Specifications

1-6
GROUP 1-ENGINES AND EXHAUST SYSTEMS
ENGINE TROUBLE DIAGNOSIS
EXCESSIVE FUEL
CONSUMPTION
(Continued)
ENGINE OVERHEATS
LOSS OF COOLANT
GUIDE (Continued)
EXHAUST SYSTEM
Check the exhaust gas control
valve operation.
System restricted.
ODOMETER
Check calibration.
IGNITION SYSTEM
Check:
Distributor breaker points.
Ignition timing.
ENGINE
Crankcase ventilation regulator
valve defective or restricted tubes
(Positive Crankcase Ventilation Sys-
tem).
FINAL CHECKS
FUEL SYSTEM
Check:
Fuel pump pressure.
Engine idle speed.
Idle fuel mixture needle(s) for
proper adjustment.
Automatic choke for proper op-
eration.
Fast idle speed screw for proper
adjustment.
Accelerating pump stroke ad-
justment.
TEMPERATURE SENDING
UNIT AND GAUGE
Unit or gauge defective (not in-
dicating correct temperature), or con-
stant voltage regulator defective.
ENGINE
Cylinder head bolts not properly
torqued.
Incorrect valve lash (engines with
mechanical valve lifters).
Low oil level or incorrect viscos-
ity oil used.
COOLING SYSTEM
Leaking radiator.
Loose or damaged hose connec-
tions.
Water pump leaking.
Radiator cap defective.
Overheating.
ENGINE
Cylinder head gasket defective.
Intake manifold to cylinder head
Anti-stall dashpot for proper ad-
justment.
Air cleaner for restrictions.
Float setting or fuel level.
Jets for wear and/or damage.
Power valve operation.
Air bleeds for obstructions.
Accelerating pump discharge noz-
zles for siphoning.
Spark control valve for proper
seating.
Accelerator linkage for binds.
Choke adjustment.
IGNITION SYSTEM
Check:
Spark plug condition and adjust-
ment.
Distributor spark advance opera-
tion.
ENGINE
Perform an engine compression
test to determine which mechanical
component of the engine is at fault.
Check valve lash adjustment (en-
gines with mechanical valve lifters).
COOLING SYSTEM
Check thermostat operation and
heat range.
TRANSMISSION
Check band adjustment (auto-
matic transmissions).
COOLING SYSTEM
Insufficient coolant.
Cooling system leaks.
Drive belt tension incorrect.
Radiator fins obstructed.
Thermostat defective.
Thermostat improperly installed.
Cooling system passages blocked.
Water pump inoperative.
Faulty fan drive.
IGNITION SYSTEM
Incorrect ignition timing.
gasket defective.
Cylinder head or intake manifold
bolts not properly torqued.
Cylinder block core plugs leak-
ing
nig.
Temperature sending unit leak-
ing.
Cracked cylinder head or block,
or warped cylinder head or block
gasket surface.
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