Turbodan

when changing rear pads on a 993 do you always change the disks as well? A shop told me that they always do this. not sure if has to do with their profits or other. I understand if the disks are too thin but otherwise I would've thought just change the pads.

Texas993

No need to replace rotors unless the don't meet minimum thickness. The thickness Min is stamped on the rotor.

On my former 993TT, I replaced the rotors at 80k + miles. It all depends on what kind of driving you do.

Jason @ Paragon Products

The shop is being conservative which is understandable as they don't want comebacks. Assuming the discs are well above minimum, don't have cracking so they will need replacing soon and they aren't heavily grooved, you can just install new pads. Lots of issues to consider there.

il pirata

A shop changing rotors every time you change pads on a 993…I would use a different word than conservative.

stubble88

I just swapped my pads out. So very easy. Ran my fingers accross the rotors to feel for any grooves.

Toddster

I was told by a pretty respected shop that if you don't change the rotors they tend to squeal
Did not put it to the test, last time they did change out the rotors automatically
Next time I will take a chance and just do pads

Kein_Ersatz

Typical 2 sets of pads to one rotor on service intervals, YMMV.

Rear Rotor replacement is an basic (DIY level) job, time vs money vs risk of squeal (from rotors or your wallet, your call).

kjr914

Since doing a full OE pads/rotor change when I bought the car, I've run through 2 full sets of OE/OEM pads (on 3rd set now). Caliper measurements show that I've gone though 1mm of the 2mm allowed wear. I use it for street, AX and a few DE events. I was shocked at the remaining rotor thickness. The calipers I used can't get into the depths of any grooves, so there is probably a bit more wear if you really consider the full depth of the grooves, maybe 0.25-0.5mm. No cracking yet on the cross-drilled holes so I'm not worried at all. I'll double check when i next get ready to change pads and maybe then order new ones.

And....I HATE brake squeal. I have not had any issues. Lots of good hard use, an occasional "Italian brake job" if they start to hint at squeal, and blowing out the calipers with the high pressure water sprayer at the car wash occasionally. I run the spiders attached to a backing plate that was pried off a pad. These are left in the caliper and and I put in new pads after peeling off the backing plate. This simplifies the pad removal. No special tricks to mitigate squeal.

So, rotors every pad change? Heck no. What a waste.

On the flip side:
So.......if you run a shop, I understand why you do this. Shops don't want bring-backs, not just due to the time involved and affects on reputation, but its what their customers demand! I mean who wants to take their car back to the shop multiple times to save a few dollars? Customers "just want it fixed", so you give them a bulletproof solution. And yes, that costs a bit more...such is life.

HiWind

+993 on that ... criminal sounds about right .. is it the shop that sells you new wheels when you need air for tires too?

race911

I take it you've run a shop here in the US, where customers bitch about every perceived slight. Everything from "my clutch feels funny now" when all you've done is an alignment to "this stain wasn't on the carpet when I left it here."

Absolutely freaking pointless to deal Porsche owners anymore.

HiWind

Lol Ken ... My shop just tells me to stop fussing and enjoy the car
but I'm not experienced in your customer is always right/more moans are my constitutional right world so I apologies

_snowbird_

On a related topic - does anyone ever replace just the rotor portion of the 2-piece front brakes and re-use the hats?

Edward

On your average transportation device, folks who get a pad replacement are always told they need their rotors turned (i.e. milled true/square). And they do this for the simplest reason: liability. If feces hits the fan (or you have "that guy" as a customer), the shop has to be able to prove that it did all that was "reasonable practice" and "prudent" for a proper job, particularly with a job involving something as safety-critical as brakes. Anything short of this and they open themselves up to serious liability, even if rotors are in spec. As a guy who has serviced more brakes that I can remember over these several decades for friends and family yada yada, I have never had rotors turned and never had a single issue, ever. I run em till spec, then replace em if need be. And I always caution folks to go easy on pads for a bit since they need to "bed in." ...another reason shops want to turn rotors, btw, is bedding in on a newly-squared surface is nearly immediate as opposed to just slapping on new pads.

So do you need to replace rotors? Measure ...there's the answer ...and don't turn 993 rotors ever, as a side note. What shops have to do is different from what you can do safely and prudently. And FWIW, I've gotten serious life from my rotors with OE Textar pads.

Edward

bruce7

Me too, I just changed my front rotors at 114k miles. The rear rotors
are only half worn.

-bruce

NYC993

Pretty sure you can't. They are not true floaters like Giro disks.