Sierra Distributor Cap 18-5243, Replaces 3859019, for Delco HVS V-6 Distributors

The Sierra 18-5243 is a replacement distributor cap engineered for engines equipped with a Delco HVS distributor with an extended bracket, specifically Delco HVS V-6 distributors. It is a direct fit for the ignition system, restoring a proper seal against moisture and delivering reliable spark distribution to keep the engine firing correctly on every cylinder. The cap is finished in white with a twist-on closure for a secure, tool-free installation and removal during routine maintenance.

This distributor cap is a wear item that should be inspected and replaced when it shows cracking, carbon tracking, corrosion at the terminals, or a compromised twist-on seal, all of which can cause misfires, hard starting, or rough idle. Installing the correct Sierra 18-5243 cap for a Delco HVS V-6 distributor with extended bracket ensures the terminals and cap geometry line up properly with the rotor and ignition wiring, so the ignition system performs as designed.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5243
• Product Type: Distributor Cap
• Color: White
• Closure Type: Twist-On
• Item Dimensions: 3.6 x 7.1 x 5 inches
• Weight: 0.68 pounds
• Unit Count: 1
• UPC: 808282167547
• Fits: Engines equipped with Delco HVS distributor with extended bracket
• Replaces (OEM): 3859019

Fitment

• Delco HVS V-6 Distributors (engines equipped with Delco HVS distributor with extended bracket)

Replaces (OEM)

• 3859019

Frequently Asked Questions

What does the Sierra 18-5243 distributor cap fit? The Sierra 18-5243 fits engines equipped with a Delco HVS distributor with an extended bracket, specifically Delco HVS V-6 distributors.

Is the Sierra 18-5243 the same cap used on V-8 Delco HVS distributors? No, the 18-5243 is built for Delco HVS V-6 distributors; a V-8 Delco HVS distributor uses a separate cap part number.

What OEM number does the Sierra 18-5243 replace? It replaces OEM number 3859019.

What color is the Sierra 18-5243 distributor cap? It is finished in white.

How is the Sierra 18-5243 secured to the distributor? It uses a twist-on closure, allowing it to be installed and removed without additional tools.

What are the dimensions of the Sierra 18-5243? The cap measures 3.6 x 7.1 x 5 inches.

How much does the Sierra 18-5243 distributor cap weigh? It weighs 0.68 pounds.

How many caps come in a Sierra 18-5243 purchase? One distributor cap (unit count of 1) is included.

When should the Sierra 18-5243 distributor cap be replaced? Replace the 18-5243 when the cap shows cracking, carbon tracking, terminal corrosion, or a worn twist-on seal, since any of these can cause misfires or hard starting on a Delco HVS V-6 distributor.

Is the Sierra 18-5243 a genuine aftermarket replacement or a used OEM part? The 18-5243 is a new aftermarket distributor cap manufactured by Sierra as a direct replacement for OEM number 3859019.