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What size is the oil plug on a Chevy 350?

The oil plug on a Chevy 350 engine is typically a 3/4-inch or 19-millimeter size. This is the standard size for the oil drain plug on most Chevrolet V8 engines, including the popular 350 cubic inch (5.7-liter) small-block engine.


Detailed Explanation


The Chevrolet 350 engine is one of the most widely used and well-known V8 engines in automotive history. Introduced in 1967, the 350 has been used in a variety of Chevrolet and GMC vehicles over the decades, from Corvettes and Camaros to pickup trucks and SUVs.


When it comes to changing the oil on a Chevy 350 engine, the size of the oil drain plug is an important detail to know. The oil plug is located at the bottom of the oil pan and must be removed to allow the old oil to drain out before refilling with fresh oil and a new filter.


Standard Oil Plug Size


The standard oil plug size for a Chevy 350 engine is 3/4-inch or 19 millimeters. This is a common size used across many Chevrolet V8 engines, not just the 350. The 3/4-inch or 19mm size allows for a secure, leak-proof seal when the plug is tightened back into the oil pan.


It's important to use the correct size oil plug to avoid stripping the threads in the oil pan or having the plug become loose and cause an oil leak. Using the wrong size plug can also make it difficult to remove the plug during future oil changes.


Checking the Oil Plug Size



  • Visually inspect the oil plug on your Chevy 350 engine to confirm the size.

  • Measure the diameter of the plug using a ruler or caliper to verify it is 3/4-inch or 19mm.

  • Consult your vehicle's owner's manual or service information to confirm the recommended oil plug size.


Knowing the correct oil plug size is an important detail when performing routine maintenance on your Chevy 350 engine. Using the right size plug will help ensure a proper seal and prevent any oil leaks or other issues.

What size is the oil plug socket?


What size wrench to use for an oil drain plug depends on the size of the oil drain plug itself, which is a long bolt head. There is no universal oil plug size, but they do come in just a few several standard sizes, such as ¼ inch (. 6 centimeters), 3/8 inch (. 9 centimeters), ½ inch (1.3 centimeters), etc.



What is the size of standard plug?


Type A (NEMA 1-15) Plugs
Type A electrical plugs are ungrounded and feature two flat parallel prongs. They have a current rating of 15A and a voltage rating of 125V. The prong length ranges from 15.9 to 18.3 mm, with a spacing of 12.7 mm between the prongs.



How much oil does 350 small block take?


You'll also need to change your oil filter, and the recommended brands are Delco and Fram, as they bear SAE (Society of American Engineers) approval. In case you're wondering how much oil your Chevy 350 will drink for a change, it's around five quarts for an unmodified engine.



What size is the drain plug on an F350?


Manufacturer‎Votex
Product Dimensions3 x 3 x 1 inches
Country of Origin‎USA
Item model number‎DP001-FORD-54
Manufacturer Part Number‎DP001-FORD-54



What size is the drain plug on a Chevy oil pan?


Dorman – Standard Engine Oil Drain Plug: M12x1. 75 Thread, 15 mm Head, 1 Pack (Part No. 090-175CD)



What size are the oil pan bolts on a 350 Chevy?


Thread Size1/4 inches 20
Item Diameter0.25 Inches
Compatible groove diameter0.25 Inches
Number of Pieces22



What size socket do I need to remove the oil?


Place a 3/8-inch (0.9 centimeters) socket in the socket wrench, fit it over the drain plug's nut and turn it counterclockwise. The oil drain plug should open easily, draining the used oil from the engine. Make sure to place a bucket and some newspaper under the car's engine to catch all the draining oil.



What size is the oil drain plug on a Chevy 350?


CHEVROLET 5.7L/350 Oil Pan Drain Plugs - M12 x 1.75 Thread Size - Free Shipping on Orders Over $109 at Summit Racing.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.