Inspection / Repair - Valve Seat / Valve Spring
B2-77spec tableValve Seat (continued)
- 7Check the sinking of the valve seat. Measure the protruding length (dimension L) of the valve stem. (1) If L is as below, it can be used as it is: 41.5-42.0 mm {1.634-1.653 in}. (2) If L is as below, insert a washer onto the spring seat area so that L will be as specified: 42.1-43.0 mm {1.658-1.692 in}. (3) If L is as below or more, replace the cylinder head: 43.1 mm {1.697 in}.
| Specification | Value |
|---|---|
| Dimension Lstandard | 41.5 {1.634}mm {in} |
| Dimension L (use as is)(1) | 41.5-42.0 {1.634-1.653}mm {in} |
| Dimension L (insert washer)(2) | 42.1-43.0 {1.658-1.692}mm {in} |
| Dimension L (replace cylinder head)(3) or more | 43.1 {1.697}mm {in} |
Dimension Lstandard
41.5 {1.634}mm {in}
Dimension L (use as is)(1)
41.5-42.0 {1.634-1.653}mm {in}
Dimension L (insert washer)(2)
42.1-43.0 {1.658-1.692}mm {in}
Dimension L (replace cylinder head)(3) or more
43.1 {1.697}mm {in}
Valve Spring
- 1Inspect the valve springs for cracks and damage.
- 2Check the free length of each spring.
- 3Measure spring pressure when the spring length is compressed to 35.5 mm {1.398 in}. Replace if necessary.
- 4Check the out-of-square of the springs. Replace as necessary.
| Specification | Value |
|---|---|
| Free lengthStandard | 46.92 {1.847}mm {in} |
| Free lengthMinimum, with a set load of 233.0-263.6 N {23.75-26.88 kgf, 52.25-59.14 lbf} | 38.7 {1.524}mm {in} |
| Out-of-squaremax. | 1.63 {0.064}mm {in} |
Free lengthStandard
46.92 {1.847}mm {in}
Free lengthMinimum, with a set load of 233.0-263.6 N {23.75-26.88 kgf, 52.25-59.14 lbf}
38.7 {1.524}mm {in}
Out-of-squaremax.
1.63 {0.064}mm {in}