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Subaru Crosstrek Service Manual: Engine cooling system trouble in general Inspection

Subaru Crosstrek Service Manual / Cooling(h4do) / Engine cooling system trouble in general Inspection

COOLING(H4DO) > Engine Cooling System Trouble in General

INSPECTION

Trouble

Possible cause

Corrective action

Over-heating

a. Insufficient engine coolant

Replenish engine coolant, inspect for leakage, and repair it if necessary.

b. Defective thermostat

Replace.

c. Malfunction of water pump

Replace.

d. Clogged engine coolant passage

Clean.

e. Improper ignition timing

Inspect and repair ignition control system. Basic Diagnostic Procedure">

f. Clogged or leaking radiator

Clean, repair or replace.

g. Defective radiator cap

Replace.

h. Improper engine oil in engine coolant

Replace the engine coolant. If ineffective, check, repair or replace engine components.

i. Air/fuel mixture ratio too lean

Inspect and repair the fuel injection system. Basic Diagnostic Procedure">

j. Excessive back pressure in exhaust system

Clean or replace.

k. Insufficient clearance between piston and cylinder

Adjust or replace.

l. Slipping clutch

Repair or replace.

m. Dragging brake

Adjust.

n. Malfunction of radiator fan

Inspect the radiator fan relay, engine coolant temperature sensor or fan motor and replace them.

Over-cooling

a. Ambient 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 cylinder head gasket.

e. Damaged or cracked cylinder head and cylinder block

Repair or replace.

f. Damaged or cracked thermostat cover

Repair or replace.

g. Leakage from radiator

Repair or replace.

Noise

a. Defective radiator fan

Replace.

b. Defective water pump bearing

Replace water pump.

c. Defective water pump mechanical seal

Replace water pump.

Installation
COOLING(H4DO) > Water PumpINSTALLATION1. WATER PUMP PULLEY1. Using the ST, install the water pump pulley.ST1 18355AA000PULLEY WRENCHST2 18334AA030PULLEY WRENCH PIN SETTightening torque:14 N&m ...

Radiator cap Inspection
COOLING(H4DO) > Radiator CapINSPECTION1. Check that the radiator cap does not have deformation, cracks or damage.2. Attach the radiator cap tester to radiator cap.3. Increase pressure until the rad ...

Other materials:

Dtc p0131 a/f / o2 sensor circuit low voltage bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0131 A/F / O2 SENSOR CIRCUIT LOW VOLTAGE BANK 1 SENSOR 1DTC detecting condition:Immediately at fault recognitionCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode ...

Assembly
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Main Shaft AssemblyASSEMBLY1. When the sleeve & hub assemblies have been disassembled, reassemble by aligning the alignment marks.NOTE:Position the open ends of the spring 120° apart.(A)3rd-4th coupling sleeve & synchronizer hub ASSY( ...

Installation
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Transmission CaseINSTALLATION1. Wipe off grease, oil and dust on the mating surfaces of transmission cases with cleaning solvent.2. Install the reverse idler gear. Reverse Idler Gear > INSTALLATION">3. Install the shifter fork and rod. Shif ...

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