How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt
Matt, Mechanical Engineer
Category: Renault
Satisfied Customers: 21598
Experience:  BEng hons Mech engineering, in auto industry 22 years
12772297
Type Your Renault Question Here...
Matt is online now

Making a buzzing and shedding on light pressure on the pedal

Customer Question

Making a buzzing and shedding on light pressure on the pedal does not do it when you apply hard pressure.
Submitted: 11 months ago.
Category: Renault
Expert:  Shantal-Mod replied 11 months ago.
Hello,
I'm Shantal and I'm a moderator for this topic.
I've been working hard to find a Professional to assist you with your question, but sometimes finding the right Professional can take a little longer than expected.
I was checking to see if you had already found your answer or if you still need assistance from one of the Professionals.
Please let me know if you wish to continue waiting or if you would like for us to close your question?
Thank you,
Shantal
Expert:  Matt replied 11 months ago.

Hello

can you elaborate on which pedal this is please? and the car make, model and year

I'm assuming its the brakes

so in which case I'd start by jacking the car up so you can check that each wheel turns freely to ensure no wheel is binding up

if they are binding then

I'd strip the calipers down and check that the pads are in square and true with no debris in the mounting slots, also inspect the caliper mounting faces for any dents, burrs, or debris which would cause them to be bolted up out of true, also remove the disc and do the same for its mounting face on the upright and inside the disc.

If you still have an issue then it could be a flexible brake line has partially collapsed and is producing a one way valve, this can't always be seen from the outside but you can test to see if there's any residual pressure in that caliper by cracking off the bleed nipple after stamping on the brake a few times

Another possibliity is that one caliper is sticking slightly so the piston isn't retracting on its seals

in which case that caliper will need rebuilding with new seals or replacing

Expert:  Matt replied 11 months ago.

Hi

do you still need help?

Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you