What size bolts on starters for Chevy 350?

There's no single answer to the bolt size for a Chevy 350 starter. The size varies depending on the year, the specific starter (manufacturer and model), and even sometimes the specific engine application (e.g., truck vs. car).

You must identify the starter itself to determine the correct bolt size. Look for markings on the starter housing or the packaging if it's a new unit.

To find the correct information, you should:

1. Visually inspect the bolts: If you have the starter removed, measure the existing bolts with calipers or a ruler. Note the diameter and thread pitch (e.g., 5/16"-18).

2. Check the starter's part number: Use the part number (usually stamped on the starter housing) to look up the specifications online through a parts supplier like AutoZone, Advance Auto Parts, Napa Auto Parts, etc. Their online catalogs often list specifications.

3. Consult a repair manual: A Haynes or Chilton repair manual specific to your vehicle's year and model will list the correct bolt size(s).

4. Go to a parts store: Take your old starter (or at least the mounting area of the block) to an auto parts store. They can identify the correct bolts for you.

Don't guess! Using the wrong size bolt can damage the starter, the engine block, or even cause injury. Always use the correct hardware.