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30/ENGINE - WORK ON INDIVIDUAL PARTS
Checking the piston ring end gap
20.14
Checking the piston/cylinder mounting clearance
20.15
–
Check/measure the cylinder. (
–
Check/measure the piston. (
–
The smallest piston/cylinder mounting clearance is the result of the smallest cylinder bore diameter minus the largest piston diam-
eter. The largest piston/cylinder mounting clearance is the result of the largest cylinder bore diameter minus the smallest piston
diameter.
Guideline
Piston/cylinder - mounting clearance
New condition
Wear limit
Work on the cylinder head
20.16
Info
The following operations apply to both cylinder heads.
–
Piston size
200476-10
–
Remove the piston ring from the piston.
–
Place the piston ring in the cylinder and align it with the piston.
Guideline
Under the upper edge of the cylinder
–
Measure the end gap with special tool
Guideline
Piston ring end gap
200477-10
Feeler gauge (59029041100) (
»
If the end gap is more than the specified value:
–
Check/measure the cylinder. (
»
If the cylinder wear is within the tolerance range:
–
Change the piston ring.
–
Mount the piston ring with the marking facing toward the piston head.
p. 102)
p. 103)
–
Remove oil pressure switch
Info
This only applies to the front cylinder head!
–
Remove coolant temperature sensor
–
Remove screw
–
Remove vacuum connection
–
Remove O-rings
200466-10
is marked on the piston head.
p. 196)
0.015... 0.057 mm (0.00059... 0.00224 in)
0.150 mm (0.00591 in)
.
.
.
.
.
10 mm (0.39 in)
.
≤ 0.5 mm (≤ 0.02 in)
p. 102)
104
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