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Front brake disk washers

  #1  
Old 03-14-2018, 05:16 PM
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Default Front brake disk washers



Hi, in a bit of a pickle! Has anyone refitted their front disks without these washers between the rim and the disks ? In other words how big of a difference will it make.. lost one of them and was thinking about just skippin them all together.
 
  #2  
Old 03-14-2018, 07:11 PM
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You need them, all 12 of 'em...don't ask why, just replace them if lost.

https://www.partzilla.com/product/honda/45128-ME2-003
 
  #3  
Old 03-15-2018, 11:48 AM
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If Mr Honda put them there, they are undoubtedly required. No compromise in the braking dept for me.
 
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Old 03-15-2018, 07:52 PM
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Might add that the center of the one on the right in the above pic looks a bit eccentric. I'd be replacing that one as well, and looking carefully at the rest. Make sure the discs are properly torqued when reinstalling 'em (clean the grunge off of the old washers or your torque specs won't be accurate).
 
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Old 03-15-2018, 11:30 PM
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Originally Posted by wes 17 View Post
If Mr Honda put them there, they are undoubtedly required. No compromise in the braking dept for me.
I would have to disagree with this statement. Quite a few people dont reuse the paper washers. Either they lose a couple and dont want to spend the money or dont understand why they're there in the first place. I would either use them all or none at all. I have heard they are there as noise reducer for the disc.
 
  #6  
Old 03-16-2018, 10:38 AM
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These washers aren’t just bits of paper are they ?

Mr Honda obviously developed and worked out the correct bolt arrangement and pressure distribution for our brakes, but if he possibly decided that vibration, temperature variations and other factors could have a NOT meaningless effect on the possible torque settings of bolts in that area, and
he then decided to use washers then who am I to argue.
I don’t know exactly why he wanted them but he did, and I wouldn’t waste my time trying to second guess in this situation.




I can understand a little of the argument to not bother with them but can’t understand at all the swerving of the minor cost of just replacing the lot and putting it back together as designed.
Just my thoughts.
 

Last edited by wes 17; 03-16-2018 at 12:10 PM.
  #7  
Old 03-16-2018, 09:44 PM
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OK...let's end this.

The washers are there to center the disc in the caliper. Without it, the disc is being forced out of its proper plane of orientation whenever the brake is applied, resulting in significantly reduced braking force and majorly uneven brake pad wear. It also helps reduce heat transfer from the disc to the hub.

Do not install the discs without them, and if you have any that are beat-up or worn, replace them.
 
  #8  
Old 03-17-2018, 11:11 AM
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It says in the description, shim, so it's needed for proper spacing as stated above.
I would say that more importantly is that when not installed, you would have a hard surface mounted to another hard surface and when the brake is applied, it would sing.
Those things are cheap enough so replace them with new. You have done so much work on the wheel so far so don't cheap out, install new.
 
  #9  
Old 03-17-2018, 11:43 AM
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I read somewhere their main purpose is insulate heat from the hub and to keep the disc from "singing". But to center the rotors in the calipers, no. The calipers float so they will center themselves on the rotors.
 
  #10  
Old 03-17-2018, 06:52 PM
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I'd be concerned that, towards the end of the pad life, that uneven wear of the disc and pads might be an issue without the washers. So yeah, my previous post is likely a bit hyperbolic. Heat transfer & noise is more likely the main reason.
 

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