knock noise when releasing brake peddle

[Tarkus1212]

Hahaha. just realised.. what a dick I feel now.. was using the mobile site so wasn't clear that it was actually a golf forum and not a vw golf forum.. sorry people and yes I do play, love a knock

If you love a knock then why are you complaining about one? Live with it and enjoy

 

[williamalex1]

A Qantas pilot wrote in the repair/fault log book of a Jumbo 747, " there's a knocking noise coming from the hold , it sounds as if there's a midget with a hammer or something knocking.

Mechanic replies in book, " fault fixed , took hammer of midget " :rofl:

 

[harpo_72]

Hi I'm new to the forum after recently buying a 2004 mk4 golf tdi estate (1.9 pd engine). I have noticed a weird issue with the brakes.. when I bought the car there was a knocking coming from the passenger side front wheel which was fixed by the garage before I took it. I've recently noticed that there is still a knocking noise coming from that area which is related to braking. the brakes are fine and work perfectly but when stopping, if I release the brake peddle slightly before coming to a complete stop so as not to get the jerk you get if keep it on till fully stopping with the peddle down I get a knocking noise.. if I keep the peddle depressed until the car fully stops there is no knock and nothing when I release the peddle either.. it's weird, never experienced it before.. There's no knocking at all from the area of the car whilst driving, can hit a big hole in the road and nothing, all solid. Does anyone have any ideas what this might be???

Thanks

do you know what type of calliper it is? Opposing piston or fist?
The disc could be warped or a piston seal could be knackered.

 

[Blue in Munich]

Hi I'm new to the forum after recently buying a 2004 mk4 golf tdi estate (1.9 pd engine). I have noticed a weird issue with the brakes.. when I bought the car there was a knocking coming from the passenger side front wheel which was fixed by the garage before I took it. I've recently noticed that there is still a knocking noise coming from that area which is related to braking. the brakes are fine and work perfectly but when stopping, if I release the brake peddle slightly before coming to a complete stop so as not to get the jerk you get if keep it on till fully stopping with the peddle down I get a knocking noise.. if I keep the peddle depressed until the car fully stops there is no knock and nothing when I release the peddle either.. it's weird, never experienced it before.. There's no knocking at all from the area of the car whilst driving, can hit a big hole in the road and nothing, all solid. Does anyone have any ideas what this might be???

Thanks

do you know what type of calliper it is? Opposing piston or fist?
The disc could be warped or a piston seal could be knackered.

My guess from your description would be a sliding calliper with sticking sliders and a warped disc; if you come to a complete stop then the wheel is not still revolving when you halt and the warp on the disc doesn't try & knock the sticking calliper back. If you release pressure on the brakes & the calliper sticks rather than releasing then a warped disc will knock the sticking calliper off as it continues to rotate while you come to a complete halt. If you do the complete halt without letting pressure off then if you are stopped long enough then the calliper might free off before you drive off or you might briefly hear the knocking sound as you drive off again. Could also be a knackered piston seal not drawing the piston back but I'm inclined towards the sticky sliders. The you what, bring it along to the next meet and we can have a look while we take the proverbial in person…….

Welcome to the madhouse

 

[kid2]

Hi I'm new to the forum after recently buying a 2004 mk4 golf tdi estate (1.9 pd engine). I have noticed a weird issue with the brakes.. when I bought the car there was a knocking coming from the passenger side front wheel which was fixed by the garage before I took it. I've recently noticed that there is still a knocking noise coming from that area which is related to braking. the brakes are fine and work perfectly but when stopping, if I release the brake peddle slightly before coming to a complete stop so as not to get the jerk you get if keep it on till fully stopping with the peddle down I get a knocking noise.. if I keep the peddle depressed until the car fully stops there is no knock and nothing when I release the peddle either.. it's weird, never experienced it before.. There's no knocking at all from the area of the car whilst driving, can hit a big hole in the road and nothing, all solid. Does anyone have any ideas what this might be???

Thanks

Welcome.
First things first.
BTW I'm a panel beater so have a decent knowledge of cars.
A knock when breaking if coming to a stop could only be one a a few things.
Is it a good thump that you can feel on the floor with your feet or is it more of a shallow knock.

Check all the subframe bolts to the chassis legs on the Passanger side.
Also check the bolts in wish bones for play. It could be that you have a loose bolt or a loose anchor point for a bolt. Braking like that with a knock is normally suspension related rather than brake related. If it was a caliper you'd nearly hear it when hitting bumps.

The reason your not hearing with bumps if its a subframe issue is because of the weight of the car pressing on it. It's probably sliding when you brake. Get the car on a lift and check all bolts and anchor points under it. There has to be play in some part of the suspension.

 

[CliveW]

I agree, sounds very like worn suspension bushes to me. Likely to be wishbone to subframe.

 

[Tashyboy]

Quality thread.

 

[Bunkermagnet]

Not sure if the Mk 4 Golf has the same front suspension as the Audi A4, Passat or Skoda Superb but they all suffer with front suspension linkage noises through wear. If the bolts havent been routenely undone and tightened, they can be an absolute bitch to remove to do it.

 

[gstevens26]

Thanks guys. Some good answers there. I'll get it looked into this weekend..