Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Troubleshooting Chart
|
Symptom |
Check items |
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|
Cooling system parts malfunction |
Poor heat transfer |
Water pump malfunction |
Worn or loose drive belt |
-- |
|
Thermostat stuck closed |
-- |
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|
Damaged fins |
Dust contamination or paper clogging |
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|
Physical damage |
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|
Clogged radiator cooling tube |
Excess foreign material (rust, dirt, sand, etc.) |
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|
Reduced air flow |
Cooling fan does not operate |
Fan assembly |
-- |
|
|
High resistance to fan rotation |
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|
Damaged fan blades |
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|
Damaged radiator shroud |
-- |
-- |
-- |
|
|
Improper engine coolant mixture ratio |
-- |
-- |
-- |
|
|
Poor engine coolant quality |
-- |
Engine coolant density |
-- |
|
|
Insufficient engine coolant |
Engine coolant leakage |
Cooling hose |
Loose clamp |
|
|
Cracked hose |
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|
Water pump |
Poor sealing |
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|
Radiator cap |
Loose |
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|
Poor sealing |
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|
Radiator |
O-ring for damage, deterioration or improper fitting |
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|
Cracked radiator tank |
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|
Cracked radiator core |
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|
Reservoir tank |
Cracked reservoir tank |
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|
Overflowing reservoir tank |
Exhaust gas leakage into cooling system |
Cylinder head deterioration |
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|
Cylinder head gasket deterioration |
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|
Except cooling system parts malfunction |
-- |
Overload on engine |
Abusive driving |
High engine RPM under no load |
|
Driving in low gear for extended time |
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|
Driving at extremely high speed |
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|
Powertrain system malfunction |
-- |
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|
Installed improper size wheels and tires |
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|
Dragging brakes |
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|
Improper ignition timing |
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|
Blocked or restricted air flow |
Blocked bumper |
-- |
-- |
|
|
Blocked radiator grille |
Installed car brassiere |
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|
Mud contamination or paper clogging |
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|
Blocked radiator |
-- |
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|
Blocked condenser |
Blocked air flow |
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|
Installed large fog lamp |
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NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.