Dodge W100 Engine Timing Set Replacement Guide (1975-1989)
Keep your classic Dodge truck's engine in sync and running strong with the right timing set.
- Always replace an original nylon-toothed cam gear with an all-metal timing set for long-term reliability.
- Verify your specific engine (225 Slant-6, 318 V8, 360 V8) before ordering, as the parts are not interchangeable.
- For stock applications, a standard set from Melling or Cloyes is an excellent choice; for modified engines, consider a double-roller set from Edelbrock or Melling Select.
- It is highly recommended to replace the water pump, timing cover gasket, and front crank seal at the same time.
Is Your W100's Timing Chain on Borrowed Time?
For 1975-1989 Dodge W100 trucks, the engine timing set isn't a part that fails suddenly without warning. These classic pushrod engines, including the dependable 225 Slant-6 and the robust 318 and 360 V8s, use a timing chain. Over many miles and decades, this chain stretches, and the gear teeth wear down. A common issue on older Mopar engines was the use of a camshaft sprocket with nylon-coated teeth to reduce noise. With age, heat, and oil exposure, this nylon becomes brittle, breaks off, and can clog the oil pump pickup screen, leading to serious oil pressure problems.
Pro Tip: When replacing your timing set, always choose an all-metal replacement set with steel or iron gears. The slight increase in noise is insignificant compared to the massive improvement in durability and reliability.
Choosing the Right Aftermarket Timing Set
Since OEM parts for these trucks are largely unavailable, the aftermarket is your go-to source. The quality can vary, so it's important to choose a reputable brand. Your choice depends on your truck's use.
- Standard Replacement (Melling, Cloyes): For a daily driver or stock restoration, brands like Melling and Cloyes offer excellent quality. They are well-regarded for providing reliable, OEM-equivalent parts. These are simple, durable, and affordable options that will restore original engine performance.
- Heavy-Duty / Performance (Edelbrock, Melling Select, Cloyes Race): If you use your W100 for heavy towing, hauling, or have a modified engine, consider a performance set. Brands like Edelbrock offer double-roller chains and billet steel sprockets. These are stronger, reduce chain stretch, and often include multiple keyways on the crank sprocket. This allows for advancing or retarding camshaft timing, a feature useful for performance engine building.
Match the Part to Your Engine!
The most common mistake is ordering a timing set for the wrong engine. The 1975-1989 W100 came with several options, most commonly the 225 Slant-6, 318 V8, and 360 V8. A set for a Slant-6 will not fit a V8, and vice-versa. Always verify your truck's specific engine before ordering.
Aftermarket Timing Set Cost for 1975-1989 Dodge W100
| Quality Tier | Price Range | Brands | Best For |
|---|---|---|---|
| Standard Replacement | $30 - $70 | Cloyes, Melling, INA | Stock trucks, daily driving, general restoration. |
| Heavy-Duty / Performance | $75 - $190 | Edelbrock, Melling Select Performance, Cloyes Race | Modified engines, heavy towing/hauling, performance builds. |
Frequently Asked Questions (FAQ)
Do I need a single or double roller timing chain?
For a stock engine, a standard single roller or "silent" type chain is perfectly adequate, especially an all-metal set. A double roller chain is stronger and recommended for high-performance or heavy-duty applications where the engine is under more stress. Check for clearance, as some double roller chains may require modifications to the timing cover.
Are there any recalls on the timing set for my W100?
No, there are no specific recalls or Technical Service Bulletins (TSBs) from the NHTSA related to the timing chain on the 1975-1989 Dodge W100. Any issues today are due to normal wear and tear on a 35+ year old vehicle.
Should I replace the water pump and other parts at the same time?
Yes, it is highly recommended. The timing chain replacement requires removing the water pump and timing cover. This is the perfect time to replace the water pump, timing cover gasket, front crankshaft seal, and any coolant bypass hoses. This saves you from having to do the same labor twice if one of those parts fails soon after.
What are the alignment dots on the gears for?
The dots on the camshaft and crankshaft sprockets are for alignment. During installation, you must rotate the engine so the dots on the two gears are aligned correctly (typically, with the crank gear dot at the top and the cam gear dot at the bottom, pointing at each other). This ensures the valve timing is correct. Failure to align these marks properly will result in a no-start condition or severe engine damage.
Technical Specifications
Vehicle application is determined by engine type: Chrysler 225 ci Slant-6, Chrysler LA-series 318 ci V8, or Chrysler LA-series 360 ci V8. Sets consist of a crankshaft sprocket, a camshaft sprocket, and a timing chain.
We Have This Part in Stock
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.