18 ENGINE
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:
-
Change 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.
-
Measure the piston at the piston skirt, at right angles to the
piston pin, at a distance G).
Guideline
Distance
0
27 mm (1.06 in)
Piston - diameter
Size I
77.955 ... 77.965 mm
(3.06909 ... 3.06948 in)
Size II
77.965 ... 77.975 mm
(3.06948 ... 3.06988 in)
Info
Piston dimensions
O
are marked on the piston head.
18.4.16 Measuring the piston/cylinder mounting clearance
308787-10
-
Check/measure the cylinder. (
I!!)
p. 188)
Check/measure the piston. (
I!!)
p. 188)
- The smallest piston/cylinder mounting clearance equals the
smallest cylinder bore diameter minus the largest piston
diameter. The largest piston/cylinder mounting clearance
equals the largest cylinder bore diameter minus the smallest
piston diameter.
Guideline
Piston/cylinder - mounting clearance
Size I
0.035 ... 0.057 mm (0.00138
... 0.00224 in)
Size II
0.037 ... 0.060 mm (0.00146
... 0.00236 in)
Wear limit
0.070 mm (0.00276 in)
189
Содержание F2103P4
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