What size is a Dodge drain plug?
There isn’t a single universal size for all Dodge vehicles. Most modern Dodge engines use a 14 mm oil drain plug with M14 x 1.5 threads, but some older models and certain transmissions may use SAE sizes such as 9/16-18. Always verify the exact specification for your specific engine and year by checking the owner's or service manual, or by measuring the existing plug.
This article outlines the typical sizes you’re likely to encounter on Dodge engines, how to confirm the right size for your vehicle, and practical tips to avoid cross-threading or damaged threads during replacement.
Engine oil drain plug sizes
Below are the drain plug sizes you’re most likely to encounter on Dodge engine oil pans. The exact size depends on the engine code, year, and market, so use this as a guide and verify with your manual or part number when possible.
- M14 x 1.5 thread (14 mm diameter, 1.5 mm pitch). This is the most common size on modern Dodge engines, including many 3.6L Pentastar and Hemi variants.
- 9/16" - 18 UNF (approximately 0.5625 inches in diameter). Some older Dodge models or non-standard applications may use this SAE size.
Conclusion: The prevailing standard for contemporary Dodges is the 14 mm M14 x 1.5 drain plug, but older or specialty models can use a SAE size such as 9/16-18. Always confirm with the exact vehicle specification to ensure a proper fit and seal.
How to confirm the exact size for your Dodge
To avoid guessing and potential damage, follow these steps to determine the precise drain plug size for your vehicle.
- Check the owner’s manual or service manual for your exact model/year and engine code to locate the drain plug specification.
- Inspect the current drain plug: measure the thread diameter with calipers and note the thread pitch, or compare the plug to known gauges at an auto parts store.
- If you can’t determine the size visually, bring the plug or the oil pan drain plug to a parts counter; staff can help match it to the correct size or cross-reference a Mopar part number.
- When in doubt, contact a Dodge dealer’s service department with your VIN to obtain the exact drain plug specification for your engine.
Conclusion: Accurate verification—via manual, component measurement, or dealer confirmation—helps ensure you use the right plug size and torque specification, protecting the oil system from leaks or damage.
Summary
In short, most contemporary Dodge vehicles use a 14 mm oil drain plug with M14 x 1.5 threads, but some older models may use 9/16-18 SAE threads. Because plug size varies by engine and year, always confirm with the owner’s or service manual or by comparing the existing plug to a matching part. Proper sizing, torque, and sealing are essential to maintain oil pressure and prevent leaks.
