3-5
3
Problem: Engine lacks power
Condition
Remedy
1.
Valve clearance
incorrect
2.
Valve springs
weak
3.
Valve timing
incorrect
4.
Piston ring(s) - cylinder
worn
5.
Valve seating
poor
6.
Spark plug
fouled
7.
Rocker arms - shafts
worn
8.
Spark plug gap
incorrect
9.
Fuel injector
obstructed
10.
Air cleaner element
obstructed
11.
Engine oil
overfilled - contaminated
12.
Intake manifold
leaking air
13.
Cam chain
worn
1. Adjust clearance
2. Replace springs
3. Re-time valve gear
4. Replace - service rings - cylinder
5. Repair seats
6. Clean - replace plug
7. Replace arms - shafts
8. Adjust gap - replace plug
9. Replace injector
10. Clean element
11. Drain excess oil - change oil
12. Tighten - replace manifold
13. Replace cam chain
Problem: Engine overheats
Condition
Remedy
1.
Carbon deposit (piston crown)
excessive
2.
Oil
low
3.
Octane
low - gasoline poor
4.
Oil pump
defective
5.
Oil circuit
obstructed
6.
Intake manifold
leaking air
7.
Coolant level
low
8.
Fan
malfunctioning
9.
Fan switch
malfunctioning
10.
Thermostat
stuck - closed
11.
Radiator hoses - cap
damaged - obstructed
1. Clean piston
2. Add oil
3. Drain - replace gasoline
4. Replace pump
5. Clean circuit
6. Tighten - replace manifold
7. Fill - examine system for leaks
8. Check fan fuse - replace fan
9. Replace fan switch
10. Replace thermostat
11. Clear obstruction - replace hoses
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