VI. THERE IS ABNORMAL NOISE WHEN ENGINE RUNNING
EN
TROUBLE
There is noise of beating
or piston slap is heard.
There is metal-beaten
noise in abnormal com-
bustion.
The other.
40
CAUSE
Piston or piston ring or cylinder is worn. Replace the worn.
Tie rod or piston pin and piston pin.
Main bearing of crankshaft is worn.
Piston ring is broken.
Too much carbon deposit in combust-
ing chamber.
Too small electrodes clearance of spark
plug.
Engine is flooded with fuel.
Improper fuel brand.
Engine is excessively hot.
Improper valve clearance.
Fly wheel is not connected to crankshaft
tightly.
REMEDY
Replace the worn.
Replace.
Replace.
Clear away carbon deposit.
Adjust electrodes clearance
properly.
Check relative parts such as car-
buretor.
Replace fuel.
Shoot trouble.
Readjust valve clearance prop-
erly.
Connect tightly.