Chevy 350 Hei Distributor Wiring Diagram

By | May 14, 2023

Chevy 350 HEI Distributor Wiring Diagram

The Chevy 350 HEI distributor is a popular choice for many car enthusiasts looking to improve the performance of their engine. This distributor features a number of advantages over the stock distributor, including a higher spark advance curve, better oiling, and a more durable design. However, installing a HEI distributor can be a daunting task, especially if you're not familiar with the wiring. This article will provide you with a step-by-step guide on how to install a HEI distributor on a Chevy 350 engine. We'll cover everything from removing the old distributor to connecting the new one. By the end of this article, you'll be able to install a HEI distributor with confidence. ### Step 1: Remove the Old Distributor The first step is to remove the old distributor. To do this, you'll need to: 1.

Disconnect the battery.

This is a safety precaution to prevent any electrical shorts. 2.

Locate the distributor cap.

The distributor cap is a round, black cap that sits on top of the distributor. It is held in place by a series of bolts. 3.

Remove the distributor cap bolts.

Use a socket wrench to loosen and remove the bolts that hold the distributor cap in place. 4.

Remove the distributor cap.

Once the bolts are removed, you can lift off the distributor cap. 5.

Locate the distributor rotor.

The distributor rotor is a metal shaft that sits inside the distributor cap. It has a pointed tip that rotates in contact with the spark plugs. 6.

Remove the distributor rotor.

To remove the distributor rotor, grasp it firmly and turn it counterclockwise until it comes loose. 7.

Remove the distributor.

The distributor is held in place by a bolt at the bottom. Use a wrench to loosen and remove this bolt. 8.

Pull out the distributor.

Once the bolt is removed, you can pull the distributor out of the engine. ### Step 2: Install the New Distributor Now that you've removed the old distributor, you can install the new one. To do this, you'll need to: 1.

Install the distributor gasket.

The distributor gasket is a thin, round piece of rubber that seals the distributor to the engine. It is located between the distributor and the engine block. 2.

Install the distributor.

Carefully insert the distributor into the engine block. Make sure that the distributor shaft lines up with the oil pump drive gear. 3.

Install the distributor bolt.

Use a wrench to tighten the distributor bolt until it is snug. 4.

Install the distributor rotor.

Align the distributor rotor with the number 1 spark plug wire. Then, push the distributor rotor down until it snaps into place. 5.

Install the distributor cap.

Align the distributor cap with the distributor. Then, install the bolts that hold the distributor cap in place. 6.

Connect the battery.

This is a safety precaution to prevent any electrical shorts. ### Step 3: Connect the Wiring The final step is to connect the wiring to the new distributor. To do this, you'll need to: 1.

Locate the distributor wiring harness.

The distributor wiring harness is a black, plastic harness that connects to the distributor. It is located near the distributor. 2.

Identify the distributor terminals.

The distributor terminals are located on the bottom of the distributor. They are labeled "1", "2", "3", "4", and "5". 3.

Connect the wiring harness.

Connect the wiring harness to the distributor terminals. Make sure that the wires are connected to the correct terminals. Once you have connected the wiring, you can start the engine and test the distributor. If the engine starts and runs properly, you have successfully installed the HEI distributor. ### Conclusion Installing a HEI distributor on a Chevy 350 engine is a relatively straightforward task. However, it is important to follow the steps in this article carefully to avoid any problems. By following these steps, you can install a HEI distributor with confidence and improve the performance of your engine.


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