Essential Guide to the Engine Timing Set for 1975-1981 Chrysler Newport
Address common timing chain issues in your Newport before they lead to serious engine trouble.
- The original factory timing set with a nylon-coated cam gear is a common failure point and should be replaced.
- A quality, all-metal aftermarket timing set from a brand like Cloyes, Melling, or Edelbrock is a significant reliability upgrade.
- Symptoms of failure include engine rattle, rough running, power loss, and eventually a no-start condition.
- It is highly recommended to also replace the water pump and front engine seals during the timing set replacement.
The Original Sin: Nylon-Coated Cam Gears
Many Chrysler V8 engines of this era, including those in the Newport, left the factory with a significant weak point: a camshaft sprocket with nylon-coated teeth. This was done to reduce engine noise. Over time and with exposure to heat and oil, the nylon becomes brittle, cracks, and breaks off. These broken pieces can clog the oil pump pickup screen, starving the engine of oil. More commonly, the loss of teeth causes the timing chain to become loose, jump a tooth, or break entirely, leading to poor running and potentially catastrophic engine damage. For this reason, replacing the original timing set with a modern, all-metal aftermarket version is not just a repair, but a crucial reliability upgrade.
Choosing Your Aftermarket Timing Set
When shopping for a new timing set for your Newport, you'll find several excellent aftermarket options that are superior to the original factory part. The key is to choose an all-metal set, which eliminates the original nylon gear failure point.
- Standard Replacement (Good): Brands like Cloyes and Melling offer high-quality, standard replacement timing sets. These are often called "silent" or "inverted tooth" chains and are designed to be quiet, durable, direct replacements. They are an excellent choice for a daily driver or stock restoration and are significantly more durable than the original nylon-toothed gear.
- Heavy-Duty / Performance (Best): For those seeking maximum durability or building a modified engine, a double-roller timing chain set from brands like Edelbrock or Melling Select Performance is the top choice. These sets feature two rows of rollers on the chain and sprockets made from hardened or billet steel. This design is incredibly strong, reduces friction, and ensures the most accurate timing possible, though it can produce slightly more noise than a standard chain.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Timing Set | $32 - $168 |
| Shop Labor | $450 - $750 |
| Total Estimated Cost | $482 - $918 |
Pro Tip: While replacing the timing set, you have to remove the water pump and timing cover. This is the perfect time to also replace the water pump, timing cover gasket, and any front-of-engine seals to prevent future leaks and save on labor down the road.
Frequently Asked Questions (FAQ)
Is an aftermarket timing set really better than the original for my Newport?
Yes. For this specific vehicle generation, a quality all-metal aftermarket timing set is a significant upgrade over the factory-installed part with nylon teeth. The original design is a known failure point, and an aftermarket set provides much greater reliability and peace of mind.
What happens if I don't replace a failing timing set?
Ignoring the symptoms of a bad timing chain can have severe consequences. Initially, you'll experience poor engine performance. If the chain jumps a tooth, the engine may run very rough or not at all. If the chain breaks completely, the pistons can collide with the valves in some engines, causing catastrophic and expensive internal damage.
Are there any recalls for the timing set on my 1975-1981 Chrysler Newport?
Searches of the National Highway Traffic Safety Administration (NHTSA) database show no open recalls specifically for the engine timing set on this vehicle. Issues with the original nylon gear are considered a wear-and-tear or design-flaw item that is addressed by normal service, not a safety recall.
Should I get a standard chain or a double-roller chain?
For a stock or lightly modified engine used for normal driving, a standard all-metal replacement set from a brand like Cloyes or Melling is perfectly adequate and a huge improvement over stock. A double-roller set is considered a premium, heavy-duty option that is ideal for high-performance engine builds or if you want the absolute strongest components available.
Technical Specifications
OEM Part Numbers: Note: OEM parts are largely discontinued; numbers are for reference only.
Fits 1975-1981 Chrysler Newport models with V8 engines (e.g., 5.2L/318ci, 5.9L/360ci, 6.6L/400ci). Aftermarket options include standard inverted-tooth (silent type) chains and heavy-duty double-roller chains. Sprockets are typically cast iron for standard sets and steel for performance sets.
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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.