Important: Install the piston onto the connecting rod with the mark and the arrow (2)
oriented toward the front of the engine.
- Coat the piston pin with engine oil.
- Align the connecting rod with the piston.
- Push the piston pin through
the connecting rod and the piston bore by hand.
Important: The piston pin snap ring end gap should not be aligned with the pin
hole cutout portion of the piston.
- Install new snap rings using a small screwdriver. Do not gouge the piston (1)
when installing the snap rings.
- Ensure that the piston
pin snap ring end gap is not aligned with the pin hole cutout portion of the
piston.
Notice: Use a piston ring expander to install the piston rings. The rings may
be damaged if expanded more than necessary.
- Lubricate the piston ring grooves and the piston rings with engine oil.
- Install the oil control
expander ring.
- Install the lower oil control ring.
- Install the upper oil control ring.
- The lower and upper compression
rings differ from each other in thickness, shape and cylinder wall contact
surface color. The lower ring (2) is marked R and the upper
ring is marked RN.
Install the lower compression ring (2) (second ring) with
the manufacturer's mark facing up.
- Install the upper compression ring (1) (top ring)
with the manufacturer's mark facing up.
- The piston ring end gaps
must be staggered in order to provide an effective compression seal. After
the rings are installed distribute their end gaps as follows:
12.1. | Place the oil ring expander end gap (5) 45 degrees
from the front of the piston (6) on the exhaust side of the engine. |
12.2. | Place the upper oil ring end gap (7) 45 degrees
from the front of the piston (6) on the intake side of the engine. |
12.3. | Place the lower oil ring end gap (3) 180 degrees
from the upper oil control ring end gap. |
12.4. | Place the lower compression ring end gap (5) 45 degrees
from the front of the piston (6) on the exhaust side of the engine. |
12.5. | Place the upper compression ring end gap (2) 180 degrees
from the lower compression ring end gap. |