PR25DD engine: Valve
Valve Dimensions
Unit: mm (in)
|
Valve head diameter (D) |
Intake |
35.5 - 35.8 (1.398 - 1.409) |
|
Exhaust |
30.3 - 30.6 (1.193 - 1.205) |
|
|
Valve length (L) |
Intake |
101.72 (4.0047) |
|
Exhaust |
102.78 (4.0464) |
|
|
Valve stem diameter (d) |
Intake |
5.465 - 5.480 (0.2152 - 0.2157) |
|
Exhaust |
5.455 - 5.470 (0.2148 - 0.2154) |
|
|
Valve seat angle |
Intake |
45 deg. 15' - 45 deg. 45' |
|
Exhaust |
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|
Valve margin (T) |
Intake |
1.1 (0.043) |
|
Exhaust |
1.4 (0.055) |
|
Valve Spring
|
Free height standard |
48.20 (1.898) |
|
|
Installation height |
35.96 mm (1.4157 in) |
|
|
Installation load |
153 N - 173 N (15.6 kg - 17.6 kg, 34.4 lb - 38.9 lb) |
|
|
Height during valve open |
25.76 mm (1.0142 in) |
|
|
Load with valve open |
320 N - 360 N (32.6 kg - 36.7 kg, 71.9 lb - 80.9 lb) |
|
|
Identification color |
Purple |
|
|
Out-of-square |
2.1 mm (0.083 in) |
|
Valve Oil Seal
Unit: mm (in)
|
Description |
Standard |
|
Valve oil seal installation height (A) |
11.8 - 12.4 (0.465 - 0.488) |
Valve Guide
Unit: mm (in)
|
Description |
Standard |
Service |
|
|
Valve guide |
Outer diameter |
9.523 - 9.534 (0.3749 - 0.3754) |
9.723 - 9.734 (0.3828 - 0.3832) |
|
Inner diameter (Finished size) |
5.500 - 5.518 (0.2165 - 0.2172) |
||
|
Cylinder head valve guide hole diameter |
9.475 - 9.496 (0.3730 - 0.3739) |
10.175 - 10.196 (0.4006 - 0.4014) |
|
|
Interference fit of valve guide |
0.027 - 0.059 (0.0011 - 0.0023) |
||
|
Standard |
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|
Valve guide clearance (Standard) |
Intake |
0.020 - 0.053 (0.0008 - 0.0021) |
|
|
Exhaust |
0.030 - 0.063 (0.0012 - 0.0025) |
||
|
Valve guide clearance (Limit) |
Intake |
0.08 (0.003) |
|
|
Exhaust |
0.09 (0.004) |
||
|
Projection length (L) |
Intake |
10.1 - 10.3 (0.398 - 0.406) |
|
|
Exhaust |
10.0 - 10.4 (0.394 - 0.409) |
||
Valve Seat
Unit: mm (in)
|
Description |
Standard |
Service |
|
|
Cylinder head seat recess diameter (D) |
Intake |
36.500 - 36.516 (1.4370 - 1.4376) |
37.000 - 37.016 (1.4567 - 1.4573) |
|
Exhaust |
31.500 - 31.516 (1.2402 - 1.2408) |
32.000 - 32.016 (1.2598 - 1.2605) |
|
|
Valve seat interference fit |
Intake |
0.081 - 0.113 (0.0032 - 0.0044) |
|
|
Exhaust |
0.084 - 0.116 (0.0033 - 0.0046) |
||
|
Valve seat outer diameter (d) |
Intake |
36.597 - 36.613 (1.4408 - 1.4415) |
37.097 - 37.113 (1.4605 - 1.4611) |
|
Exhaust |
31.600 - 31.616 (1.2441 - 1.2447) |
32.100 - 32.116 (1.2638 - 1.2644) |
|
|
Diameter (d1) *1 |
Intake |
33.5 (1.319) |
|
|
Exhaust |
28 (1.10) |
||
|
Diameter (d2) *2 |
Intake |
34.8 - 35.3 (1.370 - 1.390) |
|
|
Exhaust |
29.6 - 30.1(1.165 - 1.185) |
||
|
Angle (1) |
Intake |
59 deg. - 61 deg. |
|
|
Exhaust |
59 deg. - 61 deg. |
||
|
Angle (2) |
Intake |
88 deg. 45' - 90 deg. 15' |
|
|
Exhaust |
88 deg. 45' - 90 deg. 15' |
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|
Angle (3) |
Intake |
119 deg. - 121 deg. |
|
|
Exhaust |
119 deg. - 121 deg. |
||
|
Contacting width (W) *3 |
Intake |
0.99 - 1.35 (0.0390 - 0.0531) |
|
|
Exhaust |
1.19 - 1.55 (0.0469 - 0.0610) |
||
|
Valve seat height (h) |
5.9 - 6.0 (0.232 - 0.236) |
5.0 - 5.1 (0.197 - 0.201) |
|
|
Cylinder head seat recess depth (H) |
6.0 (0.236) |
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*1 : Diameter made by intersection point of conic angles "1" and "2"
*2 : Diameter made by intersection point of conic angles "2" and "3"
*3 : Machining data