Caliper Fit

[chicagobreezz]

My local mechanic is having difficulty installing my recently restored rear brake calipers on my 1973 911S. They have black Pagid pads on them. He tells me he can't get the rotor to fit between the pads. He wants to use thinner SC pads which doesn't make sense to me. Has anyone encountered this? Is it possible he is right? Any solutions?

[Alan.uk]

He may be trying to fit them without the dust sheilds bracket. These fit between the caliper and the traililng arm. Without it, it off centre the caliper. Just a thought!








HTH

Alan

[chicagobreezz]

Thanks Alan!

Great pics for my reference. I will be meeting with my mechanic Monday and will ask about the bracket. I forgot to mention he is telling me that the rear rotor thickness is measuring 20.4 mm. The first thing I am going to do is measure myself. That's not any thickness I've ever seen for Porsche. If anyone else has any ideas let me know. Thanks.

[davep]

20.4 is definitely too thick for a rotor. In this case they may have to be machined to the correct thickness first.

[chicagobreezz]

I believe the correct thickness is 20.0 mm. I think there might have been an incorrect measurement.

[PJenkins]

Just out of curiosity...who are you using in Chicago??

Peter

[chicagobreezz]

PM sent local mechanic

[chicagobreezz]

Last "bump" looking for any info on calipers fit before my meeting tomorrow. Thanks again!

[davep]

Were the original calipers rebuilt, or are these exchange calipers?
Do both calipers exhibit the problem? Are the pistons fully retracted?
Are the brake rotors new? Brand? If they are 20.4 mm thick, that is not correct.
Are the brake pads correct for the application? Sometimes pads are mislabelled.
Even a combination of new pads and rotor must have a little operating clearance.

[Neunelfer]

Calipers are his original calipers.

Pads are Pagids. I've never seen a better fitting pad than a Pagid. They are "for sure" the correct pads for this caliper. I installed them.

On that note; I installed the entire front end onto my 914-6/GT project yesterday. S-Calipers, Pagid Pads, Koni struts (without the shield spacers) and everything fit fine. Tight? Yes. As it should be. The pads will bed in withint a few miles. The only difference I had on my car is the Brembo Sport rotors.

The SC pads are 4mm thinner per pad. I've sent Mike detailed pictures of the pads, my calipers and the complete system on my car. I'm baffled as to why the shop couldn't install them. I'm also baffled as to why they wouldn't simply shave the pads vs. install a mis-matched pair, or worse yet, the wrong pair.

Mike... keep me posted on the outcome. They did mention the inner piston/pad set-up on the phone so, it could be the dust shield spacer thickness is an issue with these rotors vs. my Brembo's.