Brake pistons are designed to push the brake pad against the rotor when the brakes are applied. Over time, they can become dirty and corroded, making it difficult for them to return to their original position. Here are some tips on how to get your brake pistons back in:
1. Clean the area around the piston with a BrakeKleen or other cleaning solution. This will remove any dirt and debris that could prevent the piston from moving freely.
2. Lubricate the area around the piston with a silicone-based lubricant. This will help reduce friction and allow the piston to move more easily.
3. Use a C-clamp or similar tool to slowly push the piston back into place. Be careful not to force it, as this could damage the seal around the piston or cause other problems.
4. Once the piston is in place, pump the brakes several times to make sure they're working properly before driving again