Chrysler Imperial Engine Timing Set Guide for 1977-1984 Models
Everything you need to know about replacing the timing set on your 1981-1983 Imperial's 5.2L V8 engine.
- The 1981-1983 Imperial uses a 5.2L (318) V8 with a timing chain.
- Factory nylon cam gears are a known failure point; upgrade to an all-steel set.
- A standard replacement from Cloyes or Melling is a good upgrade; a double-roller offers maximum durability.
- While replacing the timing set, also replace the water pump and front crank seal.
Understanding Your Imperial's Timing Set
The 1981-1983 Chrysler Imperial was equipped with the dependable 5.2L (318) V8 engine. A key component of this engine is the timing chain. From the factory, many of these engines used a timing gear on the camshaft that had nylon-coated teeth. Over many years and miles, this nylon can become brittle, break off, and fall into the oil pan. This can lead to a stretched or jumped timing chain, causing poor engine performance or even a no-start condition. Upgrading to an all-metal timing set is a common and highly recommended repair.
Symptoms of a Failing Timing Set
A worn timing chain gives several warning signs. The most common is a rattling noise from the front of the engine, especially at startup. You might also notice your engine running rough, backfiring, or having a noticeable loss of power. 🎬 Learn how to check your timing chain in five minutes. Because the timing chain also drives the distributor, a worn chain can cause erratic ignition timing. If the chain has stretched significantly, the engine may be hard to start or not start at all.
Don't Ignore the Signs
While the 5.2L V8 is not an "interference" engine (meaning the pistons won't hit the valves if the chain breaks), a failed timing chain will leave you stranded. Pieces of the old nylon gear can also clog the oil pump pickup screen, starving the engine of oil and leading to catastrophic failure.
Choosing the Right Aftermarket Timing Set
When replacing your timing set, you have several options. For a stock or daily-driven Imperial, a standard replacement, all-steel, single-row timing set is a significant upgrade over the original nylon-toothed gear. For those seeking maximum durability, a double-roller timing chain is a popular choice.
- Standard Replacement (Good): Brands like Melling and Cloyes offer quality, all-steel standard replacement sets. These are affordable and a big improvement over the original design for a stock engine.
- Heavy-Duty / Double-Roller (Better): For added strength and longevity, consider a double-roller timing set from brands like Cloyes or Melling Select Performance. These are considered overkill for a stock engine by some, but provide peace of mind and are a must for any performance modifications.
- Brand Quality: Forum discussions among Mopar enthusiasts show mixed but generally positive opinions on both Cloyes and Melling. Some users have reported issues with excessive slack in new Cloyes sets, while others have used them for years without problems. Melling is often praised for its consistent quality. 🎬 Watch a detailed comparison between Cloyes and Melling timing sets. Ultimately, either brand's all-metal set will be a major improvement.
Pro Tip: While You're In There
Replacing the timing set requires removing the timing cover. This is the perfect time to also replace the timing cover gasket, the front crankshaft seal, and the water pump to save on future labor.
Estimated Costs for Timing Set Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Timing Set | $31 - $168 |
| Shop Labor | $450 - $700 |
| Total Job Cost (Parts + Labor) | $481 - $868 |
Cost estimates are approximate and can vary based on your location and the specific repair shop.
Frequently Asked Questions
Do I need a single or double-roller timing chain?
For a stock 5.2L V8, a quality all-steel single-row set is perfectly adequate and a great upgrade from the factory nylon gear. A double-roller chain offers more strength and durability, which is good for peace of mind or if you plan future engine modifications.
Were there any recalls for the 1981-1983 Imperial timing set?
No, there were no recalls issued by the NHTSA for the timing set on the 1981-1983 Chrysler Imperial. There were, however, significant issues and a recall related to the electronic fuel injection system, which led many cars to be converted to carburetors by dealers.
What is the "oil slinger" and do I need it?
The oil slinger is a thin metal disc that sits behind the harmonic balancer. Its purpose is to shield the front crankshaft seal from being directly splashed with oil. It is sandwiched tightly between the crank gear and the harmonic balancer. If your engine has one, you should reinstall it.
Is this a good DIY project?
Replacing a timing chain is a moderately difficult job. It requires draining the coolant, removing the radiator, water pump, harmonic balancer, and timing cover. You will need a harmonic balancer puller. While it can be done by a skilled DIY mechanic, it can be challenging for a beginner.
🎬 See a step-by-step timing chain installation on a 318 engine.Helpful Videos
Technical Specifications
Engine: 5.2L (318 c.i.) V8. The camshaft uses a single-bolt attachment for the gear.
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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.