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Nissan Sentra - 2 different caliper bolts? #5417370 04/30/20 01:50 PM
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Fitz98 Offline OP
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I did a pad and rotor change on the front of my 2004 Nissan Sentra 1.8L. Pretty easy and straight forward, but I did find it a little unusual that there were 2 different caliper bolts (one of each on each side).
1 has a rubber insert on the shaft of the slide pin and the other has just a plain steel shaft with a flat surface machined on part of the shaft.
Anyone have any idea why they are different?
Does it matter whether the one with the rubber insert goes on the top or the bottom of the caliper

[Linked Image]

Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417400 04/30/20 02:11 PM
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Trav Offline
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The rubber is a vibration damper, it goes on top from what I can tell. That bottom pin looks like crap, replace it and lube the new one(s) with silicone based lube.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417455 04/30/20 03:04 PM
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Miller88 Offline
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I had to do brake pads on my Subaru and noticed the same thing. The scary thing is I had everything apart when I first got the car and didn't notice that. Oh well.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417474 04/30/20 03:30 PM
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zzyzzx Offline
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I have also seen this before. Not sure if it was a Ford, Toyota, or Dodge though.

Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417495 04/30/20 03:58 PM
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Donald Offline
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Put it back in the hole it was in. Clean out the holes and wipe the pins clean. Any rust or pitting replace. Don't go overboard with Syl-guide grease.

The pin with the rubber sleeve may not slide in easily. I assume between rubber and grease there is air locked at the bottom of the hole. I put the caliper bracket in a vise and slowly use the vise to push in the pin with rubber sleeve.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417502 04/30/20 04:09 PM
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JeffKeryk Offline
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On Hondas the rubber tipped slider goes on the bottom.
The bad one goes in the trash.

Last edited by JeffKeryk; 04/30/20 04:09 PM.

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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417512 04/30/20 04:16 PM
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JTK Offline
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Yeah, the Hondas, Subarus and I thought Nissans I've had, the rubber grommet one went in the lower hole. You probably wouldn't notice the difference if it went in the wrong hole. shocked


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417518 04/30/20 04:20 PM
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Rand Offline
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on my subaru(s) the rubber one is on bottom.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417651 04/30/20 06:54 PM
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ragtoplvr Offline
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If you look at the hole with a strong light you should see witness marks from the rubber.


Rod

Re: Nissan Sentra - 2 different caliper bolts? [Re: JeffKeryk] #5417671 04/30/20 07:22 PM
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hallstevenson Offline
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Originally Posted by Fitz98
Does it matter whether the one with the rubber insert goes on the top or the bottom of the caliper

Yes, it matters (well, sorta). If you want to put it where it belongs, you'll probably need to consult a factory service manual. On '08-'10 Accords, Honda put out a tech document reiterating which position the rubber bushed pin goes because in the wrong position, it was causing excessive brake pad wear.

Originally Posted by Donald
Put it back in the hole it was in.

That presumes it was in the correct position when the OP removed it.

Originally Posted by JeffKeryk
On Hondas the rubber tipped slider goes on the bottom.

That's not correct across the board. I checked for various Hondas we have or have had and it varies across models, if it's the front or rear brakes, etc.

Re: Nissan Sentra - 2 different caliper bolts? [Re: JTK] #5417752 04/30/20 08:43 PM
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Carbuff Offline
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Originally Posted by JTK
Yeah, the Hondas, Subarus and I thought Nissans I've had, the rubber grommet one went in the lower hole. You probably wouldn't notice the difference if it went in the wrong hole. shocked


I mixed up the ones in the rear of our '06 CR-V when the car was one year old.
So, I put the rubber one on the bottom on one side, and on the top, on the other side.

The V has 188,000 miles on it now, still stops fine.
crazy


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5417901 05/01/20 02:55 AM
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Char Baby Offline
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I noticed that when I removed my factory caliper bracket bolts, the rubber grommet was at either the top or the bottom. So, I don't think it matters where they go. They didn't seem to care at the factory where they put'em.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Carbuff] #5418000 05/01/20 07:32 AM
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supton Offline
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Originally Posted by Carbuff
Originally Posted by JTK
Yeah, the Hondas, Subarus and I thought Nissans I've had, the rubber grommet one went in the lower hole. You probably wouldn't notice the difference if it went in the wrong hole. shocked


I mixed up the ones in the rear of our '06 CR-V when the car was one year old.
So, I put the rubber one on the bottom on one side, and on the top, on the other side.

The V has 188,000 miles on it now, still stops fine.
crazy

Trav said it was for vibration dampening, so it's not a critical part of the braking system.

*

IMO this is one of those cases where they should have used a different thread pitch or hole diam, so that it'd be impossible to install wrong. When it matters, just make it impossible to screw up--I get it, ya should go by the manual, but some things are not rocket science, we'd expect to have to RTFM when assembly an engine, but not for a plain jane caliper.

Then again, as Carbuff points out, swapping is probably of little consequence, so shrug


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5418056 05/01/20 09:10 AM
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JeffKeryk Offline
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I suggest referring to the service manual. That's what I did when I mixed 'em up while cleaning the old grease.


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Re: Nissan Sentra - 2 different caliper bolts? [Re: Fitz98] #5418224 05/01/20 12:24 PM
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Fitz98 Offline OP
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I downloaded a manual online.
It does not differentiate between the 2 pins or the location.
I called the dealer and they have the same part number for both pins (22.00 each), which would mean they are both the same.
For lubrication, the manual shows silicone based grease on the shims and rubber grease on both pins. I just used Permatex synthetic green brake grease on all sliding parts.
I think at this point, I will just have to assume the location of the one with the rubber does not matter.
I had the brakes serviced by someone else previously, so no guarantee the position is as it was from the factory.
I did not pay attention to driver's side, so it is a 50/50 chance it is in the same position as removed. The passenger side pin with the rubber sleeve was removed from top and reinstalled in same position.

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