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Mad Scientist
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# 253065 24-Jul-2019 09:09
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So my car has developed severe brake judder.

The steering wheel shakes violently when the brakes are first heated up ie braking down a steep hill at motorway speeds. It continues to shake but less violently when you apply less brake pressure when going down the next hill. At City speeds down a hill I can just about perceive the judder but it's not significantly noticeable.

In summary violence of shaking proportional to brake pressure applied.

There are a lot of reasons why and I'd like some recommendation for brake experts in Dunedin.

Also looking at upgrading the brakes hence wanting not to have cowboys involved. Low expectations here as I do not want to disturb the brake balance / stability control computers with a shock to the system. Or will it just work fine?




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  # 2282598 24-Jul-2019 09:13
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When this happened on my car I had to get new rotors installed.   The existing rotors were machined before so needed to be replaced.

 

 


Hmm, what to write...
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  # 2282599 24-Jul-2019 09:13
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Either go to Sims Brakes, 3 Orari Street, or just order a new set of discs (and pads) and do it yourself





Matthew


 
 
 
 


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  # 2282607 24-Jul-2019 09:18
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Sounds like a disc issue


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  # 2282611 24-Jul-2019 09:24
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it may not be the brakes, it may be your brushes in your suspension /steering arm that are worn and when you brake hard  everything moves back and forth making everything shudder.





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  # 2282613 24-Jul-2019 09:24
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As mentioned above, it'll more than likely be the brake rotors, although I have had the same symptoms in an old car of mine, which ended up being a jammed piston in one of the front brake calipers.

 

If you're mechanically minded, you should be able to eyeball the brake rotors, more than likely they'll have a significant lip on the edge of them, either requiring machining, or replacing if they're below the minimum width.


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  # 2282617 24-Jul-2019 09:28
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Had the same, car would shudder when applying the brakes.   Way worse going down hill. They machined the rotors, then just like new again. 

 

Didn't cost much either. 

 

We use a family owned workship. I'm not sure you need a specific brake specialist. 




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  # 2282627 24-Jul-2019 09:38
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surfisup1000:

Had the same, car would shudder when applying the brakes.   Way worse going down hill. They machined the rotors, then just like new again. 


Didn't cost much either. 


We use a family owned workship. I'm not sure you need a specific brake specialist. 



Good point. Only cost $130 to machine so will go that route first.




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  # 2282629 24-Jul-2019 09:41
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100% the rotors, its a simple thing for mechanic to swap out and put new pads in same time take about 1 hour. Rotors vary in price so shop around.





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  # 2282635 24-Jul-2019 09:53
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What brand of car, most Euros you cannot machine the rotors they are a full replacement if they loose true run, and not particularly expensive.

 

Japanese cars typically can have their rotors machined once in life, but if too far gone its a new set of rotors.

 

Cyril




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  # 2282656 24-Jul-2019 10:07
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Subaru with 50 000 ks. Happened at about 40+ 000 ks or thereabouts. Why can't you machine Euro brakes?




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  # 2282657 24-Jul-2019 10:11
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Batman: Subaru with 50 000 ks. Happened at about 40+ 000 ks or thereabouts. Why can't you machine Euro brakes?

 

Most Euro cars seem to use softer materials than Japanese brake systems, so they wear faster but seem to perform better,. But a result of that is you dont seem to be advised to machine them, and typically when you replace pads you must replace rotors, fortunately they are not typically expensive. I should point out that having owned multiple euro and japanese brands over the years this has been my experience, others may vary.

 

Cyril




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  # 2282659 24-Jul-2019 10:11
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This reminds me of a brand new nissan suv I once had that had the same problem after hard braking down a ski field.

Got rotors replaced and was very very careful with braking after that, and it developed judder too! Not severe (because i was very gentle with the brakes) but it's there even during normal braking!




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  # 2283693 25-Jul-2019 20:58
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mdooher:

 

Either go to Sims Brakes, 3 Orari Street, or just order a new set of discs (and pads) and do it yourself

 

 

Thanks, it appears a new set of rotors is only slightly more expensive than machining, so I got a new set. Will report back after bedding in.





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  # 2283750 25-Jul-2019 21:46
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I had a car with bad brake shimmy which was exacerbated by heat from braking. I replaced the discs and it fixed the problem. However after the next 180km/h to 100km/h deceleration session the problem came back.



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  # 2283756 25-Jul-2019 22:07
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1eStar: I had a car with bad brake shimmy which was exacerbated by heat from braking. I replaced the discs and it fixed the problem. However after the next 180km/h to 100km/h deceleration session the problem came back.

 

i think i'm going to diagnose warped discs from overheating!





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