Determine the steps for a correct bleeding process
Each time you change something to the braking system, or if the level in the master cylinder gets too low, air gets trapped into the brake lines. This will make the pedal feel spongy, and decrease the braking power. To solve this problem you need to learn to bleed the system.
Follow these steps:
- Behind each wheel on the part with a rubber hose on it there is the brake valve.
- You must advance starting from the rear wheels to the front ones.
- Check if the bleeder valve is stuck. If so, spray some penetrating oil on it and wait a while. Try again to open the valve just to see if it’s unblocked. Tighten it back after that.
- Check the master cylinder’s level. It must be full. Fill it if needed.
- Prepare a rubber hose, and a plastic container. Get under the car and connect the rubber hose to the nipple of the valve, and then place the other end inside the canister.
- Put on you rubber gloves and ask your assistant to get in the vehicle, start the engine and pump the brake pedal. You have to release the bleeder valve while the assistant holds the pedal pressed. Meanwhile, brake fluid will start pumping through the hose and into the container. Tighten the valve and tell the assistant to release the pedal. Repeat the procedure until the fluid comes without any air trapped inside.
- Get to the master cylinder and refill it. While you perform the bleeding, this must always be full, so that air doesn’t get into the lines.