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PowerStop brakes don't fit

Old 01-11-2019, 09:58 AM
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Travelor
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Default PowerStop brakes don't fit

I purchased a set of PowerStop front and rear brake pads for my 2017 Grand Sport with the two piece rotors. The rear pads went on perfectly but the front pads did not fit - too tall by about 3/8". PowerStop cofirmed the part number and sent a replacement set but these also do not fit. Part number is Z26-1405.

Anyone had this problem and if so, what was your solution?

I can order a set of CarboTech but don't want to run into the same fitment problem.

George
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Old 01-11-2019, 10:11 AM
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Originally Posted by Travelor View Post
I purchased a set of PowerStop front and rear brake pads for my 2017 Grand Sport with the two piece rotors. The rear pads went on perfectly but the front pads did not fit - too tall by about 3/8". PowerStop cofirmed the part number and sent a replacement set but these also do not fit. Part number is Z26-1405.

Anyone had this problem and if so, what was your solution?

I can order a set of CarboTech but don't want to run into the same fitment problem.

George
George, that is the correct part number Carbotech uses the same part number. They may have had a production issue.
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Old 01-11-2019, 10:30 AM
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Some pictures of the “don’t fit” example might help.
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Old 01-11-2019, 11:45 AM
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Mine went right in..... on our '17 GS.... no issues. Do you think possibly someone put the wrong set of pads in the box marked 1405 ?

Z26-1405 front and Z 26-1718 rear.
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Old 01-11-2019, 11:49 AM
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did you buy your GS new?

Pictures of the calipers/rotors and the brake pads next to stock would help tremendously here. Otherwise everyone is just guessing.

If you bought the car used, it sounds like someone may have swapped calipers. If you bought the car new, then the pads have to be the issue. Either way, pics would help everyone to see what's going on.
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Old 01-11-2019, 12:14 PM
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iclick
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I installed mine about two years ago and had no fitment problems. Like others here I suspect your issue is a part packaged in error. Do the pads show the same part number as the box? Like Marcho said, a photo with stock and Z26 together would be a good reference.

Last edited by iclick; 01-11-2019 at 01:51 PM.
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Old 01-11-2019, 02:39 PM
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I have the Z26 pads as well. Slid right in place without any issues. Maybe take some measurements of the pads and contact them directly to confirm dimensions.
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Old 01-11-2019, 03:42 PM
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Two plus years for the Powerstops on my Z-51, slid right in place, no dust, no brown, no problem.
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Old 01-11-2019, 06:43 PM
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Now is your chance to throw em in the trash where they belong!!

LOL - just stoking the fire's for fun gents don't get triggered

They should look like this. GL

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Old 01-12-2019, 07:30 AM
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I picked my car up brand new with 4 miles on it from the local Chevrolet dealer and have changed nothing on the car. When I was at the dealership having the brake pad exchanged the pads coming off were Brembo. As I needed to get the car home we reinstalled the front factory pads so at present I don't have a pad to give the dimensions. Should have written down the info printed on the Brembo front pads but did not thing of it at the time. I will try to get a friend to help me lift the car and get the dimensions next week.I went to a suggested kink and sure enough the the dimension for a spec brake pad is 7.46" and that is the dimension that is causing the pad to not fit into the caliper as far as I can tell as the pads would not fit into the caliper to see if anything else did not fit. I was standing next to the shop foremen with this was being done. I did see the dimension I was calling too tall is actually the width.T
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Old 01-12-2019, 02:35 PM
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Travelor, have you made sure the pistons are pushed back out of the way. They may be out just enough to keep the new ones from setting all the way down. Just a thought.
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Old 01-18-2019, 09:53 AM
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Guys, here is the answer, if you want to call it that: First I texted with PowerStop and they sent a replacement set of pads - still don't fit. Then I texted with CarboTech and found that their brakes and the industry standard are the same size as the PowerStop sets, I then texted the GM help line and they bounced me back to my local dealer with no advise at all.

I have total trust with my local dealer, so I called them and explained what I had done and asked for help. The dealer made calls to Chevrolet and came up with no real answer. I'm going to have the Brembo rear pads put back n the rear and hope and pray I NEVER need to put pads on the car as the industry standard pads DO NOT FT my Corvette GS.

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Old 01-18-2019, 09:58 AM
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Totally weird. Did someone swap out your brake calipers? ie brakes were modded?

Last edited by Zjoe6; 01-18-2019 at 09:58 AM.
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Old 01-18-2019, 10:06 AM
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Originally Posted by Zjoe6 View Post
Totally weird. Did someone swap out your brake calipers? ie brakes were modded?
that's my guess as well, these must not be stock brakes.

Pictures would really help, is it possible to post? Or you can PM me for my cell phone and text them to me and I'll post them up.
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Old 01-18-2019, 10:08 AM
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he purchased the car new though with 4 miles.... so if these are not stock brakes, then the dealer or someone pulled a fast one.... again, if you can get pics it would help.
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Old 01-18-2019, 10:16 AM
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do your brakes look like this (Iron rotors):



Or like this (Carbon brakes):


I know you mentioned two piece rotor... so if yours look like the iron rotors above, does your caliper look the same as what is in the pic?

Last edited by Marcho Polo; 01-18-2019 at 10:17 AM.
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Old 01-18-2019, 10:30 AM
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Hey Travelor - Im seeing several folks here trying to help you and many have been asking for a picture of your setup... You've received alot of great information here, but if your not willing to post a picture of your setup, then Im not sure how anyone can help you.

POST A PICTURE OF YOUR BRAKES AND ROTOR setup (up close like Marcho Polo did)...

To post a picture - click the little square next to the smile face, then browse your PC to where the picture is, click on UPLOAD (upper right hand corner) and give it time to get to 100%.


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Old 01-18-2019, 10:38 AM
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First, thank everyone for your thoughts and time to help/

Can't provide picture and car is on the ground and I have no way of lifting and showing brake pad comparison. BUT THAT WOULD BE A GREAT IDEA. When I take my car in to have the rear pads reinstalled I'll try to get pictures.

My brakes look exactly like the iron two piece rotors with what appears to be the identical calipers only mine are red from the factory.
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Old 01-18-2019, 11:42 PM
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Old 01-19-2019, 02:47 AM
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Below are pics comparing the rear OEM Brembo pads from my 2019 GS with a brand new set of Carbotech XP10 pads. The OEM Brembo pads have 150 or so miles on them...basically brand new. You'll note the Powerstop box part number matches the Carbotech part number ("1718"). I use Powerstop on the street and the Carbotech for the track.

The fronts match equally well.

Sorry to say but you either need a new mechanic, you have the wrong pads, or you (or your mechanic) don't know what brakes you have on the car. As many have requested, pics help...even if they're just the pics of the calipers and rotors so people see that yes.....you really have the iron brakes.


Rear pad part numbers....Powerstop vs Carbotech

Thickness

Overall shape and size

Friction Surface
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