996 turbo wheel bearing....sensor inside?
#1
996 turbo wheel bearing....sensor inside?
Hey guys, I'm currently in the middle of replacing my front wheel bearings on the 2001 996 turbo. I was reading the pelican parts tech article on this and it mentions that some bearings have an abs or wheel speed sensor inside and they can only be installed one way and the only way to find out which side it is on is with a special detector card. Do I need to worry about this on my car or can I press them in either way? The bearings are worn and started getting loud up front. Thanks!
#2
speed sensors tone rings are on the CV shafts, bearings are plain unitary rollers
#4
RL Community Team
Rennlist Member
Rennlist Member
^ Very interesting.
#5
#6
Three Wheelin'
Sorry never heard about the magnetized portion of a wheel bearing....Also I've check the repair manual for the installation of the rear bearing and no mention of this anywhere.....We got a dented wheel and a sensor on each wheel for the ABS... I went to check on my wheel bearings, front and rear, and there are no magnetized portion on them..... May be this is applicable on other model but not on 996 turbo....
#7
RL Community Team
Rennlist Member
Rennlist Member
Is it only the front bearings that have the magnetic sensor?
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#9
RL Community Team
Rennlist Member
Rennlist Member
Sorry, I was not talking about the wheel speed sensor. I was talking about the bearing itself. Pelican is saying the front wheel bearing definitely has a magnet built into the wheel bearing. Does the rear wheel bearing have magnets too?
Last edited by Carlo_Carrera; 11-11-2017 at 10:30 PM.
#10
Race Car
It seems to me if a car had specially magnetized wheel bearings for ABS, it would also not have the toothed ABS rings. The 996TT has toothed ABS rings just like older cars. What would be the purpose of having both?
Dan
Dan
#12
RL Community Team
Rennlist Member
Rennlist Member
Got it. Not applicable for our cars. Thanks.
#13
It was my friend that's been a long time tech at the dealership that showed me how one side was magnetic and needed to be closes to the sensor. One side was definitely magnetic and one wasn't. I'll ask him if he was mistaken on what years utilized the magnet.
#14
Three Wheelin'
Yes please do, it is a bit confusing especially the repair manual , on the installation of the rear bearing page 771-772, does not mention anything about which side the bearing should be slide in the housing.....Thanks....
#15
I went ahead and installed it so the bearing brand and part numbers are facing out. Like the guy in the 2nd post stated, it appears the only sensor is the toothed ring on the cv axle and the magnetic pickup right above it. I'm seeing so much conflicting info on this subject. The bearing does not appear be magnetic on either side.