Cylinder heads - valves - valve rockers
Fig. 1 - Main dimensions of valves and valve seat inserts.
Fig. 2 - Rocker support assembly cross-section.
Fig. 3 - Engine cylinder head longitudinal section.
engine
cylinder head
Ø machining Ø max. wear
A valve stem diameter intake mm 9
− 0,028
− 0,013
8.940
exhaust mm 9
− 0,028
− 0,013
8.940
B inside diameter of the valve guides
installed in the heads mm 9
+ 0,025
+ 0,040
9.100
C valve seat angle with respect to valve intake 29°30’
− 15’
0
exhaust 44°30’
− 15’
0
D valve seat width on the valve seat insert intake mm 1.55 1.7
exhaust mm 2.20 2.,35
E valve recess from cylinder head level intake mm 0,8
− 0,1
+ 0,5
1.8
exhaust mm 1
− 0,1
+ 0,5
2
F valve seat taper intake 60°
− 15’
0
exhaust 45°
− 15’
0
G valve diameter intake mm 44.2
exhaust mm 39.5
14
1
45
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