T R O U B L E S H O O T I N G
TM 5-3805-258-24-1
E N G I N E
TROUBLESHOOTING
Troubleshooting can be difficult. On the following pages there is a list of
possible problems. To make a repair to a problem, make reference to the cause
and correction.
This list of problems, causes and corrections will only give an indication of
where a possible problem can be, and what repairs are needed. Normally, more
or other repair work is needed beyond the recommendations in the list. Re-
member that a problem is not normally caused only by one part, but by the
relation of one part with other parts. This list can not give all possible problems
and corrections. The serviceman must find the problem and its source, then
make the necessary repairs.
Item
Problem
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Engine Will Not Turn When Start Switch is
On.
Engine Will Not Start.
Misfiring or Running Rough.
Stall at Low rpm.
Sudden Changes In Engine rpm.
Not Enough Power.
Too Much Vibration.
Loud Combustion Noise.
Loud
Noise (Clicking) From Valve
Compartment.
Oil In Cooling System.
Mechanical Noise (Knock) In Engine.
Fuel Consumption Too High.
Loud Noise From Valves or Valve Operating
Components.
Little Movement of Rocker Arm and Too
Much Valve Clearance.
Valve Rotocoil or Spring Lock is Free.
Item
Problem
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
Oil at the Exhaust.
Little or No Valve Clearance.
Engine Has Early Wear.
Coolant In Lubrication Oil.
Too Much Black or Gray Smoke.
Too Much White or Blue Smoke.
Engine Has Low Oil Pressure.
Engine Uses Too Much Lubrication Oil.
Engine Coolant Is Too Hot.
Starter Motor Does Not Turn.
Alternator Gives No Charge.
Alternator Charge Rate Is Low or Not
Regular.
Alternator Charge Too High.
Alternator Has Noise.
Exhaust Temperature Too High.
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