Here's how to find the casting number:
1. Locate the Engine Block: The engine block is the main part of the engine, typically made of cast iron.
2. Find the Casting Number: The casting number is usually a series of numbers and sometimes letters, stamped into a relatively flat area of the engine block. Common locations include:
* Top of the engine block, near the front: Often near the distributor or the valve covers.
* Side of the engine block: Look towards the passenger side (right side when facing the front of the vehicle).
* Bottom of the engine block: This is less common but possible.
3. Clean the Area: Dirt, grime, and oil can obscure the casting number. Use a wire brush or a degreaser to clean the area before trying to read it.
4. Record the Number: Once you've found it, carefully write down the entire casting number.
5. Look up the Number: Once you have the casting number, you can use online resources like Ford parts websites or forums dedicated to Ford vehicles (like Bronco forums) to cross-reference the number and determine the exact engine type and specifications. You can also use a Ford parts catalog.
Important Note: Because a Cleveland is highly improbable in a 1991 Bronco, the process of elimination based on your findings will likely confirm it's a Windsor. If you can't find a casting number or are unsure about the identification, providing the number you found (if any) to a Ford parts expert or online forum will help confirm your engine type.
