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a. Insufficient engine coolant
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Replenish engine coolant, inspect for leakage, and repair.
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Repair or replace timing belt tensioner.
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d. Malfunction of thermostat
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e. Malfunction of water pump
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f. Clogged engine coolant passage
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g. Improper ignition timing
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Inspect and repair ignition control system. <Ref. to EN(SOHC)-2, Basic Diagnostic Procedure.> or <Ref. to EN(SOHCw/oOBD)-2, Basic Diagnostic Procedure.> or <Ref. to EN(DOHC TURBO)-2, PROCEDURE, Basic Diagnostic Procedure.>
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h. Clogged or leaking radiator
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Clean or repair, or replace.
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i. Improper engine oil in engine coolant.
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j. Air/fuel mixture ratio too lean
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Inspect and repair fuel injection system. <Ref. to EN(SOHC)-2, Basic Diagnostic Procedure.> or <Ref. to EN(SOHCw/oOBD)-2, Basic Diagnostic Procedure.> or <Ref. to EN(DOHC TURBO)-2, PROCEDURE, Basic Diagnostic Procedure.>
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k. Excessive back pressure in exhaust system
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l. Insufficient clearance between piston and cylinder
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o. Improper transmission oil
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q. Malfunction of electric fan
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Inspect radiator fan relay, engine coolant temperature sensor or radiator motor and replace there.
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a. Atmospheric temperature extremely low
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Partly cover radiator front area.
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a. Loosened or damaged connecting units on hoses
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b. Leakage from water pump
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СЃ Leakage from water pipe
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d. Leakage around cylinder head gasket.
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Retighten cylinder head bolts or replace gasket.
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e. Damaged or cracked cylinder head and crank-case
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f. Damaged or cracked thermostat case
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b. Defective radiator fan
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СЃ Defective water pump bearing
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d. Defective water pump mechanical seal
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