The distributor cap and rotor are essential components in older vehicles with a distributor-based ignition system. They work together to deliver electrical current from the ignition coil to the correct spark plugs, igniting the fuel-air mixture in the engine cylinders.
The distributor cap is a plastic component that holds the ignition system contacts. The rotor is a rotating part inside the cap that sends electrical current to the spark plugs in the correct firing order.
Follow these steps to replace your distributor cap and rotor. Make sure to refer to your vehicle's service manual for specific details.
Turn off the engine and disconnect the battery to avoid any electrical accidents while working with the ignition system.
Find the distributor cap on top of the distributor. The rotor is located inside the cap. The distributor is usually found near the front of the engine.
Before removing the components, note down the firing order of your engine. The firing order specifies the sequence in which electrical current flows to the spark plugs.
Unscrew or unclip the distributor cap, being careful not to disturb the rotor’s position. Set the cap aside.
Remove the rotor from the distributor shaft. It is usually held in place with a screw or clip. Set the old rotor aside and place the new one on the shaft.
Place the new rotor on the shaft and secure it. Then, install the new distributor cap, ensuring it aligns with the spark plug wire terminals.
Reconnect the spark plug wires to the correct terminals on the new distributor cap, following the firing order.
Reconnect the battery, start the engine, and check for proper performance. The engine should start smoothly, idle evenly, and accelerate without hesitation.
The following table outlines the typical labor prices for replacing a distributor cap and rotor in different vehicle types:
Vehicle Type | Labor Price (USD) |
---|---|
Compact Car | $80 - $120 |
Mid-size Sedan | $90 - $130 |
Full-size Sedan | $100 - $150 |
Pickup Truck | $110 - $160 |
Luxury Vehicle | $150 - $200 |
SUV | $120 - $170 |
Sports Car | $140 - $190 |