List Of Possible Causes - Daedong DK-Series Manual

LIST OF POSSIBLE CAUSES

1. Battery capacity low.
2. Bad or corroded electrical connections.
3. Faulty starter motor.
4. Wrong grade of lubricating oil.
5. Starter motor turns engine too slowly.
6. Fuel tank empty.
7. Fault in fuel shutoff.
8. Restriction in a fuel line.
9. Faulty fuel pump.
10. Dirty fuel filter element.
11. Dirty or damaged air filter.
12. Air in fuel system.
13. Faulty fuel injectors or incorrect type.
14. Cold start system used incorrectly.
15. Fault in cold start system.
16. Restriction in fuel tank vent.
17. Wrong type or grade of fuel used.
18. Restricted movement of engine speed
control.
19. Restriction in exhaust pipe.
20. Engine temperature is too high.
21. Engine temperature is too low.
22. Incorrect valve tappet clearances.
23. Air filter incorrectly installed or wrong
type; or air intake blockage.
24. Low oil level.
25. Defective gauge.
26. Dirty lubricating oil filter element.
27. Cooling fan damaged.
28. Fault in engine mounting or flywheel
housing.
29. Engine oil overfilled.
30. Restriction in air or water passages
of radiator.
31. Restriction in breather pipe.
32. Insufficient coolant in system.
33. Vacuum line leaks or fault in crank-
case vent.
34. Fault in fuel injection pump.
35. Broken drive on fuel injection pump.
36. Timing of fuel injection pump is
incorrect.
37. Valve timing is incorrect.
38. Bad compression.
39. Cylinder head gasket leaks.
40. Valve damaged or sticking.
41. Fuel injector sticking, or clogged in-
jector nozzle.
42. Worn or damaged cylinder bores.
43. Leakage between valve and seats.
TROUBLESHOOTING 8-3
44. Piston rings are stuck, worn or
broken.
45. Valve stems and/or guides are worn.
46. Crankshaft bearings are worn or
damaged.
47. Lubricating oil pump is worn.
48. Relief valve does not close.
49. Relief valve does not open.
50. Relief valve spring is broken.
51. Oil pump suction blocked or damaged.
52. Piston is damaged.
53. Piston height is incorrect.
54. Flywheel housing or flywheel is not
aligned correctly.
55. Sticking or incorrect type of ther-
mostat.
56. Restriction in coolant passages.
57. Water pump failure.
58. Valve stem seal is damaged
(If equipped).
59. Oil sump strainer clogged.
60. Valve spring is broken.
61. Drive belt for water pump is loose.
62. Faulty cold start switch/faulty wiring.