Choosing the Right Distributor for Your 1987 Chevrolet V20
If your classic V20 is misfiring, stalling, or hard to start, a failing distributor could be the culprit.
- Symptoms like stalling when hot, rough idle, and hard starting often point to a failing distributor.
- Often, only the internal cap, rotor, or ignition module needs replacement, not the entire unit.
- When replacing the whole distributor, marking the old one's position is crucial, but a timing light is needed for a proper final adjustment.
- Brand quality varies, with MSD and Accel offering performance upgrades, while brands like Cardone are budget-focused but have mixed reviews.
Is Your V20's Distributor Failing?
A distributor doesn't usually fail suddenly. It gives you warning signs. The internal parts, like the ignition module, pickup coil, cap, and rotor, wear out over time. Heat and moisture are the biggest enemies of these components. If you notice your truck running rough, hesitating when you accelerate, or stalling for no reason, the distributor is a prime suspect. A complete no-start condition can also point to a failed distributor component, such as the ignition module or pickup coil.
Common Failure Points
Often, the entire distributor doesn't need to be replaced. The most common issues are with wearable parts inside it:
- Cap and Rotor: These are maintenance items. Carbon tracking, corrosion on the terminals, or cracks will cause misfires. It's a good idea to replace them every 30,000 miles.
- Ignition Module: This electronic part controls the ignition coil. When it gets old, heat can cause it to fail intermittently, leading to stalling when the engine is hot. It can be tested at most auto parts stores.
- Pickup Coil: This part sends signals to the ignition module. A failing pickup coil can cause a no-spark or intermittent spark condition.
Choosing the Right Aftermarket Distributor
When shopping for a new distributor for your '87 V20, you have options ranging from budget-friendly replacements to high-performance upgrades. Since OEM parts are likely discontinued, the aftermarket is your primary source.
Brand Tiers for Your V20
Performance Brands (MSD, Accel, FAST, Pertronix):
These brands are for owners looking to upgrade. They often feature billet aluminum housings, more stable timing, and higher-quality components designed for performance and reliability. MSD is a well-regarded name in the performance world, but can be more expensive. Accel and Pertronix offer solid performance options as well, though some forum users report mixed experiences. These are a good choice if you have a modified engine or simply want the best spark delivery possible.
Standard Replacement Brands (Cardone, WAI Global):
These brands aim to provide an OE-equivalent repair. Cardone is a common brand for both new and remanufactured parts. However, owner reviews are mixed; some report premature failures of internal components like the ignition module or poor build quality, while others find them to be a cost-effective solution that works well. WAI Global is another option in this category. These are suitable for a daily driver or a stock restoration where budget is a key consideration.
Budget-Friendly Brands (Replacement):
These are typically the most affordable option. Quality can be inconsistent, but they can get your truck back on the road. Be aware that some lower-cost distributors may use cheaper components, like aluminum cap terminals instead of brass, which can corrode faster. They might be a good short-term fix, but for long-term reliability, consider a mid-tier or performance brand.
Pro Tip: When replacing the entire distributor, it's critical to set the engine to Top Dead Center (TDC) on the #1 cylinder's compression stroke before removing the old unit. Mark the position of the old distributor housing and rotor. This will make installing the new one and setting the ignition timing much easier. While you can get it close, a final timing adjustment with a timing light is always recommended for best performance.
Cost of a New Distributor for a 1987 Chevrolet V20
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Distributor | $151 - $620 |
| Shop Labor for Installation | $150 - $250 |
Frequently Asked Questions
Do I need to replace the whole distributor or just the cap and rotor?
If your truck is just having minor misfires or it's time for a tune-up, replacing the cap and rotor is standard maintenance. If you have a no-start condition, stalling when hot, or inconsistent spark, the problem might be the ignition module or pickup coil inside the distributor. In those cases, or if the distributor shaft has excessive play, replacing the entire unit is often the easiest and most reliable repair.
Do I need a timing light to replace my distributor?
Yes, it is highly recommended. While you can mark the old distributor's position to get the new one installed and the engine running, the timing will likely not be perfect. Using a timing light to set the initial and total timing correctly is crucial for engine performance, fuel economy, and longevity.
What is an HEI distributor?
HEI stands for High Energy Ignition. It's a system GM introduced that combines the ignition coil, cap, and rotor into a single, self-contained unit. It provides a much stronger spark than older points-style systems and is generally very reliable. Your 1987 V20 came from the factory with an HEI distributor.
Are there any recalls on the 1987 V20 distributor?
Searches of the National Highway Traffic Safety Administration (NHTSA) database did not show any recalls specifically for the distributor on the 1987 Chevrolet V20.
Technical Specifications
HEI (High Energy Ignition) type with integrated coil, vacuum advance, and electronic module.
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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.
- Chevrolet V20: