What is the torque on C-Max spark plugs?
The spark plugs for the Ford C-Max’s 2.0-liter Atkinson-cycle hybrid are tightened to about 18 N·m (13 ft-lb). Exact torque can vary by engine variant and spark plug type, so always confirm with the official service manual or Ford’s technical documentation for your VIN.
Engine configurations and official torque values
The C-Max lineup centers on a 2.0-liter Atkinson-cycle hybrid powertrain in its North American model, with variations in other markets. The spark plug torque recommended by Ford generally targets the same range for this engine, but exact figures can differ by plug design and model year. The entry below reflects the most common specification for the C-Max Hybrid’s 2.0L engine.
- 2.0-liter Atkinson-cycle Hybrid engine: Spark plugs tightened to 18 N·m (13 ft-lb). Some service procedures may indicate a final 90-degree turn after reaching base torque, depending on plug design and fastener sequence. Always follow the manual for your exact plug type.
Torque can vary slightly by plug design (e.g., iridium vs. copper) and by model year, so verify with the Ford workshop manual or dealer for any updates or VIN-specific instructions.
Installation considerations and best practices
Before addressing the installation steps, here is a concise guide to the considerations that influence how you approach spark plug replacement on a C-Max.
- Always use the spark plug type specified by Ford for your engine (iridium or platinum as recommended). Using the wrong type can affect performance and may require different torque.
- Check the threads and cylinder head bore for damage or wear before installation; cross-threading can ruin the head and is not reversible by torque alone.
- Follow the manufacturer's guidance on anti-seize and lubrication; many modern Ford manuals discourage applying anti-seize on spark plug threads unless explicitly instructed.
- Apply torque gradually with a calibrated torque wrench, and if a final tightening step is specified (such as a 90-degree turn after base torque), complete it after the base torque is reached.
Bottom line: For the C-Max Hybrid's 2.0L engine, torque around 18 N·m (13 ft-lb) is the standard, but always consult the official service manual to account for plug type, engine variant, and year.
Summary
The spark plug torque specification for Ford C-Max models is typically around 18 N·m (13 ft-lb) for the common 2.0-liter Atkinson-cycle hybrid engine, with variations by plug type and model year. Always verify with Ford's official service documentation or your dealer to ensure the correct torque for your specific vehicle, and use a calibrated torque wrench to achieve the specification accurately. Proper torque helps prevent thread damage and ensures a proper seal for combustion pressures.
