Table of Contents
Advertisement
18 ENGINE
188
Check sealing seat
o
on the valve.
Valve - sealing seat width
Intake
1.60 mm (0.063 in)
v
Valve - sealing seat width
\
2.00 mm (0.0787 in)
Exhaust
If the sealing area is not in the center of the valve seat or deviates from the
specified value:
- Machine the valve seat.
302809-10
18.4.24 Checking valve springs
Check the valve springs for fractures and wear (visual check).
» If the valve spring is fractured or worn:
- Change the valve spring.
Measure the valve spring lengths.
Valve spring
Minimum length (without valve
spring cap)
42.3 mm (1.665 in)
If the measured value does not equal the specified value:
- Change the valve spring.
311878-10
18.4.25 Checking valve spring retainer
Check the valve spring retainer for fractures and wear (visual check).
» If the valve spring retainer is fractured or worn:
- Change the valve spring retainer.
Measure the thickness of the valve spring retainer.
Valve spring cap - thickness
2.4... 2.5 mm (0.094... 0.098 in)
If the measured value does not equal the specified value:
- Change the valve spring retainer.
311879-10
18.4.26 Checking the cylinder head
Check valve guides O with the special tool.
Limit plug gauge (59029026006) (& p. 322)
o
» If the special tool is easy to insert into the valve guide:
-
Change the valve guide and valve.
Check the sealing area of the spark plug thread and the valve seats for damage
and cracking.
» If there is damage or cracking:
-
Change the cylinder head.
Check the sealing area of the cylinder for distortion using a straight edge and the
special tool.
l
311877-10
^
Feeler gauge (59029041100) (Si p. 322)
a
Cylinder/cylinder head - sealing area
distortion
< 0.10 mm (< 0.0039 in)
1
/ ]p
/
If the measured value does not equal the specified value:
- Change the cylinder head.
311876-10
Advertisement
Table of Contents
