How to Replace the Ignition Coil in a Chevy Corvette

A Chevy Corvette with a high energy ignition (HEI) distributor system typically triggers the spark plugs via the ignition coil. Chevy also uses an ignition coil in the newer distributorless ignition systems, which replace the distributor with a powertrain control module (PCM).

Instructions

1

Put your safety first. Engage your emergency or parking brake. Also, disconnect the negative battery cable from the Chevy Corvette's battery.

2

Make the ignition system visible. On older models, you may need to remove the plenum extension for the intake manifold using a screwdriver or wrench. For newer models, remove the cover for the fuel rail.

3

Look for additional parts that you need to remove. For HEI systems, you need to access the distributor through the cap. Other systems use an ignition coil harness connector.

4

Disconnect the secondary wires, or spark plug wires, from the ignition coil. Tag each wire with masking tape, so you know which terminal to reconnect the wire to. If you connect the wrong wires to the terminals, your Chevy Corvette won't start.

5

Detach the ignition coil mounting bolts and remove the ignition coil. The amount and type of bolts vary depending on the part number for the Corvette ignition coil. You may also need to remove the ignition coil arc seal.

6

Clean the distributor cap with a soft cloth. Now is a good time to replace the seal, if needed. Insert your new ignition coil and secure it in place. As you reassemble, use a Torque wrench to tighten the mounting bolts or screws to 13 inch pounds (1.5 Nm) of torque.

7

Reassemble the rest of the parts and reconnect your battery. Start the Chevy Corvette to ensure the repair worked.