Ford Mustang Engine Timing Set Guide for 1964-1974 Models

Understanding Your Mustang's Timing Set

The timing set is the heart of your Mustang's valvetrain, connecting the rotation of the bottom end of the engine (crankshaft) to the top end (camshaft). This keeps your valves and pistons from colliding and ensures your engine runs smoothly. For 1964-1974 Mustangs, which came with engines like the inline-six, 289, 302, and 351W, the original timing sets had a known weakness: a camshaft sprocket with nylon-coated teeth. This was designed to make the engine quieter, but with age, the nylon becomes brittle, breaks off, and can lead to a jumped or broken chain. The broken nylon pieces can also clog the oil pump pickup screen, starving the engine of oil.

Signs of a Failing Timing Set

A worn or failing timing set will give you some warning signs. Ignoring them can lead to catastrophic engine failure.

• Rattling Noise: A loose or stretched chain will often make a rattling sound from the front of the engine, especially on startup or at idle.
• Engine Misfires or Rough Idle: If the chain stretches or jumps a tooth on the sprocket, it throws off the engine's timing, leading to poor performance, rough running, and misfires.
• Metal Shavings in Oil: As the chain and gears wear, small metal particles can flake off and end up in the oil pan. This is a sure sign of internal wear and can be spotted during an oil change.
• Engine Won't Start: In a worst-case scenario, a broken chain means the camshaft no longer turns, and the engine will not start.

Choosing the Right Aftermarket Timing Set

For a 1964-1974 Mustang, you have several excellent aftermarket options that are superior to the original equipment. The key is to match the set to your specific engine (e.g., 200ci Six, 289, 302, 351W) and your intended use.

Brand & Quality Tiers

Not all timing sets are created equal. Here’s a breakdown of the brands available and where they generally stand in terms of quality for your classic Mustang:

• Premium Performance (Ford Performance, Edelbrock, Melling Select): These brands offer high-strength timing sets, often of the double-roller design. They are built for durability and high-performance applications. Sets from Ford Performance and Edelbrock may include features like multi-index crank sprockets, allowing for precise timing adjustments. These are ideal for modified engines or for owners who want the best possible reliability.
• Quality OEM Replacement (Cloyes, Melling): Cloyes and Melling are highly respected manufacturers of stock replacement and performance engine components. A standard replacement set from these brands will be a significant upgrade over the original nylon gear. They offer excellent durability for daily drivers and mild performance builds. Some forum users note that many brands may even be manufactured by Cloyes.
🎬 Watch a side-by-side comparison of Cloyes and Melling timing sets.
• Standard Replacement (INA, other value brands): These brands provide functional, budget-friendly options. While they meet basic requirements, for a critical part like a timing set on a classic V8, investing in a more established brand like Cloyes or Melling is often recommended for long-term peace of mind.
🎬 See more details on the differences between Cloyes and Melling.

Frequently Asked Questions (FAQ)

Do I need a single or double roller timing chain?

A double roller chain is stronger and offers more stability, making it ideal for performance engines or anyone seeking maximum durability. For a stock or mildly modified engine, a quality single-row, all-metal set from a brand like Melling or Cloyes is a perfectly adequate and reliable upgrade over the original nylon gear.

Are there any recalls for 1964-1974 Mustang timing sets?

No, there are no active recalls or modern Technical Service Bulletins (TSBs) from the NHTSA for timing sets on these classic models. The primary known issue is the failure of the original nylon-coated camshaft gear, which is a well-documented problem within the classic car community.

Do I need to replace anything else when I replace the timing set?

Yes. While you have the timing cover off, it is highly recommended to replace the timing cover gasket, front crankshaft seal, and water pump gaskets. It's also a good time to inspect the water pump and timing cover for corrosion or damage.

What is a multi-index crank sprocket?

Some performance timing sets come with a crankshaft sprocket that has multiple keyways. This allows you to install the camshaft slightly advanced or retarded relative to the crankshaft. Advancing or retarding cam timing can shift the engine's power band to a higher or lower RPM range, a feature typically used in performance engine tuning.

Is it important to get the right set for my specific engine?

Absolutely. While many small block Ford V8s share parts, there can be differences. For example, early 260/289 engines used a different camshaft sprocket than later models. Always verify that the timing set you are buying is correct for your specific engine displacement and year.