Subaru Forester Engine Cooling System 1999 2000 (18) PDF

1. Engine Cooling System Trouble in General
Trouble Corrective action
Over-heating
a. Insufficient engine coolant
Replenish engine coolant, inspect for leakage, and
repair.
b. Loose timing belt Repair or replace 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.
g. Improper ignition timing
Inspect and repair ignition control system.
<Ref. to 2-7 [T100].> On-Board Diagnostics II System
h. Clogged or leaking radiator Clean or repair, or replace.
i. Improper engine oil in engine coolant Replace engine coolant.
j. Air/fuel mixture ratio too lean
Inspect and repair fuel injection system.
<Ref. to 2-7 [T100].> On-Board Diagnostics II 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. Improper transmission oil Replace.
p. Defective thermostat Replace.
q. Malfunction of electric fan
Inspect radiator fan relay, engine coolant temperature
sensor or radiator motor and replace there.
Over-cooling
a. Atmospheric temperature extremely low Partly cover radiator front area.
b. Defective thermostat Replace.
Engine coolant
leaks.
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.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crank-
case
Repair or replace.
f. Damaged or cracked thermostat case Repair or replace.
g. Leakage from radiator Repair or replace.
Noise
a. Defective drive belt Replace.
b. Defective radiator fan Replace.
c. Defective water pump bearing Replace water pump.
d. Defective water pump mechanical seal Replace water pump.
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2-5 [K100] DIAGNOSTICS
1. Engine Cooling System Trouble in General

Subaru Forester Engine Cooling System 1999 2000 (18) Summary of Content

1. Engine Cooling System Trouble in GeneralTrouble Corrective actionOver-heatinga. Insufficient engine coolantReplenish engine coolant, inspect for leakage, andrepair.b. Loose timing belt Repair or replace 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.g. Improper ignition timingInspect and repair ignition control system.Ref. to 2-7 [T100]. On-Board Diagnostics II Systemh. Clogged or leaking radiator Clean or repair, or replace.i. Improper engine oil in engine coolant Replace engine coolant.j. Air/fuel mixture ratio too leanInspect and repair fuel injection system.Ref. to 2-7 [T100]. On-Board Diagnostics II Systemk. 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. Improper transmission oil Replace.p. Defective thermostat Replace.q. Malfunction of electric fanInspect radiator fan relay, engine coolant temperaturesensor or radiator motor and replace there.Over-coolinga. Atmospheric temperature extremely low Partly cover radiator front area.b. Defective thermostat Replace.Engine coolantleaks.a. Loosened or damaged connecting units onhosesRepair or replace.b. Leakage from water pump Replace.c. Leakage from water pipe Repair or replace.d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.e. Damaged or cracked cylinder head and crank-caseRepair or replace.f. Damaged or cracked thermostat case Repair or replace.g. Leakage from radiator Repair or replace.Noisea. Defective drive belt Replace.b. Defective radiator fan Replace.c. Defective water pump bearing Replace water pump.d. Defective water pump mechanical seal Replace water pump.262-5 [K100] DIAGNOSTICS1. Engine Cooling System Trouble in General