How to Replace Starter Motor Carbon Brushes?
2 Answers
To replace the starter motor carbon brushes, simply remove the plastic cover. There are two black plastic nut-like components on the motor that need to be removed, after which the carbon brushes can be taken out and replaced. Carbon brushes, also known as brushes, are sliding contact components widely used in various electrical equipment. The materials used for carbon brushes in products mainly include graphite, impregnated graphite, and metal graphite. Carbon brushes are devices that transfer energy or signals between the stationary and rotating parts of motors, generators, or other rotating machinery. Generally, the carbon brushes in a car's starter motor need to be replaced after about 2000 hours of normal operation. The lifespan of carbon brushes is influenced by various factors, such as the overall quality of the motor, the composition of the carbon brushes, the smoothness of the motor's commutator, the load size, and the current magnitude.
I often repair cars myself, and replacing the starter motor carbon brushes is quite interesting. The steps are: first disconnect the positive and negative terminals of the car battery to ensure safety, then locate the starter motor position on the side of the engine, and remove it using a wrench and screwdriver. After opening the casing, you can see the carbon brushes, usually black block-like pieces; if they are worn short or cracked, they need to be replaced. Purchase new carbon brushes of the matching model, carefully align and press them into the slots, ensuring the springs are neither too loose nor too tight. When reinstalling the starter motor, tighten the screws evenly, and after reconnecting all the wires, test-start the car. The whole process requires patience—wear gloves to prevent oil stains and check the wiring to avoid short circuits. Doing it yourself can save you a hundred or two in repair costs, but it’s safer to watch tutorial videos and prepare the tools in advance. Don’t rush to avoid incorrect installation. You can also clean the dust to extend its lifespan.
