Wrong Rotor Size Fix? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > Wrong Rotor Size Fix?

XHD Heavy-Duty Hood Latches for JK and TJ available at OcoStainless Steel Door Hinge PinsPoly Door Hinge Bushings

Reply
Unread 09-12-2009, 12:06 AM   #1
efr523
Registered User
 
Join Date: Nov 2006
Location: Texas
Posts: 6
Wrong Rotor Size Fix?

I have a 2001 tj sport and I just ordered some new rotors to do a brake job. I found out about the rotor size change a little late and ended up getting the rotors that are 1/8" deeper than i need. I was thinking about taking my cutting torch and cutting the middle out of my old rotors to make essentially about a 1/4" spacer and putting them on the inside of the new rotors to fill up the extra space so the wheel wont seize up. I got a really good deal on some drilled and slotted rotors and don't want to go through the hassle of returning them and ordering new ones. Can anyone see anything potentially harmful by doing this?

efr523 is offline   Reply With Quote
Unread 09-12-2009, 02:16 AM   #2
Boodyrider
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2008
Location: Maryland
Posts: 2,519
What, other than dying? Nope, go for it.

No **** with the brakes to save on returning the wrong parts dude, you could break studs and kill someone.

Hey, swap in the matching unit bearings!!!


Seriously... send back the wrong, get the right. It's not JUST the depth, the other concern is real. Also, spacing like that will likely cause the calipers to hit on the other side.
__________________
97 TJ Sport - 4.0/HP D30 w ARB/8.8 w LS/4.88s; 35s and flat fenders on 2.5 lift

84 CJ7; frame off restoration in progress.

The technical advice you get from me here is worth exactly what you paid me for it. Warranty issues will be reimbursed at double what you paid me for the advice.

Last edited by rustywrangler; 09-12-2009 at 08:31 AM.. Reason: Language problem, this is your warning.
Boodyrider is offline   Reply With Quote
Unread 09-12-2009, 03:05 AM   #3
TheBoogieman
Demonic Jeep Freak!
 
TheBoogieman's Avatar
1998 TJ Wrangler 
 
Join Date: Aug 2006
Location: Charlottesville, Va
Posts: 27,711
Return them and drilled rotors don't help on Jeeps.
__________________
Quote:
When I had 3.07s I would draft behind birds as an attempt to do the speed limit.
Quote:
Originally Posted by Jeepsr4me View Post
Yeap its your nuts that giving you the trouble here...... Get the right ones
TheBoogieman is offline   Reply With Quote
Unread 09-12-2009, 03:32 AM   #4
Boodyrider
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2008
Location: Maryland
Posts: 2,519
Here's a thought, return them and buy decent blanks. Interestingly enough, Autostoned blanks (Duralast 'brand') are pretty good ones.
__________________
97 TJ Sport - 4.0/HP D30 w ARB/8.8 w LS/4.88s; 35s and flat fenders on 2.5 lift

84 CJ7; frame off restoration in progress.

The technical advice you get from me here is worth exactly what you paid me for it. Warranty issues will be reimbursed at double what you paid me for the advice.
Boodyrider is offline   Reply With Quote
Unread 09-12-2009, 07:13 AM   #5
Divinitous
Disgruntled Jeepforum'er
 
Divinitous's Avatar
2000 TJ Wrangler 
 
Join Date: Oct 2005
Location: NY/NJ/PA Tri-State Middletown NY 10941, New York
Posts: 3,186
You people are interfering with Darwins work.
__________________
-Ryan
Google Voice (or the number Grape calls when drunk): 845-476-8182

Quote:
Originally Posted by Enzo Ferrari
"The Jeep is Americas only real sports car!"
Quote:
Originally Posted by MrBlaine
"Jeeps do not make jeepers, jeepers make Jeeps."
Divinitous is offline   Reply With Quote
Unread 09-12-2009, 08:42 AM   #6
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,600
Quote:
Originally Posted by efr523 View Post
I have a 2001 tj sport and I just ordered some new rotors to do a brake job. I found out about the rotor size change a little late and ended up getting the rotors that are 1/8" deeper than i need. I was thinking about taking my cutting torch and cutting the middle out of my old rotors to make essentially about a 1/4" spacer and putting them on the inside of the new rotors to fill up the extra space so the wheel wont seize up. I got a really good deal on some drilled and slotted rotors and don't want to go through the hassle of returning them and ordering new ones. Can anyone see anything potentially harmful by doing this?
As greatly as you need a severe amount of abuse for considering such a bad idea, there is a very real problem that you will encounter. It's critical to the function of the brake system that your rotor register perfectly on the pilot that sticks out of the unitbearing. If you examine that pilot carefully, you will find there are two different diameters to it with the larger one next to the flange for the rotor and just outside of that, another diameter for the OEM wheel to register on.

If you space the rotor outwards, it won't register correctly and can cause some issues you may not enjoy.

Just to satisfy my curiosity, but how long did you power through the grinding before you figured it out?
__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 09-12-2009, 01:12 PM   #7
efr523
Registered User
 
Join Date: Nov 2006
Location: Texas
Posts: 6
to satisfy your curiosity 0 seconds i have not done this
efr523 is offline   Reply With Quote
Unread 09-12-2009, 01:25 PM   #8
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,600
Quote:
Originally Posted by efr523 View Post
to satisfy your curiosity 0 seconds i have not done this
Well, if you haven't run the rotors, take them back and swap them for the correct versions.
__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 09-14-2009, 07:28 PM   #9
SHAKEnBLAKE
Registered User
1998 TJ Wrangler 
 
Join Date: Feb 2008
Location: Columbus, Ohio
Posts: 1,360
I had this same problem today, but I did not think about grinding anything and I called autozone and advance and they weren't picking up each others' part numbers, but both of them had rotors that would rub on the backing plate. They were sure that I had a freak jeep, or "maybe they used parts from the next model year"
but 97 and 99 jeeps had the same part number in their system. This month has been a 100% you get what you pay for kinda month.
__________________
Ohio4x4.com
SHAKEnBLAKE is offline   Reply With Quote
Unread 09-14-2009, 07:47 PM   #10
funshootin1
Registered User
1998 TJ Wrangler 
 
Join Date: Jul 2009
Location: philadelphia, Pennsylvania
Posts: 724
Ive got some cross drilled brake lines if you need em. ha
funshootin1 is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.