Notices
996 Forum 1999-2005
Sponsored by:

Replacing wheel speed sensor

Thread Tools
 
Search this Thread
 
Old 08-13-2010, 11:44 AM
  #1  
Van
Rennlist Member
Thread Starter
 
Van's Avatar
 
Join Date: Oct 2002
Location: Hyde Park, NY
Posts: 12,007
Received 88 Likes on 58 Posts
Default Replacing wheel speed sensor

For a few weeks I've been dealing with the ABS coming on at very slow speeds (under 11 MPH). I've mentioned it in other threads, and diagnosed it as a left rear wheel speed sensor with the Durametric tool.

I replaced it last night, and it solved my problem!

I just thought I'd share the fix (and also the pain of doing it) with everyone. I figured it would be about a 30 minute job... I have another car on the lift, so did this on the floor. Jack it up, remove the wheel, unplug the sensor - this all went smoothly, then it went down hill... the head of the sensor bolt sheared off. The sensor itself was corroded to the suspension carrier (I didn't know aluminum corrosion would bond to plastic, but it does!) - so I had to break the sensor apart and pull/drill it out in bits.

Eventually, I got all the bits of the old sensor out, and cleaned all of the corrosion out of the hole. Then I had to deal with removing the broken bolt. I used my welding technique (which I'll post a video of later) and was finally ready to put everything back together.

Total job was about 3 hours. But it's fixed!

The following 2 users liked this post by Van:
Ratchet1025 (07-30-2020), Tsandfor (07-30-2020)
Old 08-13-2010, 03:02 PM
  #2  
Van
Rennlist Member
Thread Starter
 
Van's Avatar
 
Join Date: Oct 2002
Location: Hyde Park, NY
Posts: 12,007
Received 88 Likes on 58 Posts
Default

Here's my video on how remove a broken bolt with the "welding technique".

The following 2 users liked this post by Van:
NightBlueTTS (07-10-2020), Ratchet1025 (07-30-2020)
Old 08-13-2010, 03:10 PM
  #3  
Edgy01
Poseur
Rennlist Member
 
Edgy01's Avatar
 
Join Date: Nov 2005
Location: Santa Barbara, CA
Posts: 17,699
Received 228 Likes on 124 Posts
Default

Good information. Thanks for your posting.
Old 08-13-2010, 03:20 PM
  #4  
Mother
Burning Brakes
 
Mother's Avatar
 
Join Date: Jan 2005
Location: Phoenix, AZ
Posts: 1,032
Likes: 0
Received 0 Likes on 0 Posts
Default

You JinXXed it by saying it was going to be a 1/2 hr job. Great video and thanx for taking the time to produce.
Old 08-13-2010, 03:52 PM
  #5  
C4CRNA
Three Wheelin'
 
C4CRNA's Avatar
 
Join Date: Jan 2005
Location: Cape Cod
Posts: 1,613
Likes: 0
Received 9 Likes on 4 Posts
Default

How much is a new sensor?
Old 08-13-2010, 05:10 PM
  #6  
function12
Burning Brakes
 
function12's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 978
Received 23 Likes on 20 Posts
Default

Awesome video. Any worries about the the car electronics and welding? What type of welder do you have?
Old 08-13-2010, 05:33 PM
  #7  
Sneaky Pete
Rennlist Member
 
Sneaky Pete's Avatar
 
Join Date: Nov 2008
Location: Mooresville, IN (Life Long Cheesehead)
Posts: 5,815
Likes: 0
Received 54 Likes on 35 Posts
Default

Oh what I could do only if I had the tools..........I'd make a female robot about 3 feet tall, flat head and big ears.....sorry it's been a long week!

Nice job Van!
Old 08-13-2010, 05:54 PM
  #8  
Van
Rennlist Member
Thread Starter
 
Van's Avatar
 
Join Date: Oct 2002
Location: Hyde Park, NY
Posts: 12,007
Received 88 Likes on 58 Posts
Default

Originally Posted by C4CRNA
How much is a new sensor?
$87 from Pelican (rear sensor p/n 996.606.406.00)


Originally Posted by function12
Awesome video. Any worries about the the car electronics and welding? What type of welder do you have?
It is best if you disconnect the ground terminal from the battery before welding - I didn't this time, but usually do.

My welder is a Lincoln mig that runs on 110v - it's a great little welder that I've had for years. Don't use the "flux core" wire-feed welders - they're a little cheaper than a mig (gas) flux welder, but the results aren't nearly as good. Spend the extra $100 and get the full mig setup.


Originally Posted by Sneaky Pete
Oh what I could do only if I had the tools..........I'd make a female robot about 3 feet tall, flat head and big ears.....sorry it's been a long week!

Nice job Van!
Pete, I see a bar in your immediate future...
Old 08-13-2010, 06:54 PM
  #9  
fbgh2o
Odd Posts
Rennlist Member
 
fbgh2o's Avatar
 
Join Date: Dec 2007
Location: Ottawa, Ontario
Posts: 3,633
Received 51 Likes on 27 Posts
Default

Seriously, you must have to world's best equipped home garage....
Old 08-13-2010, 06:58 PM
  #10  
Sneaky Pete
Rennlist Member
 
Sneaky Pete's Avatar
 
Join Date: Nov 2008
Location: Mooresville, IN (Life Long Cheesehead)
Posts: 5,815
Likes: 0
Received 54 Likes on 35 Posts
Default

Originally Posted by Van



Pete, I see a bar in your immediate future...
Nah...liquor store....its time for a few Weiss Biers and a cigar on the back deck.
Old 05-04-2015, 02:47 PM
  #11  
DobermanDad
Drifting
 
DobermanDad's Avatar
 
Join Date: Dec 2014
Location: Michigan
Posts: 2,128
Received 6 Likes on 6 Posts
Default

I have access to a MIG welder. Hope I don't need it. Great idea though.

What about hitting them with a cold chisel until they loosen? Like, removing the seat bolts.
Old 11-11-2015, 09:13 AM
  #12  
ScoobyDoo555
Track Day
 
ScoobyDoo555's Avatar
 
Join Date: Jun 2012
Location: United Kingdom..... near many fields!
Posts: 24
Likes: 0
Received 0 Likes on 0 Posts
Default

Well done!

I don't have Durametric, but still have to get the sensors out to check them over. (the beep-test fine).

What's the bolt type that retains the sensor?

Dan
Old 07-30-2020, 07:13 AM
  #13  
Tsandfor
2nd Gear
 
Tsandfor's Avatar
 
Join Date: Aug 2019
Posts: 2
Received 0 Likes on 0 Posts
Default Heat the aluminum first

First of all, great video! When I try to replace my sensor, I will try adding heat to the aluminum around the bolt first since aluminum thermally expands more than steel. While hot, spray in WD40 so the capillary action will draw the lubricant into the threads. Then maybe the bolt will come out without breaking. Be sure to apply Never-seize to the new bolt before inserting. Thanks again. Tim



Quick Reply: Replacing wheel speed sensor



All times are GMT -3. The time now is 01:08 AM.