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-   -   very hot front wheel (https://www.audiworld.com/forums/a6-s6-c5-platform-discussion-7/very-hot-front-wheel-2848769/)

get a6 to 14 years 06-09-2013 12:55 PM

very hot front wheel
 
I have a right hand drive 2002 avant 1.9 tdi 130bhp 5 speed sport susp. The front passenger wheel gets hot after a drive,Caliper even hotter. This has being happening for over three years.The pads in that side would also be more worn than the other side. I have chaged the pads then the flex pipes on both sides and lately the caliper but the same problem remains.My wife drives the car herself and see did say to me that she has noticed at times the car pulling to the left when driving.I have driven the car with this hot and jammed on the brake peddal and the car stops on a straight line.What I do know is the pads are coming in contact with the disc and this is leading to the overheating. You would not be able to keep your hand on the wheel. The car has done 143000 miles it has 16" wheels all the other three wheels are nice and cool. I find the brakes quite grabby I drive a 2007 Honda Accord 2.2 diesel and those are not grabby. One question I have is the ESP or other electronic controller causing this problem ?. One other thing the car drops out of cruise control at times on it own this might explain some of the issues.

Just Me 06-09-2013 02:11 PM

I would start with basics.

1. are the pads installed correctly. Yes, they can be slightly out of square, i've seen it
2. are the calipers sticking ( i bet yes). They may need to be over-hauled

I don't know what flex pipes are. do you meant he flexible brake lines? When you did that might you have buggered something? I prefer not to touch them if they show no signs of deterioration.

ABS certainly COULD cause this, but without a code, i doubt it is your culprit.

I suspect a piston is not retracting.

Grant

SloopJohnB@mac.com 06-10-2013 07:26 AM


Originally Posted by get a6 to 14 years (Post 24452568)
I have a right hand drive 2002 avant 1.9 tdi 130bhp 5 speed sport susp. The front passenger wheel gets hot after a drive,Caliper even hotter. This has being happening for over three years.The pads in that side would also be more worn than the other side. I have chaged the pads then the flex pipes on both sides and lately the caliper but the same problem remains.My wife drives the car herself and see did say to me that she has noticed at times the car pulling to the left when driving.I have driven the car with this hot and jammed on the brake peddal and the car stops on a straight line.What I do know is the pads are coming in contact with the disc and this is leading to the overheating. You would not be able to keep your hand on the wheel. The car has done 143000 miles it has 16" wheels all the other three wheels are nice and cool. I find the brakes quite grabby I drive a 2007 Honda Accord 2.2 diesel and those are not grabby. One question I have is the ESP or other electronic controller causing this problem ?. One other thing the car drops out of cruise control at times on it own this might explain some of the issues.

Bad caliper one way or another. It's a floating caliper so remove it and ensure the guide pins are clean and lubricated. Blow the piston out and clean the cylinder and piston and replace the seal and dust boot. Depending on what you find, consider doing the other calipers as well.

Airbag 06-10-2013 03:13 PM


Originally Posted by SloopJohnB@mac.com (Post 24452776)
Bad caliper one way or another. It's a floating caliper so remove it and ensure the guide pins are clean and lubricated. Blow the piston out and clean the cylinder and piston and replace the seal and dust boot. Depending on what you find, consider doing the other calipers as well.

was the caliper you put in new or from a wreckers ?

SloopJohnB@mac.com 06-11-2013 06:51 AM


Originally Posted by Airbag (Post 24452942)
was the caliper you put in new or from a wreckers ?

Wasn't me...

Airbag 06-13-2013 05:25 AM

oh right ... sorry , was for the OP .. guess the thread Nazis will be on me now :)

get a6 to 14 years 06-17-2013 12:26 PM


Originally Posted by SloopJohnB@mac.com (Post 24452776)
Bad caliper one way or another. It's a floating caliper so remove it and ensure the guide pins are clean and lubricated. Blow the piston out and clean the cylinder and piston and replace the seal and dust boot. Depending on what you find, consider doing the other calipers as well.

I have got the caliper replaced and the same problem is still there.

get a6 to 14 years 06-17-2013 12:27 PM


Originally Posted by Airbag (Post 24452942)
was the caliper you put in new or from a wreckers ?

Hi, It is a new one.

get a6 to 14 years 06-17-2013 12:31 PM


Originally Posted by Just Me (Post 24452597)
I would start with basics.

1. are the pads installed correctly. Yes, they can be slightly out of square, i've seen it
2. are the calipers sticking ( i bet yes). They may need to be over-hauled

I don't know what flex pipes are. do you meant he flexible brake lines? When you did that might you have buggered something? I prefer not to touch them if they show no signs of deterioration.

ABS certainly COULD cause this, but without a code, i doubt it is your culprit.

I suspect a piston is not retracting.

Grant


Hi, it is only happening to the front left caliper and I have changed this but the same problem is still there. The flex pipes are the ones on to the wheel hub. All work is carried out by my local garage.I have had the car with a audi dealer and they wanted to strip the car and replace every thing..... I ran away.

Huskerbob 06-17-2013 01:35 PM


Originally Posted by get a6 to 14 years (Post 24455593)
Hi, it is only happening to the front left caliper and I have changed this but the same problem is still there. The flex pipes are the ones on to the wheel hub. All work is carried out by my local garage.I have had the car with a audi dealer and they wanted to strip the car and replace every thing..... I ran away.

If the caliper is new and everything else at the wheel is working correctly and the rotor is the correct one then I think you need to go back upstream in the hydraulics. Maybe the ABS module?


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