Antilock brakes - rear sensors
 

Does anyone know what's inside the tip of these sensors?

They were jammed solid in the trailing arm/hub and I had to drift them out with the metal handle off a box spanner, which has dented the tips. If they need replacing, now is the time to do it before the subframe goes back in because it blocks access to the grommet that goes through the floorpan.

RH sensor (next two pics) is the most dented.

https://www.the75andztclub.co.uk/for...a1acea9739.jpg

https://www.the75andztclub.co.uk/for...a1acf008fe.jpg

Following two pics are the LH sensor.

https://www.the75andztclub.co.uk/for...a1acf40714.jpg

https://www.the75andztclub.co.uk/for...a1b61c83d9.jpg


I can't see any way of testing these things without having any hubs on the car.

:shrug:

You did well to drift them out. They often have to be drilled out.
I'd say renew these sensors as a matter of course because they will inevitably suffer from the removing stage. The tip contains electrickery that generates a voltage pulse when each of the magnets on the bearing's reluctor ring rotates past. The pulse tells the ECU how fast the wheel's turning.


TC

The RH one took some shifting TC - I was really whacking the drift rod, so I think it's almost certainly damaged the pickup or whatever is in the tip. The new ones will arrive today or tomorrow - I wonder if I should lubricate them with some red rubber grease or silicone grease (or something else) so they don't weld themselves in again. What do you think?