Groaning under hood when brakes applied

Hi,

I attached a pic of the power brake booster below. The highlighted push rod is what the brake pedal attaches to when you install the booster. On the opposite end of the booster is where the master cylinder is located. What I need you to do is first check if the booster is where the noise is coming from. Also, I need to know if it is a creaking sound or does it sound like an air pressure issue.

Don't laugh, go to the parts store and ask for an automotive stethoscope. You can use that to identify where the noise is loudest to find the problem.

In this case, there is a good chance the booster will need replaced, but lets confirm that first.

Joe

Hi,

That will do it. Anytime I do brakes, I remove the pins, properly clean and lubricate them, and something other that a lot of people don't do. I take the caliper mount where the hardware holds the pads and file the rust and corrosion from them. You would be surprised how often the rust will expand and place pressure on the hardware and prevent a brake pad from moving.

Regardless, I'm glad you got it fixed. Please feel free to come back in the future.

Joe