1. Check the free height of each valve spring and replace if necessary.
2. Using a square, test the squareness of each valve spring. If the spring is excessively out-of-square, replace it.
Valve spring
Standard value
Free height : 42.5mm (1.6732 in.)
Load : 21.9kg/35mm (48.4 lb/1.3780in.)
Out of squareness : Max. 1.5°
Service limit
Load : 21.9kg/34mm (48.4 lb/1.3386in.)
Out of squareness : Max. 3°
1. Using the special tool (09221-3F100 A/B), withdraw the old valve guide out the bottom of the cylinder head.
2. Recondition the valve guide hole so that it can receive the newly press-fitted oversize valve guide.
Valve Guide Oversizes
Size mm (in.) Size mark
Oversize valve guide hole size
mm(in.)
0.05 (0.002) O.S. 5
11.050 ~ 11.068
(0.435 ~ 0.4357)
0.25 (0.010) O.S. 25
11.250 ~ 11.268
(0.443 ~ 0.4436)
0.50 (0.020) O.S. 50
11.500 ~ 11.518
(0.453 ~ 0.4535)
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