041LBAT00
1999-2001 models:
2002-2004 models:
Valve Seat Width
Standard (New): 1.25
1.55 mm (0.049
0.061 in.)
Service Limit:
2.00 mm (0.079 in.)
6-51
Valve Seat Reconditioning
30°
45°
60°
60°
30°
45°
67.5°
B
A
1. Inspect valve stem-to-guide clearance (see page 6-
48). If the valve guides are worn, replace them (see
page 6-49) before cutting the valve seats.
2. Renew the valve seats in the cylinder head using a
valve seat cutter.
3. Carefully cut a 45° seat, removing only enough
material to ensure a smooth and concentric seat.
4. Bevel the upper and lower edges at the angles
shown in the illustration.
Check the width of the seat and adjust accordingly.
5. Make one more very light pass with the 45° cutter
to remove any possible burrs caused by the other
cutters.
6. After resurfacing the seat, inspect for even valve
seating. Apply Prussian Blue compound (A) to the
valve face. Insert the valve in its original location in
the head, then lift it and snap it closed against the
seat several times.
7. The actual valve seating surface (B), as shown by
the blue compound, should be centered on the seat.
• If it is too high (closer to the valve stem), you
must make a second cut with the 60° cutter (1999-
2001 models and 2002-2004 models exhaust
side) or the 67.5° cutter (2002-2004 models intake
side) to move it down, then one more cut with the
45° cutter to restore seat width.
• If it is too low (close to the valve edge), you must
make a second cut with the 30° cutter to move it
up, then make one more cut with the 45° cutter to
restore seat width.
NOTE: The final cut should always be made with
the 45° cutter.
(cont’d)
(exhaust seat)
(intake seat)
03/07/29 09:11:53 61S0X050_060_0051
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст