Spare part connecting rod kits
Spare part connecting rods are only available as
kits.
Engine type Number of
cylinders
Order number
33 3 8366 40968
44 4 8367 40859
49 4 8367 40859
66 6 8368 40928
74 6 8368 40928
84 6 8370 79475
98 7 8370 79496
3.6.4 Changing piston rings
NOTE: Be careful when handling the pistons to prevent any scratches.
Procedure
1.
Remove the piston rings with piston ring
pliers 9052 46900.
NOTE: Be careful when handling the piston
rings to prevent any damage to the piston
ring sliding surface.
• Do not open the piston rings more than is
necessary to prevent any permanent
changes in the shape of the piston rings.
• Make sure that the piston rings are fitted
in the same grooves, if the piston rings
are used again.
2.
Clean the piston ring grooves.
Prevent making scratches to the piston ring
grooves.
3.
Measure the piston ring clearance.
NOTE: The piston ring clearance must be
smaller than 0.15 mm.
If the clearance is too large, determine
whether the piston rings or the piston ring
grooves are worn.
4.
Change worn parts.
Fig. 52
5.
Measure the piston ring gap by pushing one
piston ring at a time into the cylinder bore.
33-74 engines: The piston ring gap must not
be larger than 1 mm on the 1st and 3rd
piston rings and 1.5 mm on the 2nd piston
ring.
84-98 engines: The piston ring gap must not
be larger than 1 mm on the 1st and 3rd
piston rings and 1.3 mm on the 2nd piston
ring.
Fig. 53
3. Maintenance
4th Generation Engines 3-33
8370 79492
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