ENGINE
25
Fig. 5
VALVE SEAT INSERTS:
Fig. 5
INLET
EXHAUST
Standard Repair Standard Repair
Repair
size-I
size-II
size-I
size-II
O.D. of valve seat
45.880
46.180 46.380
38.080 38.380 38.580
insert 'I'
mm 45.870
46.170 46.370
38.070 38.370 38.570
Basic bore in cylinder head
45.825
46.125 46.325
38.025 38.325 38.525
for valve seat insert 'I'
mm 45.800
46.100 46.300
38.000 38.000 38.500
Interference of valve seat
insert in cylinder head.
mm
0.045-0.080
0.045-0.080
Depth of parent bore in
cylinder head 'J'
mm
11.2 - 11.0
11.2 - 11.0
Height of valve seat
insert 'K'
mm
8.0 - 7.9
8 2 - 8.1
Distance of parting surface of
of cyl. head from face of valve
seat insert 'G'
mm
3.3 + 0.2
3.1 + 0.2
-10'
-10'
Valve seat angle in cyl. head
45
0
-20,
45
0
-20,
Valve seat free cutting angle
–
15
0
Width of valve seat in cyl.
head 'H'
mm
1.6-2.0
2.0-2.5
Maximum diameter of the valve
seat in cylinder head 'F'
mm
43.4 - 43.38
35.4 - 35.38




