Scania 16 litre engine. Work Description — part 10
0101w14b.mkr
©
37
Checking and machining
Specifications
Intake valve
Head angle
19.5°
Minimum dimension A for ground valve
2.6 mm
Exhaust valve
Head angle
44.5°
Minimum dimension A for ground valve
1.8 mm
Minimum dimension A for ground valve
Check dimension A on all valves.
Grind the valves in a valve grinding machine.
Cylinder head
38
©
0101w14b.mkr
Valve stem seal
Renewal
Special tools
1
Dismantle the cylinder head as described in
dismantling.
2
Remove the valve stem seal with a pair of
pliers.
3
Fit the valve.
Number
Designation
Illustration
Tool board
99 323
Drift
D 5
01_1348
4
Tap in a new valve stem seal carefully using
tool 99 323 and a hammer.
01_1349
99 323
Cylinder head
0101w14b.mkr
©
39
Valve seats
Renewal
Special tools
1
Remove the valve seat inserts. Use a
discarded valve that has been ground so that
the diameter of the disc is slightly smaller
than the inside diameter of the seat.
Number
Designation
Illustration
Tool board
99 384
Drift
D1-A3
99 385
Shank
D1-B1
99 384
110 966
99 385
11
0
96
7
Valve welded in place
2
Fit the valve and weld around it with an
electric welder. Cool with water. Turn over
the cylinder head and knock the valve stem
so that the valve and seat insert fall out.
!
WARNING!
Wear protective goggles. Always turn the
cylinder head with the underside face
down while knocking out the valve seat
insert. Otherwise, there is a risk that
loose shivers of metal can cause
personal injury.
Cylinder head
40
©
0101w14b.mkr
3
Press in new valve seat inserts. Use drift
99 384 and shaft 99 385. Cool the drift and
valve seat to approximately –80
°
C in carbon
acid ice or with liquid oxygen. Pressing
must be carried out rapidly.
!
WARNING!
Be careful when handling the cold parts
and the cooling agents named above.
Risk for frost injuries.
Oversize valve seat inserts can be fitted if the
valve seat insert position has been damaged. The
position must then be machined using tool
587 277.
Cylinder head
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст