What Is a Rotor Cap

Distributor caps and rotors are responsible for passing the voltage from the ignition coils to the engine’s cylinders in order to ignite the fuel-air mixture inside and power the engine. … Because of all the high-voltage activity, the rotor and cap have to be replaced relatively frequently. They wear out easily.

How much is a rotor cap?

What is this? When you need to replace your distributor cap and rotor because they have gone bad, you can expect to pay anywhere from $70 to $130 for the job. This total includes both parts and labor costs together. In most cases, expect to pay somewhere between $30 and $60 for parts and another $40 to $70 in labor.

When should I replace my cap and rotor?

Replacing the distributor cap and rotor at the same time should be completed every 50,000 miles, regardless of whether or not they are damaged. If your vehicle does not put on a lot of miles every year, it’s also a good idea to replace them every three years.