GrandAmGT.com Forum
http://www.pfyc.com GrandAmGT.com Premium Memership Signup
RotorsOnline.com   

Go Back   GrandAmGT.com Forum > GAGT - Technical - Sponsored by www.MilzyMotorSports.com > Technical Q&A

Reply
 
Thread Tools Display Modes
Old 08-15-2011, 01:01 PM   #1
FuriousG
Nürburgring Driven!
 
FuriousG's Avatar
 
AKA: Isaiah
Join Date: Oct 2004
Location: Plumas Lake, CA
Age: 39
Posts: 934
Vehicle: '03 GAGT / '09 G8 GXP
FuriousG Gettin' there
Corvette Calipers

I apologize in advance for the long read but I could really use some help here.

I bought some Corvette calipers off a member here recently but I'm having some problems getting them installed. I'm not sure if they are in good condition since the brackets that came with them both had a rusted caliper pin (one of which sheered off completely inside the bracket.) I bought new brackets , pins and brake pads prior to installing but now I'm still having issues.

I put the brakes together on Saturday and drove it home. There was a grinding noise that I assumed would go away after the new pads wore into the used rotors. The noise dulled down while driving but I think that's due to the pads heating up too much and providing less friction. I drove the car to church on Sunday and the grinding was still there by the time I got home. I also noticed a bit of a stutter when braking and assumed maybe one of the rotors was slightly warped. Because of this, I bought new rotors today. When I everything apart tonight, I found that the pads on the driver's side have worn down about 50% in just two days. Definitely something wrong and probably not due to the rotors.

Today, I tested things out while I had the car up on jackstands so that I could run the front tires freely. The brakes still grind (on both sides) and all I can figure is that the calipers simply aren't releasing enough pressure to let the pads lift off the rotors. I even put the wheels back on to guarantee that the rotors were firmly pressed against the hub but the pads still won't fully release from the rotor when the brake pedal is released. (I already checked the dust shields and ensured that they are not touching the rotors.)

In the end, I put the original calipers back on but the car is undrivable thanks to a corroded bleeder valve that prompted the change in the first place. I can get a set of used calipers tomorrow but I'd really like to put the Corvette ones back on if anyone can tell me what's wrong. Here's my parts list:

Corvette calipers (bought used)
Camaro brackets and pins (all new)
Impala rotors (old set of drilled slotted or brand new "plain" rotors)
Camaro brake pads (came with hardware but I don't think I used it)
Corvette Caliper hardware kit (new anti-rattle clip and slides)

Basically, the only old parts are the calipers so I'm leaning towards them. What are the odds that they would be the primary cause of the grinding and what can be done if they are?
__________________
2003 GAGT: CAI, SLP Catback, DHP ECM, 18" ASA JH9 Rims, Eibachs, Corvette Z06 Brakes, Front/Rear STBs, Debadged, Dual Post Mirrors, Projector Headlights, Tinted Tails, Fogs, 3rd Brake & Reverse Lights

2009 G8 GXP: #1233 out of 1829 - SOLO Axlebacks, VCM OTR Intake

Last edited by FuriousG; 08-15-2011 at 01:47 PM.
FuriousG is offline   Reply With Quote
Old 08-15-2011, 01:15 PM   #2
hahano404
Guest
 
Posts: n/a
other than slides still bein effed.. the cal pistons sound like the culprit
  Reply With Quote
Old 08-15-2011, 01:37 PM   #3
FuriousG
Nürburgring Driven!
 
FuriousG's Avatar
 
AKA: Isaiah
Join Date: Oct 2004
Location: Plumas Lake, CA
Age: 39
Posts: 934
Vehicle: '03 GAGT / '09 G8 GXP
FuriousG Gettin' there
I don't know how long the calipers were off of the other guy's car but it's possible some debris got inside the system through the rear. I am able to push the pistons in myself with enough force and the travel feels smooth but who knows?

The only thing I changed from this install thread (HOW-TO Install Corvette brakes on a 99+ GA) was that I may have used Camaro anti-rattle hardware instead of Corvette. Anyone know if they are different and if that might be the problem?
__________________
2003 GAGT: CAI, SLP Catback, DHP ECM, 18" ASA JH9 Rims, Eibachs, Corvette Z06 Brakes, Front/Rear STBs, Debadged, Dual Post Mirrors, Projector Headlights, Tinted Tails, Fogs, 3rd Brake & Reverse Lights

2009 G8 GXP: #1233 out of 1829 - SOLO Axlebacks, VCM OTR Intake

Last edited by FuriousG; 08-15-2011 at 01:53 PM.
FuriousG is offline   Reply With Quote
Old 08-15-2011, 01:51 PM   #4
FuriousG
Nürburgring Driven!
 
FuriousG's Avatar
 
AKA: Isaiah
Join Date: Oct 2004
Location: Plumas Lake, CA
Age: 39
Posts: 934
Vehicle: '03 GAGT / '09 G8 GXP
FuriousG Gettin' there
I may have found my problem after reading deeper into the thread I linked. This quote: "Also FYI use the Corvette anti rattle clip on the Caliper.. Use the Camaro clips on the bracket..." may be my problem since I think I used the Corvette hardware kit for the anti-rattle and the brackets. Maybe they are holding my pads too tightly and causing the grinding. Looks like I have something to try tomorrow...
__________________
2003 GAGT: CAI, SLP Catback, DHP ECM, 18" ASA JH9 Rims, Eibachs, Corvette Z06 Brakes, Front/Rear STBs, Debadged, Dual Post Mirrors, Projector Headlights, Tinted Tails, Fogs, 3rd Brake & Reverse Lights

2009 G8 GXP: #1233 out of 1829 - SOLO Axlebacks, VCM OTR Intake
FuriousG is offline   Reply With Quote
Old 08-15-2011, 02:45 PM   #5
AaronGTR
BlingWithBallz
 
AaronGTR's Avatar
 
AKA: Aaron
Join Date: Aug 2002
Location: Detroit area, MI
Age: 39
Posts: 12,197
Vehicle: 2000 Grand Am GT1 2dr
AaronGTR has made plenty of valid pointsAaronGTR has made plenty of valid points
Anti-rattle clips don't make enough pressure to wear a pad half way through in 2 days. Either your slider bolts are sticking, or you have a bad caliper piston(s) that isn't returning and keeping pressure on the pads. Probably what shot your rotors too.
__________________
The few, the proud, the boosted!
13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011)
See it here. the total package.
AaronGTR is offline   Reply With Quote
Old 08-15-2011, 10:18 PM   #6
FuriousG
Nürburgring Driven!
 
FuriousG's Avatar
 
AKA: Isaiah
Join Date: Oct 2004
Location: Plumas Lake, CA
Age: 39
Posts: 934
Vehicle: '03 GAGT / '09 G8 GXP
FuriousG Gettin' there
The slider bolts and brackets are brand new and move easily. All that's left is the calipers themselves. So basically I spent $400 on used parts and can't use any of them... Would have been cheaper to buy all brand new parts at this rate since I've already replaced everything but the calipers. This blows...
__________________
2003 GAGT: CAI, SLP Catback, DHP ECM, 18" ASA JH9 Rims, Eibachs, Corvette Z06 Brakes, Front/Rear STBs, Debadged, Dual Post Mirrors, Projector Headlights, Tinted Tails, Fogs, 3rd Brake & Reverse Lights

2009 G8 GXP: #1233 out of 1829 - SOLO Axlebacks, VCM OTR Intake
FuriousG is offline   Reply With Quote
Old 08-16-2011, 07:26 AM   #7
hahano404
Guest
 
Posts: n/a
probably can try to rebuild them ur self. worth a shot since u spent the money on them.
alum calipers may not be able to get kits though.... oddly since all calipers are basically remans ne ways
  Reply With Quote
Old 08-16-2011, 12:20 PM   #8
FuriousG
Nürburgring Driven!
 
FuriousG's Avatar
 
AKA: Isaiah
Join Date: Oct 2004
Location: Plumas Lake, CA
Age: 39
Posts: 934
Vehicle: '03 GAGT / '09 G8 GXP
FuriousG Gettin' there
Well, the bracket clips were a part of the problem. The Camaro ones allow the pads to slide much better than the Corvette clips. This cleared up the passenger side but unfortunately, the driver's side is still too tight and I think it's the caliper itself. I managed to pick up a junked set of calipers so that I could put the car back to stock at least.
__________________
2003 GAGT: CAI, SLP Catback, DHP ECM, 18" ASA JH9 Rims, Eibachs, Corvette Z06 Brakes, Front/Rear STBs, Debadged, Dual Post Mirrors, Projector Headlights, Tinted Tails, Fogs, 3rd Brake & Reverse Lights

2009 G8 GXP: #1233 out of 1829 - SOLO Axlebacks, VCM OTR Intake
FuriousG is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:29 PM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2011 GrandAmGT.com
RotorsOnline.com