Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Cooling Engine Cooling System Trouble in General

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                    ENGINE COOLING SYSTEM TROUBLE IN GENERAL
COOLING

12.Engine Cooling System Trouble in General
A: INSPECTION
   Trouble                          Possible cause                                          Corrective action
                                                                       Replenish the engine coolant, inspect for leakage, and
                 a. Insufficient engine coolant
                                                                       repair.
                 b. Loose timing belt                                  Repair or replace the timing belt tensioner.
                 c. Oil on drive belt                                  Replace.
                 d. Malfunction of thermostat                          Replace.
                 e. Malfunction of water pump                          Replace.
                 f. Clogged engine coolant passage                     Clean.
                                                                       Inspect and repair the ignition control system. 
                 h. Clogged or leaking radiator                        Clean or repair, or replace.
Over-heating
                 i. Improper engine oil in engine coolant              Replace the engine coolant.
                                                                       Inspect and repair the fuel injection system. 
                 k. Excessive back pressure in exhaust system          Clean or replace.
                 l. Insufficient clearance between piston and cylinder Adjust or replace.
                 m. Slipping clutch                                    Repair or replace.
                 n. Dragging brake                                     Adjust.
                 o. Defective thermostat                               Replace.
                                                                       Inspect the radiator fan relay, engine coolant tempera-
                 p. Malfunction of radiator fan
                                                                       ture sensor or radiator motor and replace there.
                 a. Atmospheric temperature extremely low              Partly cover the radiator front area.
Over-cooling
                 b. Defective thermostat                               Replace.
                 a. Loosened or damaged connecting units on hoses Repair or replace.
                 b. Leakage from water pump                            Replace.
                 c. Leakage from water pipe                            Repair or replace.
Engine coolant
                 d. Leakage around cylinder head gasket                Retighten the cylinder head bolts or replace gasket.
leaks
                 e. Damaged or cracked cylinder head and crankcase Repair or replace.
                 f. Damaged or cracked thermostat case                 Repair or replace.
                 g. Leakage from radiator                              Repair or replace.
                 a. Defective drive belt                               Replace.
                 b. Defective radiator fan                             Replace.
Noise
                 c. Defective water pump bearing                       Replace the water pump.
                 d. Defective water pump mechanical seal               Replace the water pump.




                                                     CO(H4SO)-42

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