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.
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HOMESERVICE MANUALSFORD2010FOCUS S, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1433 (ENGINE COOLING SYSTEM)GENERAL PROCEDURESHEATER CORE BACKFLUSHING
2010 Ford Focus S, Standard
Heater Core Backflushing
2010 Ford Focus S, StandardSECTION Heater Core Backflushing
WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Material
| Item | Specification |
|---|---|
| Premium Cooling System Flush VC-1 |
ESR-M14P7-A |
- Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding .
- Use an appropriate cooling system flusher to backflush the heater core. Use Premium Cooling System Flush VC-1 meeting Ford specification ESR-M14P7-A. Flush with water thoroughly after using VC-1 or equivalent prior to refilling the cooling system.
- Fill the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding .
WARNING:
Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.
NOTE:
For additional information, refer to the cooling system flusher manufacturer's operating instructions for particular vehicle hook-up.
RENDER: 1.0x
NO RELATED
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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.