The spark plug gap for most 2015 Dodge Dart models is 0.040 inches (1.0 mm). This typically applies to the common 2.4-liter Tigershark engine used in many 2015 Darts, but you should verify the exact specification for your engine variant and plug type in the owner’s manual or on the spark plug packaging.
Engine variants and gap specifications
Here is the main gap specification you’ll encounter for the 2015 Dart’s common engines. If your Dart uses a different engine variant or aftermarket plugs, double-check the exact spec from the OEM data.
- 2.4L Tigershark I4: spark plug gap 0.040 in (1.0 mm).
Note: Some engines or plug choices may have different recommended gaps. Always consult the official service data for your exact engine code and plug type before installation.
How to verify and set the gap
To ensure proper ignition and performance, follow these steps:
- Disconnect the ignition coil or unhook the spark plug boot to access the plug.
- Remove the spark plug and inspect its condition; replace if worn or damaged.
- Measure and adjust the gap with a feeler gauge to 0.040 inches (1.0 mm) if required by your engine variant.
- Reinstall the plug and tighten to the factory torque specification for that plug and engine variant.
- Repeat for all plugs if replacing multiple plugs.
After installation, start the engine and listen for a smooth idle and proper acceleration. If misfires or rough running occur, recheck the gap and plug type or ignition components.
Best practices and considerations
Practical tips to avoid common mistakes when replacing spark plugs on a 2015 Dodge Dart:
- Use correctly gapped plugs that match the engine variant and the plug manufacturer’s spec.
- Always install a like-for-like plug type (heat range, thread size, and reach) when replacing all plugs.
- Keep a note of the gap setting on the new plugs for future maintenance checks.
Following these best practices helps ensure reliable ignition, optimal fuel economy, and smooth engine operation.
Summary
The standard spark plug gap for a 2015 Dodge Dart is 0.040 inches (1.0 mm) for the common 2.4L engine. Verify with your specific engine variant and plug type from the owner’s manual or manufacturer data before installation.