G424 Service Manual Adjustment and Troubleshooting188
Loose fan belt tension –Adjust or replace.
Worm or damaged fan belt –Replace.
Oil on fan belt –Clean.
Thermostat not functioning properly –Replace.
Water pump not functioning properly –Replace.
Clogged radiator –Clean radiator and coolant passages.
Incorrect ignition timing –Adjust ignition timing.
Improper engine oil –Refer to lubrication table and replace oil
with a recommended one.
Too lean mixture –Repair or replace carburetor.
Incorrect valve clearance adjustment –Make measurements on or replace auto-
lash adjuster.
Engine out of order –Refer to p.189 and make repairs.
Defective thermostat –Replace thermostat.
Extremely low atmospheric temperature –Place cover or anything proper on the
front of radiator.
Engine out of order –Refer to p.189 and make repairs.
Carburetor out of order –Replace or replace distributor.
Defective distributor –Repair or replace distributor.
Defective spark plug –Replace spark plug.
Engine out of order –Adjust of repair valves.
Defective carburetor –Repair or replace carburetor.
Clogged air bleeder –Clean or replace.
Damaged gaskets –Replace.
Improper idling speed –Adjust idling speed.
Incorrect ignition timing –Adjust ignition timing.
Engine out of order –Refer to p.189 and make repairs.
Engine out of order –Refer to p.189 and make repairs.
Overheating
Insufficient
compression
pressure
Overcooling
(Coolant
temperature does
not rise.)
Engine
Carburetor
Ignition system
Carburetor
Excessive engine
oil consumption
Oil leaks
Ignition system
Engine
Insufficient
output
Poor
acceleration
Excessive
fuel
consumption
Excessive
engine oil
consumption