LUBRICATION
SYSTEM
TROUBLESHOOTING
Oil level t oo low
•
Oil consumption
•
External oil
leak
•
Worn piston rings
•
Improperly
inst
alled p iston rings
•
Worn cylinders
•
Worn stem seals
•
Worn valve g
uide
Low oil pressure
•
Oil
level
low
•
Clogged oil
strainer
•
Internal
oil
leak
•
Incorrect
oil being used
No oil pressure
•
Oil level
too low
•
Oil pressure relief valve
stuck
open
•
Broken oil pump drive chain
•
Broken oil pump drive or
driven
sprocket
•
Da maged oil pump
•
Internal
oil
leak
High
oil pressure
•
Oil pressure relief valve stuck closed
•
Clogged oil filte r, gallery
or
metering
orifice
•
Incorrect oil being used
Oil contamination
•
Oi
l
or fi
Iter
not
changed
often
enough
•
Worn piston rings
Oil emulsification
•
Blown cylinder head
gasket
•
Leaky coolant passage
•
Entry of water
4-4