Engine Timing Set Guide for 1959-1967 Dodge W300 Pickup
Keep your classic Dodge W300's engine running strong by understanding its timing set needs.
- You must verify your specific engine (e.g., Slant-6, 318 Poly, 318 LA) before ordering a timing set, as they are not interchangeable.
- A rattling noise from the front of the engine is a common symptom of a worn timing chain.
- Modern all-metal aftermarket timing sets are a significant durability upgrade over original V8 sets that used nylon-toothed gears.
- It is highly recommended to replace the water pump, timing cover gasket, and front crankshaft seal at the same time as the timing set.
Is Your Engine Making a Rattling Noise?
A rattling or clattering sound from the front of the engine, especially at idle, is a classic sign of a worn timing chain. As the chain stretches over many years and miles, it can slap against the inside of the timing cover. Other signs of a failing timing set include a loss of engine power, backfiring, or an engine that cranks but won't start. In severe cases, you might find small metal shavings in the engine oil during an oil change, which can be pieces of a disintegrating gear or chain.
A Worn Timing Set is a Serious Problem
Do not ignore symptoms of a bad timing set. If the chain stretches too much, it can "jump a tooth" on the gears. This will throw your engine's timing way off, causing it to run very poorly or not at all. If the chain breaks, the valves can hit the pistons, leading to catastrophic engine damage that is very expensive to repair.
Choosing the Right Aftermarket Timing Set
For a vintage truck like the 1959-1967 W300, original "OEM" parts are no longer made. Fortunately, modern aftermarket parts are not only available but are often better than the originals. The most important step is to correctly identify your engine, as the timing set is engine-specific. During this period, W300s were available with several engines, most commonly:
- Slant-6 Engines (e.g., 225 ci): These engines use a timing chain and gear set.
- V8 Engines (e.g., 318 Poly, 318 LA, 383): These also use a timing chain and gears.
A well-known issue with some original Mopar V8 engines from this era was the use of a camshaft gear that had nylon-coated teeth. Over time, the nylon becomes brittle, cracks, and breaks off, causing excessive slack in the timing chain. Modern aftermarket timing sets, like those from Cloyes, use all-metal gears (often billet steel), which is a significant durability upgrade. For most owners, a quality stock replacement or heavy-duty set from a reputable brand like Cloyes is an excellent choice that will last for many years.
Pro Tip: What Else to Replace
Since replacing the timing set requires removing the timing cover, it is the perfect time to also replace the timing cover gasket, the front crankshaft seal, and the water pump. These parts are all in the same area and require much of the same labor to access. Replacing them all at once saves you time and money in the long run.
Cost to Replace a Dodge W300 Timing Set
The total cost will depend on the parts you choose and the labor rates in your area. Below are some general estimates.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Timing Set | $65 - $168 |
| Shop Labor | $400 - $750 |
| Total Estimated Cost | $465 - $918 |
(Cost estimates are for parts and labor and do not include related parts like water pumps or seals.)
Frequently Asked Questions (FAQ)
Is an aftermarket timing set better than the original?
Yes. For many V8 engines of this era, original timing sets used nylon-toothed cam gears that wear out. Modern aftermarket sets from brands like Cloyes use all-steel construction, which is much more durable and considered a worthwhile upgrade.
How do I know which engine my W300 has?
You can often identify your engine by looking for casting numbers on the engine block or by the shape of the valve covers. The Slant-6 engine is easy to spot as it is physically tilted to one side. For V8s, consulting a Mopar enthusiast forum or a vehicle-specific guide can help you decode the visual differences between a 318 Poly, 318 LA, or other V8s.
Should I replace the water pump at the same time?
Absolutely. The water pump must be removed to access the timing cover. Replacing it while you are already there is a smart move. It adds very little to the total labor cost and prevents you from having to do the same job twice if the old water pump fails later.
Can I replace the timing set myself?
This is a moderately difficult job that can be done by an experienced home mechanic. It requires draining the cooling system, removing the radiator, belts, pulleys, harmonic balancer, and water pump to get the timing cover off. Special tools, like a harmonic balancer puller, are required. If you are not comfortable with this level of disassembly, it is best to leave it to a professional mechanic.
Technical Specifications
The key specification is matching the timing set to your truck's specific engine. Engines available in the 1959-1967 W300 include the 225 Slant-6, 318 Poly V8, 318 LA V8, and 383 V8. Each requires a different timing set.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.