Measure inner diameter of valve guide - use Gauge MKM-571-B and inner micrometer. Valve oversizes may already be present ex works. Oversize identification: at the valve guide and valve shaft end with the following codes/letters - see "Technical Data".
|
Size |
Reamer |
Identification |
|
|
|
Production |
Service |
|
Normal |
|
none |
K |
|
0.075 mm |
KM-253 1) |
1 |
K1 |
|
0.150 mm |
KM-254 1) |
2 |
K2 |
|
0.250 mm |
KM-255 |
- |
A |
1) or use KM-664. Ream valve guide from upper side of cylinder head to next oversize. After reaming, cross out code and emboss with new code. | 
Measure 