ENGINE

1. Engine will not crank.
a. Improper starting procedure.
b. Defective starter.
c. Hydrostatic lock.
d. Seized piston.
e. Seized bearings.

2. Engine cranks normally, but will not start.
a. Malfunction of fuel system.
b. Malfunction of ignition system.
c. Low compression.

3. Engine starts but fails to
keep running.
a. Defective vehicle electrical connection.
b. Malfunction of fuel system.
c. Malfunction of ignition system.
d. Leaking cylinder head gasket.
e. Improper functioning intake and exhaust valves.
f. Low compression.

4. Engine runs but misses.
a. Malfunction of ignition system.
b. Malfunction of fuel system.
c. Improper valve clearance.
d. Low compression-leaking valves or worn piston rings.
e. Excessive exhaust back pressure.
f. Engine fails to reach proper operating temperature.
g. Blown head gasket.
h. Engine overheating.
i. Cracked cylinder head.

5. Rough engine idle.
a. Malfunction of fuel system.
b. Malfunction of ignition system.
c. Improper valve clearance.
d. Cracked cylinder head.
e. Dirty or defective positive crankcase ventilation valve.
f. Sticking, worn piston ring or poorly seated valves.
g. Improper cylinder head bolt torque.

6. Poor acceleration.
a. Malfunction of fuel system.
b. Malfunction of ignition system.
c. Improper valve clearance.
d. Grease or oil on clutch driven disk facing.
e. Worn clutch driven disk facing.
f. Weak or broken clutch pressure plate springs.
g. Cold engine.

7. Engine does not develop full power or has poor high speed performance.
a. Malfunction of fuel system.
b. Malfunction of ignition system
c. Engine cold.
d. Engine overheating.
e. Low compression.
f. Dirty or defective positive crankcase ventilation valve.
g. Improper valve clearance.
h. Worn camshaft or valve rocker arm.
i. Malfunction of valve train.

8. Engine emits black smoke (gasoline).
a. Rich fuel mixture.
b. Defective carburetor.

9. Engine emits blue gray smoke (oil).
a. High oil consumption.
b. Worn piston rings or broken piston.

10. Knocking noise.
a. Worn main or connecting rod bearings.
b. Excessive crankshaft end play.
c. Worn or broken piston.

11. Tapping noise.
a. Improper valve clearance.
b. Sticking valves.
c. Defective or sticking valve rocker arms.
d. Weak or broken valve spring.
e. Broken or worn valve rocker arm.
f. Cracked or burned valves.

12. Grinding noise.
Defective bearing gear.

13. Squealing noise.
a. Grease or oil on clutch driven disk facing.
b. Worn clutch driven disk facing.
c. Weak or broken clutch pressure springs.
d. Clutch slipping.

14. Pinging noise (detonation or preignition).
a. Distributor not properly timed.
b. Improper distributor advance.
c. Improper grade fuel.
d. Improper spark plug heat range.
e. Excessive combustion chamber deposits noticeable when engine is accelerated while hot.

15. Engine overheating indication.
a. Faulty sending unit or indicator.
b. Improper tightening of cylinder head bolts.
c. Malfunctioning of cooling system.
d. Faulty Thermostat.
e. Ignition timing incorrect.
f. Cracked or burned valves.
g. Restricted exhaust system.

16. Engine fails to reach normal operating temperature.
a. Faulty sending unit or indicator.
b. Faulty engine thermostat or incorrect heat range.

CRANKCASE VENTILATION SYSTEM

17. Erratic idling.
a. Defective metering valve.
b. Leak or hole in line or fitting.

STARTING SYSTEM

18. Starter will not crank engine.
a. Improper starting procedure used.
b. Low battery voltage.
c. No electrical current to starter motor.
d. Locked starter drive.
e. Defective starter.

19. Starter runs but will not crank engine.
a. Worn, dirty, or defective starter drive.
b. No electrical current to starter motor.

20. Starter cranks engine slowly.
a. Low battery voltage.
b. Improper grade engine oil.
c. Defective starter.
d. Tight engine.

IGNITION SYSTEM

21. Engine cranks normally but will not start.
a. Improper starting procedure used.
b. No electrical current to distributor coil.
c. Improperly adjusted or defective breaker points.
d. Fouled or improperly adjusted spark plugs.
e. Defective coil.

22. Engine starts but fails to keep running.
a. Improperly adjusted or defective breaker points.
b. Fouled spark plug.

23. Engine runs but misfires steadily at all speeds.
a. Defective or crossed spark plug cables.
b. Fouled spark plug.
c. Defective distributor cap.

24. Engine runs but misfires (intermittently at all speeds).
a. Fouled spark plug. a
b. Improperly adjusted or defective breaker points.
c. Defective coil, condenser, rotor, or cap.

25. Engine runs but misfires (at idle only).
a. Improperly adjusted or defective breaker points.
b. Defective coil, condenser, rotor or cap.
c. Defective spark plug cable.
d. Excessive play in distributor or worn distributor cam.

26. Poor acceleration or excessive fuel consumption.
a. Distributor not properly timed.
b. Fouled or improperly adjusted spark plug.
c. Improperly adjusted or defective breaker points.

27. Engine does not develop full power or has poor high speed performance.
a. Distributor not properly timed.
b. Fouled or improperly adjusted spark plug.
c. Improper distributor internal advance.
d. Improperly adjusted or defective breaker points.
e. Excessive play in distributor or worn distributor cam.
f. Defective coil, condenser, rotor, or cap.
g. Dirty or defective positive crankcase ventilation valve.

28. Engine overheating.
a. Late ignition timing.
b. Improper distributor advance.

FUEL SYSTEM

29. Engine cranks normally but will not start.
a. Incorrect starting procedure.
b. Incorrect choke linkage adjustment.
c. No fuel to carburetor caused by lines clogged with dirt, water, or ice.
d. Defective fuel pump.
e. Overchoked (flooded).,
g. Carburetor fuel setting too high.
h. Carburetor flooding.

30. Engine starts but fails to keep running, runs rough, or misfires at idle.
a. Incorrect starting procedure.
b. Incorrect choke linkage.
c. Incorrect idle fuel mixture.
d. Idle speed set too low
e. Carburetor fuel setting too high.
f. Carburetor flooding.
g. Dirt or water in lines or carburetor.
h. Clogged fuel filter.
i. Defective fuel supply system.
j. Defective fuel pump.

31. Engine runs hot or runs rough and misfires, or has poor high speed
performance (lean mixture).
a. Defective fuel supply system.
b. Defective fuel pump (low fuel pressure).
c. Clogged fuel filter.
d. Dirt or water in fuel lines or carburetor.
e. Inoperative or defective carburetor accelerating pump.
f. Carburetor float setting too low.

32. Engine emits black smoke and runs rough (rich mixture).
a. Incorrect idle fuel mixture.
b. Defective fuel pump (high fuel pressure).
c. Improper use of choke or sticking choke.
d. Float setting too high.
e. Defective carburetor.
f. Dirty or defective positive crankcase ventilation valve.

GENERATOR SYSTEM

33. Generator turns. Will not charge.
a. Defective generator regulator.
b. Cables not properly connected.
c. Defective generator.

34. Generator does not turn.
a. Defective generator.
b. Drive belts worn or loose.

LUBRICATION SYSTEM

35. Low oil pressure.
a. Improper grade engine oil.
b. High oil temperature.
c. Clogged oil filter.
d. Damaged oil pan, restricting oil pick-up tube inlet.
e. Diluted engine oil.
f. Defective or clogged oil tube and screen assembly.
g. Worn rod or main bearings and/or camshaft bearing.

36. High oil pressure.
a. Improper grade engine oil.
b. Defective or stuck oil pressure relief valve.

37. Fluctuating oil pressure.
a. Low crankcase oil level.
b. Clogged oil filter.
c. Defective or clogged oil pick-up tube and screen assembly.
d. Damaged oil pan, restricting oil pick-up tube inlet.
e. Defective oil pressure relief valve.
f. Defective oil pump.
g. Worn bearings.

38. High oil temperature.
a. Improper grade engine oil or low oil level.
b. High coolant temperature.
c. Lean fuel mixture.
d. Improper ignition timing.
e. Tight engine bearing.

39. High oil consumption.
a. Improper grade engine oil.
b. High oil temperature.
c. Engine oil leaks.
d. Worn piston rings or cylinders.
e. Worn valve stems, valve guides, or defective valve seals.

COOLING SYSTEM

40. Engine overheats.
a. Insufficient coolant.
b. Coolant system leaks.
c . Incorrect belt tension.
d. Defective thermostat.
e. Cooling system passages blocked.
f. Defective fan blade.

41. Engine fails to reach normal operating temperature.
a. Defective thermostat or incorrect heat range.
b. Defective temperature sending unit.

42. Loss of coolant.
a. Loose or damaged hose connection.
b. Water pump leaking.
c. Defective cylinder head gasket.
d. Improper torque of cylinder head bolts.
e. Cylinder block and head expansion plugs leaking.
f. Cracked or warped cylinder head or block.

EXHAUST SYSTEM

43. Unusual noise.
a. Break or crack in exhaust muffler.
b. Loose or damaged connections.

44. Exhaust system restricted.
Muffler outlet pipe or pipes damaged.