[s-cars] ABS Sensor - front axle

[Peter Schulz]

Manny:

I didn't pull the sensor, 
I believe that the sleeve acts as a spring to retain the sensor it the position in the housing.

Bentley only says to press the sensor into the housing until it's seated.
Evidently there is enough tolerance that it can be seated too deeply.

My recommendation is push it in until it contacts the CV, then back it off no more than 1 mm.
If you get an ABS fault, then you know that you will have to tap it in a bit further.

I've had to replace a few of these sensor as the old ones were destroyed on removal when they wouldn't come out of the housings for an off chassis wheel bearing replacement.
Also replaced the destroyed sensor sleeve with another used one.

In all cases I've replaced with used parts, and have yet to have an issue with an an ABS issue due to sensor spacing.

YMMV.

-Peter


On Oct 4, 2010, at 9:17 AM, Manuel Sanchez wrote:

> Peter,
> 
> Did your sleeve have an "end" to it that would stop the sensor from touching the toothed wheel?
> 
> I did apply a thin film of grease on the sensor. Lubrication is the key to many things in life.
> 
> Regards,
> 
> Manny
> On Oct 4, 2010, at 9:12 AM, Peter Schulz wrote:
> 
>> I've been able in many cases to re use old sleeves.
>> Its important to lubricate the sleeve with some grease before you install it.
>> 
>> You definitely DON'T want to wear a groove into the sensor - its just a thin metal cover over the hall sensor.
>> 
>> -Peter
>> 
>> On Oct 4, 2010, at 9:02 AM, John Cody Forbes wrote:
>> 
>>> I'm not positive this applies to the S-cars, but if it's like other Audi models of the era you missed a step. The sleeve that holds the sensor must be replaced every time as they stick out beyond the end of the sensor. When you "insert until it stops" the stoping 


-Peter Schulz
Chelmsford Ma, USA
http://www.naaclub.org/

1995.5 S6 Avant Emerald/Ecru
1995.5 S6 Avant Silver/Platinum
1991 90Q 20v Q Red
1991 90Q 20v Indigo
1991 CQ silver  (eS2 recipient)