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Piston Rings, Replace
 Remove
| 1. |
Remove piston with con-rod
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Important: Do not damage the
piston and con-rod. Use protective jaws.
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| 2. |
Clamp piston with con-rod in vice
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Important: The maximum spread of
the ring gap must not exceed dimension I ( 28 mm )
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| 3. |
Detach piston rings
| • |
Detach 3x piston rings with piston ring pliers (1)
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| 4. |
Check piston ring gap with feeler gauge
| • |
Insert piston ring in cylinder bore
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| • |
Permitted gap:
| – |
1st compression ring (1) 0.20 –
0.30 mm
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| – |
2nd compression ring (2) 1.00 –
1.50 mm
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| – |
Oil scraper ring (3) 0.25 – 0.50
mm
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| 5. |
Check piston ring axial clearance with feeler gauge in piston
ring groove
| • |
Permitted axial clearance:
| – |
1st compression ring (1) 0.09 –
0.13 mm
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| – |
2nd compression ring (2) 0.04 –
0.08 mm
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| – |
Oil scraper ring (3) 0.03 – 0.07
mm
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Install
Important: The maximum spread of
the ring gap must not exceed the dimension ( 28 mm )
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| 6. |
Attach piston rings
| • |
Insert 3x piston ring in ring groove with piston ring
pliers
Note: Note markings on
piston rings.
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| 7. |
Set piston ring gap
| • |
Arrange piston ring gaps so that they are offset by 120° with respect to each other
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| 8. |
Remove piston with con-rod from vice
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| 9. |
Install piston with con-rod 
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