SAAC Forum

The Cars => 1968 Shelby GT350/500/500KR => Topic started by: Corey Bowcutt on July 09, 2018, 01:18:12 PM

Title: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 09, 2018, 01:18:12 PM
I have had a rattle in my front end since I bought my car.  I hear it when going slow over bumps.  I noticed that when I applied the brakes the rattle would go away.  I finally found out what is causing it.  There is a pin in the brake caliper that goes thru a hole.  The hole is much larger than the pin.  This allows the caliper to vibrate around the pin and cause the rattle.  It looks to me like the PO had gooped up the hole at some point to eliminate this rattle but the goop (probably some sort of epoxy?) has since broken down.  From the pictures can anyone give me guidance as to what is wrong.  Seems to me either this pin or the caliper is incorrect or it is missing something?  Can anyone shed any light on this for me?
(http://www.saacforum.com/gallery/483-070718104909.jpeg)
(http://www.saacforum.com/gallery/483-070718104951.jpeg)
(http://www.saacforum.com/gallery/483-070718105024.jpeg)
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Coralsnake on July 09, 2018, 01:38:31 PM
It appears the brake pad pins and pin retainers are missing. Luckily, your brake pads have not fallen off! I suggest getting this addressed before you drive it. The pad retainers are the black clips shown below. They hold the outer brake pad to the calipers


 :P
(http://ssbrakes.com/images/F54519610.jpg)

PS. the caliper is installed incorrectly in this photo. The caliper bleeder is not orientated correctly in the picture (from the internet) should we tell SSBC?

Your car should go faster once you get this repaired
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Dizzy on July 09, 2018, 02:24:39 PM
Looks like the rubber isolators are missing also! The bolts that attach the callipers actually have a long blank end that locates in those isolators allowing the calipes to slide w/o rattling. Get a shop manual and follow the pictures. Also get the hardware kit that will include all those parts.
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 09, 2018, 02:39:21 PM
Guys,

Thank you so much for the help!  Where can I get a "shop manual".  This might be a dumb question but I really have no idea.  Also, any recommendations on where to best get a kit that has all the parts I need?

I see the Black clips in your photo Pete and can easily see I do not have them.  Are the pins part of the brake pad or a separate part?

This is obviously something I need to repair and will but it is not where I actually see the rattle coming from.  It is coming between the pin and the caliper.  I am wondering if the rubber isolator Dizzy is talking about goes there? Unfortunately the picture Pete posted does not show this detail.

Corey
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Coralsnake on July 09, 2018, 02:42:20 PM
The pin goes through the pad and is held by the clip. The outside pad is fixed.

The inside pad is floting so it moves on the pin. The rubber is the sleeve for that pin.

Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Coralsnake on July 09, 2018, 02:43:28 PM
https://www.ebay.com/itm/1968-Mustang-Falcon-Fairlane-Ranchero-Cougar-Comet-Shop-Service-Repair-Manual/332527179723?fits=Year%3A1968%7CModel%3AMustang&hash=item4d6c2a17cb:g:gIgAAOSwXEdaY8OD

Essential for anyone that drives a vintage Mustang
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Coralsnake on July 09, 2018, 02:44:52 PM
Why dont you take a picture of the caliper so we can see the bleeder
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 09, 2018, 02:50:33 PM
Thank you Pete, I just purchased the shop manual you supplied the link to.

The next time I pick up my car I will take pictures of the caliper so you can see the bleeder.

So is there a kit I can buy that has all the hardware in it that I am missing?
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 09, 2018, 04:34:59 PM
OK I found an AMK Brake Caliper Hardware Complete Kit that looks like it has everything I need to correct my problems.  It has the pins and clips and the insulation and a lot more.  So between that and the Shop Manual I just purchased I should be in great shape.  Again thank you Pete and Dizzy for your help. 

This forum ROCKS when it comes to helping us newbies figure our issues out!!!!!!
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Bob Gaines on July 10, 2018, 01:34:33 AM
I have had a rattle in my front end since I bought my car.  I hear it when going slow over bumps.  I noticed that when I applied the brakes the rattle would go away.  I finally found out what is causing it.  There is a pin in the brake caliper that goes thru a hole.  The hole is much larger than the pin.  This allows the caliper to vibrate around the pin and cause the rattle.  It looks to me like the PO had gooped up the hole at some point to eliminate this rattle but the goop (probably some sort of epoxy?) has since broken down.  From the pictures can anyone give me guidance as to what is wrong.  Seems to me either this pin or the caliper is incorrect or it is missing something?  Can anyone shed any light on this for me?

It is not uncommon for the rubber isolator boot to break down and turn into a gooey mess. That is what looks like is happening from the picture besides the other issues. Just thought I would let the PO off the hook because that was not his fault  ;) .
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Steve McDonald Formally known as Mcdonas on July 10, 2018, 05:08:30 PM
Corey, I think I have the "special tool" to install the pins, its a funky looking Pliers looking thing. Let me search for them and I'll let you know
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 10, 2018, 08:11:04 PM
Thank you Steve. Let me know. I am going to try and fix it this weekend.
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Dizzy on July 11, 2018, 07:28:05 AM
Those retainers can be installed w/o using a special tool,but are a pretty strong material and tough on bare fingers. Once you see how they lock into place on the pin it will not be a problem. Also,there should be some lube on the caliper bolts/isolator rubbers. Allows free movement of the calipers once installed. Clean all the rust and dirt from the parts and it will go smooth and be a rewarding project.
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 11, 2018, 07:48:13 AM
Thank you Dizzy.  All great advice and much appreciated.  The huge reward at the end will be the elimination of the rattle.

Corey
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Steve McDonald Formally known as Mcdonas on July 11, 2018, 12:59:36 PM
Thank you Steve. Let me know. I am going to try and fix it this weekend.
Can’t find it in my tool box, but it might be down at Dave’s barn, I’m going there Saturday. I’ll check then
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 11, 2018, 02:36:25 PM
Thanks Steve.
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Corey Bowcutt on July 17, 2018, 07:51:13 AM
I rebuilt the front disc brakes on my GT350 last weekend adding the parts that for some reason were not there.  I also did a complete brake bleeding essentially doing a brake fluid change while I was at it. The rattle is all gone!  It is so nice going over bumps and it not sounding like the front end is falling apart.  Sounds solid as a rock.

Pete you were correct it took a half second off my quarter mile :).

Thanks for all the help!

Corey
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Coralsnake on July 17, 2018, 01:13:14 PM
Im guessingyour calipers are on correctly, since you didnt have any problems bleeding the system. Whoooohooooo
Title: Re: 1968 GT350 Front disk Brake Rattle
Post by: Steve McDonald Formally known as Mcdonas on August 04, 2018, 06:47:05 PM
Corey. I found the pin installation tool
It was fitting in a drawer right in front of me
Here’s what it looks like. Was made by KD Tools