Which one of the following is suitable reason for engine overheat?

  1. Clogged radiator core
  2. Low idle speed setting
  3. Excessive valve clearance
  4. Too high viscosity of oil

Answer (Detailed Solution Below)

Option 1 : Clogged radiator core
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Detailed Solution

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Following are the causes and remedies for engine overeat

Causes

Remedies

Excessive carbon deposit in engine

Decarbonise

Loose or broken fan belt

Adjust or replace

Not enough coolant

Clean or top up coolant

Lack of lubrication

Top up engine oil

Erratically working thermostat

Replace

Radiator cores tubes clogged

Repair or Replace

Poor water pump performance

Repair or Replace

Wrong injection timing

Set proper timing

Leaky radiator core tube

Repair

Chocked silencer

Clean

Closed radiator shutter

Open

Closed radiator fuel

Straighten the fuel

Clogged oil filter

Replace

Poor performance of oil pump

Repair or Replace

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