Chrysler Imperial Ignition Contact Set Guide: 1957-1972
Keep your classic Imperial running smoothly by understanding how to choose and replace your ignition points.
- Ignition points are a normal wear item on a 1957-1972 Imperial and require periodic inspection and replacement.
- Symptoms of failure include rough idle, hard starting, misfiring, and loss of power.
- Always replace the condenser at the same time as the points to prevent premature failure.
- Standard Motor Products is the main aftermarket brand available; their 'Blue Streak' line is considered a premium quality option.
Understanding Your Imperial's Ignition Points
For Chrysler Imperial models made between 1957 and 1972, the ignition contact set, or points, is a fundamental part of the ignition system. Unlike modern cars with fully electronic ignitions, your classic Imperial relies on this mechanical switch to time its spark. The points work together with a part called a condenser, which absorbs excess electricity to prevent the points from arcing and burning out prematurely. Because the points have a rubbing block that wears down and electrical contacts that can pit or burn, they are considered a regular maintenance item that needs to be inspected and replaced periodically to ensure reliable performance.
Symptoms of Failing Ignition Points
When your ignition points start to fail, the symptoms can range from minor annoyances to a car that won't start at all. You might notice:
- Rough Idle and Misfiring: Worn or dirty points can cause inconsistent spark timing, leading to a shaky idle or the engine stumbling during acceleration.
- Hard Starting: If the contact surfaces are too pitted or the gap is incorrect, the coil may not get a clean signal to produce a strong spark, making the engine difficult to start.
- Engine Stalls: An engine that starts but dies as soon as you release the key can sometimes be related to the ignition circuit, which includes the points and ballast resistor.
- No-Start Condition: If the points are completely burned out, shorted, or the rubbing block is worn away, they won't be able to trigger the coil at all, leaving you with an engine that cranks but won't fire.
- Loss of Power: As points wear, the dwell time (the period they remain closed) changes, which can lead to a weaker spark at higher RPMs and a noticeable drop in engine performance.
Pro Tip: Points vs. Electronic Conversion
Many owners of classic Mopars debate converting to an electronic ignition. Electronic systems offer reduced maintenance and a more consistent spark. However, the original points system is simple, inexpensive, and can often be diagnosed and fixed on the side of the road with basic tools, which is a major advantage for a classic car.
Choosing the Right Aftermarket Ignition Contact Set
For the 1957-1972 Imperial, new original equipment (OEM) points are no longer available from Chrysler. The market now consists of aftermarket brands and potentially New Old Stock (NOS) parts. Standard Motor Products (SMP) is a primary aftermarket manufacturer for these components.
Brand Quality: Standard Ignition
Standard Motor Products has been a major name in ignition parts for decades. For classic American vehicles, their quality has historically been considered very good. The brand often offers different tiers of quality:
- Standard (Base Grade): These are service replacement parts designed to meet original specifications. They are a cost-effective choice for regular driving and standard tune-ups.
- Standard Blue Streak: This is SMP's premium line. Blue Streak parts are often marketed as exceeding OEM quality, with features like improved materials and design to address known factory weaknesses and extend service life. Forum users with classic cars often seek out older Blue Streak points for their reputation of durability. A modern Blue Streak set for the Imperial is noted as being specifically designed for Mopar vehicles with an updated internal design.
While some classic car enthusiasts feel that the quality of all modern points isn't what it used to be, particularly regarding the durability of the plastic rubbing block, Standard remains a go-to brand. For a balance of quality and reliability, the Blue Streak line is generally recommended if available.
| Part Type | Estimated Price Range | Notes |
|---|---|---|
| New Aftermarket (Standard Ignition) | $16.49 - $34.07 | Price depends on the quality tier (Standard vs. Blue Streak). This is the most common and practical option. |
| New Old Stock (NOS) OEM | $50 - $150+ | Original Mopar parts that were never sold. Can be very expensive and hard to find. Quality can be excellent, but age can sometimes degrade associated parts like condensers. |
| Used OEM | $5 - $20 | Pulled from a non-running vehicle. Condition is a gamble; not recommended unless for temporary emergency use. |
Known Issues & Recalls
There are no official NHTSA recalls or Technical Service Bulletins (TSBs) for the ignition contact set on the 1957-1972 Chrysler Imperial. Vehicles from this era predate the modern digital recall and TSB systems. Any ignition-related recalls you may find for Chrysler are for much newer models with completely different electronic systems.
Frequently Asked Questions (FAQ)
How often do I need to replace my ignition points?
For a daily driver, ignition points were typically checked and adjusted every tune-up, around 5,000 to 10,000 miles, and replaced as needed. For a classic car that is driven less frequently, it's good practice to inspect them annually. The rubbing block wear and the condition of the contacts are the best indicators.
Do I need to replace the condenser with the points?
Yes, it is highly recommended. The condenser is a cheap part that protects the points from premature failure. A failing condenser will cause the points to arc and burn out very quickly. Always replace them as a set.
What tools do I need to change my ignition points?
You will need basic hand tools like a screwdriver and wrenches. To set the points correctly, you will also need a feeler gauge to set the gap or, for more accuracy, a dwell meter to set the dwell angle. Don't forget a small amount of distributor cam lubricant for the rubbing block.
What is the difference between setting the 'gap' and 'dwell'?
The 'gap' is the physical distance between the point contacts when they are fully open. 'Dwell' is the amount of time, measured in degrees of distributor rotation, that the points remain closed. Setting the dwell with a meter is more accurate than setting the gap with a feeler gauge, as it compensates for any wear on the rubbing block.
Technical Specifications
This is a single-point ignition contact set for use in the original Chrysler distributor. It is not compatible with dual-point distributors or modern electronic ignition conversions. Fitment may vary based on the specific V8 engine in your Imperial (e.g., 392, 413, 440), so always verify the part number for your exact year and engine.
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.