Mark944na86

I'm about to do a clutch job, so first order of business is disconnection of the speed reference sensors from the clutch bellhousing.

A 944 is supposed to have 2 separate sensors in a bracket, whereas the 968 only has one sensor.

My 1990 S2 seems to have the 968 set-up (one sensor) rather than the typical 944 set-up (two sensors). Pic below. Can anyone verify? Is this is normal for 1990 S2? (PET seems to be suggesting it should be a 2 sensor set-up.)

Question 1: How does this affect the steps for removal/reinstallation? Does it even still need to be removed to clear the bellhousing for removal?

Question 2: I was intending to "notch" my bellhousing to make removal of the senaors bracket unnecessary in the future if removing the bellhousing. Can/should this still be done with the single sensor set-up?

Thanks for any advice. [X-posted into 968 forum because it occurs to me this might be a more familar set-up for 968 owners than 944 owners...]

RajDatta

With an S2, Porsche went to 60-2 trigger setup. So, you only need one sensor like the 968.

Answer 1: Even though teh bell housing can be removed with the sensor in place, its easy to damger it with the flywheel teeth. I recommendation is to pull it off from it's hole.

Answer 2: I would look at the factory manual for S2 to see how they tell you to time TDC. On 968's there are 3 scribe marks on the front side of the flywheel.


Raj

Mark944na86

Thanks Raj.

I've pulled the sensor from the bracket to avoid damaging it, but does the bracket need to come off to allow the bellhousing to be removed? (My 944 FSM only refers to the two sensor set-up, unfortunately.)

RajDatta

Looking at your picture, it looks like the sensor is seated into the bell housing. If that is the case, as long as the sensor is out, you should be able to pull the housing off.
Raj