What size bolts hold a starter on 1989 Ford F-250?

There's no single answer to what size bolts hold a starter on a 1989 Ford F-250. The size depends on the engine. A 4.9L inline-six will likely have different-sized bolts than a 5.0L V8, 5.8L V8, or 7.3L diesel.

To find the correct bolt size, you need to:

1. Identify your engine: Check your vehicle's documentation or the engine block itself for the engine code.

2. Consult a repair manual: A repair manual specific to your year and engine will show diagrams and specifications, including the starter bolt size(s). Haynes and Chilton manuals are readily available.

3. Check a parts store online: Websites like AutoZone, Advance Auto Parts, or Napa Auto Parts allow you to search for parts based on your vehicle's year, make, model, and engine. The parts diagrams often show bolt sizes.

Without knowing your engine, I cannot provide the correct bolt size. Attempting to use the wrong size bolt could damage the starter or the engine block. It's crucial to get the correct information before attempting this repair.