17.4.28 Checking valve springs
304678-10
17.4.29 Checking valve spring seat
304679-10
17.4.30 Checking the cylinder head
310049-10
17 ENGINE
-
Check the valve springs for breakage and wear (visual
check).
If the valve spring is broken or worn:
-
Change the valve spring.
-
Measure the length of the valve springs.
Valve spring
Intake minimum length
40. 7 mm (1.602 in)
(without valve spring
seat)
Valve spring
Exhaust minimum length 40. 7 mm (1.602 in)
(without valve spring
seat)
If the measured value does not meet specifications:
-
Change the valve spring.
-
Check the valve spring seat for breakage and wear (visual
check).
If the valve spring seat is broken or worn:
-
Change the valve spring seat.
-
Measure the thickness of the valve spring seat.
Valve spring
Valve spring seat
1 .8 mm (0.071 in)
If the measured value does not meet specifications:
-
Change the valve spring seat.
-
Check exhaust valve guides
O
using the special tool.
I
Limit plug gauge (59029026006) (
l!l;,!
p. 295)
If the special tool is easy to insert in the valve guide:
-
Change the valve guide and valve.
Check intake valve guides
8
using the special tool.
I
Limit plug gauge (59029026006) (
0
p. 295)
If the special tool is easy to insert in the valve guide:
-
Change the valve guide and valve.
-
Check the sealing area of the spark plug thread and the valve
seats from damage and cracking.
If there is damage or cracking:
-
Change the cylinder head.
205
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Страница 157: ...16 BRAKE SYSTEM Check the foot brake lever for a firm pressure point 155 ...
Страница 281: ...28 SERVICE SCHEDULE 279 ...