305004-10
18 ENGINE
Info
The cylinder size
O
is marked on the cylinder collar.
-
Using a straightedge and the special tool, check the sealing
area of the cylinder head for distortion.
I
Feeler gauge (59029041100) (
�
p. 360)
Cylinder/cylinder head - dis-
:;; 0.10 mm (:;; 0.0039 in)
tortion of sealing area
If the measured value does not meet specifications:
-
Change the cylinder.
18.4.15 Checking/measuring the piston
e-'
•
400995-10
305017-10
-
Use the special tool to measure clearance
6)
of the piston
rings in the piston ring groove.
Guideline
Piston ring - groove clear
ance
:;; 0.08 mm(:;; 0.0031 in)
I
Feeler gauge (590290411 00) (
�
p. 360)
If play
6)
is larger than the specified value:
-
Change the piston and piston rings.
-
Check/measure the cylinder. (
�
p. 206)
-
Check the piston sliding surface for damage.
If the piston sliding surface is damaged:
-
Replace the piston and, if necessary, the cylinder.
-
Check that the piston rings move easily in the piston ring
grooves.
If the piston ring is stiff:
-
Clean the piston ring groove.
Tip
An old piston ring can be used to clean the
piston ring groove.
-
Check the piston rings for damage.
If the piston ring is damaged:
-
Replace the piston ring.
•
Info
I
Mount the piston ring with the marking facing
upward.
-
Check the piston pins for discoloration or signs of wear.
If the piston pin shows severe discoloration/signs of wear:
-
Change the piston pin.
-
Place the piston pin in the connecting rod and check the
seating for play.
If the piston pin seating has excessive play:
-
Change the connecting rod and piston pin.
207
Summary of Contents for F2203P4
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