Inspecting The Piston Rings; Fitting The Piston - MOTO GUZZI V85 E4 Service Station Manual

Engine

Inspecting the piston rings

•
Clean off any carbon deposits from the
grooves in the piston rings and from the
rings themselves.
•
Measure the piston ring side clearance
and replace the piston and the piston
rings all together if not complying with
specifications.
Type Maximum clearance between the rings
Upper ring
Intermediate ring
Oil scraper ring
•
Fit the piston ring to the cylinder.
•
Level the installed piston ring with the piston crown.
•
Measure piston ring port and replace it if not complying with specifications.
CAUTION
IT IS NOT POSSIBLE TO MEASURE THE CLEARANCE OF THE END OF THE OIL SCRAPER RING:
IF THERE IS EXCESSIVE PLAY, REPLACE THE THREE ELASTIC RINGS.
•
Insert the piston rings paying attention to their mounting direction and end gap arrangement;
the end gaps must be approximately 180 degrees from each other.

Fitting the piston

•
Place the piston on the connecting rod
notch
CAUTION
MOUNTING POSITION IS INDICATED BY AN ARROW
POINTING IN THE DIRECTION OF TRAVEL
ENG - 84
S (MAXIMUM WEAR VALUES)
EAL RING CLEARANCE
and cables on the piston
0.07 mm (0.0028 in)
0.06 mm (0.0024 in)
0.18 mm (0.0071 in)
Engine V85 E4
Maximum opening of the rings mounted on the
piston
0.10-0.30 mm (0.0039-0.0118 in)
0.35-0.55 mm (0.0138-0.0217 in)
0.20-0.70 mm (0.0079-0.0276 in)