6
55
Cylinder and piston
Cause:
• Faulty air lter. Small dust particles
pass through the lter.
• The lter is worn out due to too much
cleaning, whereby small holes have
appeared in the material.
• Unsuitable lter maintenance, such
as wrong method or wrong cleaning
agent. Flock material becomes loose
and holes appear.
• Air lter incorrectly tted.
• Air lter damaged or missing.
Action:
Fit a ner grade lter.
Check the lter carefully for holes and
damage after cleaning. Replace the lter if
necessary.
Clean more carefully and use the right
cleaning agent (such as tepid soapy wa-
ter). Change the lter.
Larger, softer particles that penetrate into the engine cause damage to the piston skirt
under the piston ring as the illustration shows.
Cause:
• Air lter incorrectly tted.
• Air lter damaged or missing.
Action:
Fit the air lter correctly.
Fit a new air lter.
Inlet side.
Particles of dust and dirt from carbon-like deposits
on the top of the piston and in the piston ring
groove. The piston ring sits rmly in the groove.
Piston material has been worn away.
The lower part of the piston skirt is thinner on the
inlet side than on the exhaust side.
The piston scored and worn from the piston ring
down on the inlet side.
Fit the lter correctly.
Fit a new air lter.
To Next Page
Loading...
