Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU2014IMPREZA SPORT LIMITEDREPAIR AND DIAGNOSISENGINE MECHANICALCOOLING SYSTEM (MECHANICAL)ENGINE COOLING SYSTEMENGINE COOLING SYSTEM TROUBLESHOOTINGINSPECTION
2014 Subaru Impreza Sport Limited
Engine Cooling System Troubleshooting: Inspection
2014 Subaru Impreza Sport LimitedSECTION 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. < Ref. to BASIC DIAGNOSTIC PROCEDURE .> < Ref. to 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. < Ref. to BASIC DIAGNOSTIC PROCEDURE .> < Ref. to 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. |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.