Knocking noise when I brake!!!

1. j_a_lyons Regular Poster Joined: May 2010 Manchester Posts: 396 Vauxhall Astra SRI 3 door 1.8 with XP black Furio

   #1 18th June 2010, 00:41

   When i first put my foot on the brake my car makes a knocking noise once. The longer I go without pressing the brake the more likely it seems to be to do it. Any ideas what it could be? Thanks
2. laberridge Established Member Joined: Mar 2009 rotherham Posts: 1369 saxo westcoast

   #2 18th June 2010, 01:22

   can either be your driveshafts, knocking, meaning leaking cv grease or there just worn out, or strangly enough it can be our track rod end that might be loose.
3. j_a_lyons Regular Poster Joined: May 2010 Manchester Posts: 396 Vauxhall Astra SRI 3 door 1.8 with XP black Furio

   #3 18th June 2010, 01:35

   I can't see anything leaking, how much are drive shafts? Are the easy to fit? I have no experience at all with cars yet
4. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #4 18th June 2010, 09:56

   could be a wheel bearing. does the pedal vary in heights when you press it?
5. j_a_lyons Regular Poster Joined: May 2010 Manchester Posts: 396 Vauxhall Astra SRI 3 door 1.8 with XP black Furio

   #5 18th June 2010, 12:34

   I'm not sure about varying in height but it is a bit loose i think because when i first press the pedal it feels loose for the first few cm before it actually brakes.
6. user_26153 Established Member Joined: Aug 2008 Blackpool, UK (occasionaly Isle Of Wight) Posts: 1121 Citroen Saxo VTR 2001 Eunos Roadster

   #6 18th June 2010, 13:26

   Quote:

   Originally Posted by j_a_lyons when i first press the pedal it feels loose for the first few cm before it actually brakes.

   i thought that was standard as pressing it for like the first cm just puts the brake light on
7. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #7 18th June 2010, 16:14

   what i'm trying to get at is a wheel bearing can wobble causing the disc to press the pads back in the caliper causing more pedal travel required to brake. If frequent braking is done the pedal can stay near the top and firm. If not the pedal can go spongy and travel further
8. j_a_lyons Regular Poster Joined: May 2010 Manchester Posts: 396 Vauxhall Astra SRI 3 door 1.8 with XP black Furio

   #8 18th June 2010, 17:15

   I do tend to have to push the brakes down hard to stop the car and they are quite squeaky but i know my pads and disks need changing soon so not sure if it has anything to do with that. The knocking noise has been getting more frequent since I bought the car as far as I can tell. Not sure if this helps . Sorry, I still don't know much about cars lol.
9. laberridge Established Member Joined: Mar 2009 rotherham Posts: 1369 saxo westcoast

   #9 18th June 2010, 17:24

   Quote:

   Originally Posted by tweedie i thought that was standard as pressing it for like the first cm just puts the brake light on

   yeah i thought the same, had 3 saxos with that, and a few mates.
10. djgaz9 Frequent Poster Joined: Feb 2010 glasgow Posts: 739 SAXO VTR

    #10 18th June 2010, 17:25

    mine kind of vib's when i break but i got told that i need 2 new front disc brakes
11. j_a_lyons Regular Poster Joined: May 2010 Manchester Posts: 396 Vauxhall Astra SRI 3 door 1.8 with XP black Furio

    #11 18th June 2010, 22:57

    All I can do is change the brake disks and pads and go from there I suppose. As for the knocking, I hope it's nothing serious i'll have to see how it goes. A mate mentioned it could be the drive shafts, i'll have to have a look at them and maybe replace if I can, i've never done them before so could be difficult. Just trying to avoid large garage bills lol.
12. Aaron Saxperience Post Whore Joined: Jan 2008 ..... Posts: 5231 ..............

    #12 18th June 2010, 23:14

    could be even engine mount worn.
    jack it up and look
    or take to a garage and get them to diagnose