ENGINE
Symptoms
and possible causes
Remedy
Pumping up
of
oil
a) Piston ring gaps are
not
positioned
a)
Correct.
correctly
b) Bent
or
twisted connecting rods
b) Replace connecting rods.
c) Worn piston rings
c) Replace piston rings.
d) Worn pistons or cylinders
d) Replace pistons
or
re-bore the
cylinders.
Oil down
a) Defective stem seals
a)
Replace stem seals.
b) Worn valves
or
valve guides
b) Replace valves
or
valve guides.
Abnonnal
sound
or
noises
Sumptoms
and
possible causes
Remedy
Crankshaft main a) Worn bearings
a)
Replace bearings
or
grind the
bearings crankshaft.
b) Worn crankshaft
b) Grind the crankshaft.
c) Fused bearings
c) Replace bearings and check
lu
brication system.
Connecting rods and
a)
Worn connecting rod big end
a)
Replace bearings.
connecting rod bearings bearings
b) Worn crankshaft pins b) Grind the crankshaft.
c)
Bent
connecting rods
c) Correct bend or replace.
Pistons, piston pins and
a)
Worn cylinders
a)
Re-bore and grind cylinders to
piston rings oversize and replace pistons.
b) Worn piston pins b) Replace pistons.
c) Seized pistons
c) Replace pistons and grind
cylinders.
d) Seized pistons and worn or
d) Replace pistons and piston rings.
broken piston rings
--
Camshaft and others
a) Worn camshaft
a)
Replace camshaft.
b) Excessive valve clearance
b) Adjust.
c) Worn timing gear
c) Replace gear.
d) Worn fan pulley bearing
d) Replace bearing.
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