Why do the Japanese do this with rotors?

crabu2

PSL +5
Intermediate User
Joined
Aug 11, 2017
Messages
1,202
Reaction score
1,094
Location
DelMarVa
I noticed this years ago.. The Japanese cars I've done brake work on always have a threaded hole in the rotor to make removal very easy. American cars.... not so much. Why don't all manufactures do this?

I'm asking because just today.. I replaced the rear rotors on my Camry, which has almost 300K miles on the original factory rotors.. Pulling the old rotors were easy as can be by using 2 M8-1.25 bolts. When I did rotors in my Expedition years ago, I had to use a sawzall on one side to get it off..

BTW, I lost a lug nut! I have no idea where it went.. I had them all sitting together in a box.. but one disappeared.. I'm just really baffled as to where it disappeared to...
 

johnboy00

Geaux Tigers!
Premium Plus
Lifetime Premium
Advanced User
Software Developer
Joined
Sep 6, 2016
Messages
5,072
Reaction score
11,924
I've never, ever had a problem getting a rotor off any of my American cars. If it doesn't come right off, a heavy mallet always does the trick.
 

crabu2

PSL +5
Intermediate User
Joined
Aug 11, 2017
Messages
1,202
Reaction score
1,094
Location
DelMarVa
I've never, ever had a problem getting a rotor off any of my American cars. If it doesn't come right off, a heavy mallet always does the trick.

Maybe because they don't use road salt in the winters in NC? Up here, it seems everyone has problems getting rotors and hubs off... That Expedition was the worst I've ever had to deal with. In the past, I've always been able to get rotors off with a mull and some pb blaster.. But that Expy... I tried soaking it in pb blaster for more than 24 hours. used some bolts and the Power steering to try and break it loose....heat, and hammer the crap out of it.. one side came off, but the other side, I only got it off by cutting it off.
 

rider9195

Premium Plus
Lifetime Premium
Advanced User
Joined
Jul 29, 2013
Messages
1,332
Reaction score
1,664
Age
25
Location
Ulster County, NY
More "American" cars have them than you would think. Here in the rust belt it is hit and miss with that threaded hole helping pull the rotor off. Sometimes it is great. Other times you can barely start a bolt and if you can the rotor is so rusted on it just strips the hole out.

A lot of HD trucks have them on the rear brakes. I'd take a set of full floating rear end brakes any day, they're super easy and rust doesn't make much difference on them.

Sent from my SM-G950U using Tapatalk
 

OBeerWANKenobi

This is not the car you're looking for......
ModSec
Premium Plus
Lifetime Premium
Corgi Lovers
Advanced User
Joined
Mar 20, 2018
Messages
7,089
Reaction score
20,611
Location
Outer Rim - Hiding from 35.5 I/O
I've actually ran into some that had tapped jack screw holes but I still couldn't get them off. I actually stripped out the threads. LOL

This is why that I apply "Never Seez" to the ID of the rotor and hub contact face while doing my brakes. I use that stuff on all kinds of nuts and bolts as well under the vehicles if I ever want to get them off again.
 

omgboost

Left Lane Hog
Premium Plus
Lifetime Premium
Advanced User
Joined
Oct 27, 2014
Messages
3,270
Reaction score
4,424
Location
Forced Induction Land
I've actually ran into some that had tapped jack screw holes but I still couldn't get them off. I actually stripped out the threads. LOL

This is why that I apply "Never Seez" to the ID of the rotor and hub contact face while doing my brakes. I use that stuff on all kinds of nuts and bolts as well under the vehicles if I ever want to get them off again.
Never heard of that. I use permatex anti sieze. My BMW has the screw too
 

OBeerWANKenobi

This is not the car you're looking for......
ModSec
Premium Plus
Lifetime Premium
Corgi Lovers
Advanced User
Joined
Mar 20, 2018
Messages
7,089
Reaction score
20,611
Location
Outer Rim - Hiding from 35.5 I/O
Never heard of that. I use permatex anti sieze. My BMW has the screw too
I think it's basically the same stuff but a different brand. I was introduced to "never seez" first so I just call everything "never seez". I'm pretty sure the stuff I actually have on my shelf in my shop is Permatex so it's actually anti-seize.

It's kind of like how every tissue is a Kleenex. ;)
 

bentvalve3g

PSL +5
Intermediate User
Joined
Dec 18, 2018
Messages
207
Reaction score
278
Location
Washington
That Expedition was the worst I've ever had to deal with.
We had an Expedition when I was growing up in Wisconsin (salt heaven). My dad was fighting with disc removal and somebody suggested he make a "pusher" to help the disc off the hub. Basically it was threading a lag bolt through each caliper mounting screw from the backside and tightening each incrementally. Worked for one side, cracked and broke the other disc...anyway, use anti seize/never seize like OBeer said but it sounds like you've already completed the job!
 

CobawLT2010

Land of the quarantined, home of the afraid.
Premium Plus
Lifetime Premium
Advanced User
Joined
Oct 26, 2011
Messages
8,137
Reaction score
5,125
Location
Wuhan, China
I replace the rotors every other brake job. Not because they are rusty but usually they are warped by then. Never had issues with my merican cars.
 

Andrew21

"All Blade, All The Time" RDForum Owner
Administrator
Premium Plus
Lifetime Premium
Corgi Lovers
Advanced User
Joined
Oct 31, 2010
Messages
8,955
Reaction score
8,465
Location
Long Island
Everytime I change rotors on any car, I slather this copper anti-seize stuff all over the face of the inner hub. Makes it so much easier for the rotor to come off next time. It does work though :)
 

HaloInReverse

Learning to Fly
Premium Plus
Lifetime Premium
Beginner User
Joined
Jun 7, 2017
Messages
130
Reaction score
119
Location
Vegas
Been wrenching on VW's & Audi's for the past 20 years. Every brake job I've done has a set screw to secure the rotor to the hub.

While it does make life easier, it's a total PITA when that screw is either seized or decides to break.
 

CobawLT2010

Land of the quarantined, home of the afraid.
Premium Plus
Lifetime Premium
Advanced User
Joined
Oct 26, 2011
Messages
8,137
Reaction score
5,125
Location
Wuhan, China
Been wrenching on VW's & Audi's for the past 20 years. Every brake job I've done has a set screw to secure the rotor to the hub.

While it does make life easier, it's a total PITA when that screw is either seized or decides to break.

Lol just looked it up (I’ve never worked on VW or Oudies). Of course it would be torques... leave it to the Germans.
 

ShadowTrooper

First Guard
ModSec
Premium Plus
Lifetime Premium
Advanced User
Joined
Jul 5, 2013
Messages
2,142
Reaction score
2,591
Location
Somewhere Cold
Never really had an issue getting rotors off between Michigan and Florida. Worked a bunch at Nissan development and I, nor anyone else there, actually used those holes for removal.
 

CPB

Left Lane for Passing Only
Advanced User
Joined
May 26, 2017
Messages
1,084
Reaction score
1,533
Location
Louisiana
Why do the Japanese do this with rotors?
Because they work smarter not harder?
Post automatically merged:
Been wrenching on VW's & Audi's for the past 20 years. Every brake job I've done has a set screw to secure the rotor to the hub.

While it does make life easier, it's a total PITA when that screw is either seized or decides to break.
I always hit them with a deadblow and an impact screwdriver now.
 

auskip07

Premium Plus
Lifetime Premium
Advanced User
Joined
Feb 5, 2019
Messages
1,062
Reaction score
1,644
ive had the opposite effect.. ive drilled out a few of those screws because after a while the screw metal gets soft after so many heat cycles the phillips head strips out. on american cars i usually do what johnboy does and use a rubber mallet or my small sledge hammer if im replacing them (i usually replace them)

The screws are not necessary. the wheel and lugs do a good job holding the rotors on when it matters.

in the south unless you park in the grass your car is generally rust free for 15 years. after that its surface rust.
 
Last edited:

Bloovy One

"Today didn't have to end in eels"
Premium Plus
Lifetime Premium
Corgi Lovers
Advanced User
Joined
Feb 8, 2016
Messages
7,142
Reaction score
16,020
Location
Western NC
My Wife had an Expedition with rotors that were stuck. Seems to be a common issue on those.

Our Honda's both came with the screw for holding on the rotor during factory assembly. I drilled them out within 5,000 miles on both. They were already stuck.:)
 

Discord Server

Latest threads

Latest posts

Forum statistics

Threads
90,767
Messages
1,381,415
Members
22,825
Latest member
McSleepy
Top