54°06÷'03°06
αα
αα
α
1
αα
αα
α
AB CDE
6,63÷4,63450,11÷540,11810,11÷000,1102,6÷08,558,9÷57,9
ABC
0,04÷5,93020,7÷500,7099,6÷069,6
85
86
Valve, specifications
Exhaust valve A
Shaft and head are made of 2 different materials.
2 Welded joint
3 Chromium-plated joint
4 Portion made of: ........ X 45 Cr Si 8 UNI 3992
5 Portion made of: ........ X 70 Cr Mn NI N 216 UNI 3992
Intake valve B
Material: X 45 Cr Si 8 UNI 3992
1 = Chromium-plated joint
Valve guides and valve guide housings
Both intake and exhasut valve guides are identical dimensionally and
are made from phosphoric gray iron with a pearlitic matrix:
Dimensions (mm):
Note: Valve guides are supplied in finished form,
further machining
is prohibited.
Valve guides with outside diameter B increased by 0.5 mm.
are available.
Valve guide insertion
Fit the guides with a punch taking account of value A in relation to
the cylinder head surface.
Dimensions (mm):
Clearance (mm):
(B-C) = 0,015÷0,050 (B- C) limite usura = 0,10
Disassembly / Reassembly
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