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post #1 of 7 (permalink) Old 02-14-2012, 09:09 PM Thread Starter
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Rear brake pads

Well I was going to treat my car to new rear HPS pads and rotors tonight. Took off the caliper and noticed the original pads still had 1/3 life on both the inner and outer pad with 125xxx miles! These things are as hard as granite which is kinda why I wanted to change them out. One problem though, I ordered HB571F.605 pads which have a spring clip on the backside of the pads. After checking Hawks website I need HB478F.605 with a upper notch and top retaining spring. Guess the pads I have are for 04-05 Mazda3 and I have an 06. Oops. Nothing like getting into the middle of an install and realizing you have the wrong part. Oh well, just have to wait a few days, got the right ones on the way. Just figured I'd post this to maybe save somebody the trouble someday. I saw a couple threads on here and other places about which ones to get but nobody really seemed to know so I'll break it down nice and simple. Don't even need to check your rear brakes.

Rear spring clip = 2004 & 2005
Top Spring clip = 2006-2011
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post #2 of 7 (permalink) Old 02-15-2012, 08:34 AM
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Re: Rear brake pads

I had a similar experience last weekend with not finishing my intended task. I tore the rear brakes apart to install new rotors and HPS pads. My problem was the cylinder. I did everything by the book, took cap off MC, handbrake off. I have a universal tool to twist the cylinder back in but apparently it isn't "universal" enough cuz it didn't fit. So I went at it with needle nose pliers. My problem came when I got to 3-5mm from the piston being flush. It just stopped, same place on both sides. This caused the HPSs not to fit. Looked around the forum for a solution, but didn't find anything...anyone had this happen before and/or know how to solve this problem?

Anyway, wound up throwing the OEM pads back in on my new rotors cuz I was too frustrated to take the bracket off again. I will give it another try in a couple weeks when I switch the brake lines out. Then I'm gonig to have to clean the rotors off.

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post #3 of 7 (permalink) Old 02-15-2012, 11:28 AM Thread Starter
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Re: Rear brake pads

I noticed a lot of guys talking about using needle nose pliers, sticking them in the two little divots on the piston and trying to push/twist it and lock it in place. Sounded like a lot of guys weren't having much success either. The problem with this method is that you simple can't generate enough force to push the piston back. I'm kind of baffled when people say they need to twist the piston while pushing to "lock" it in place. Once the piston is pushed back, it should stay back because there is no hydraulic pressure in the brake system pushing back at that time unless you just pumped the brake pedal. I have a brake piston compressing tool that I have used with great success. It is designed to slip in there and expand and push against the piston and the caliper. A c-clamp could also work in some situations, but it works a little differently by clamping instead of expanding and sometimes there just isn't a good surface to clamp onto or room for it. You never have that problem with this tool and it's specifically designed to do brakes. I took a pic of it.









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post #4 of 7 (permalink) Old 02-15-2012, 01:50 PM
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Re: Rear brake pads

Never seen anything like that, looks like a great tool. Thanks for the advice and pic.

My universal tool has worked great on all the other cars I've done work on. I've never had a problem before with not generating enough force, in fact, most of them I could push the piston back in with just finger pressure (I seem to remember being able to do that on the front pistons). The rear piston went back fairly easily (like normal) but just did not want to go that last 3-5mm. I think next time I will try the C clamp approach, the only clamps I have are 3" or smaller and not big enough for our calipers, gonna need at least a 6".

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post #5 of 7 (permalink) Old 02-16-2012, 01:43 PM
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Re: Rear brake pads

The front pads 2004-2011 Mazda S is HB519.682


However the rear pads are different.

Rear Pads
HB478.605 Rear spring clip for 2004 & 2005
HB571.605 Top Spring clip for 2006-2011

Visit http://www.offlineracing.com/categor.../Mazda/Mazda3/

- Ali

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post #6 of 7 (permalink) Old 02-16-2012, 01:51 PM Thread Starter
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Re: Rear brake pads

[quote author=OffLineRacing link=topic=203656.msg4187624#msg4187624 date=1329417812]
The front pads 2004-2011 Mazda S is HB519.682


However the rear pads are different.

Rear Pads
HB478.605 Rear spring clip for 2004 & 2005
HB571.605 Top Spring clip for 2006-2011

Visit http://www.offlineracing.com/categor.../Mazda/Mazda3/
[/quote]

You have the part #'s reversed. HB478.605 = top spring clip and HB571.605 = rear spring clip.
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post #7 of 7 (permalink) Old 02-16-2012, 02:04 PM
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Re: Rear brake pads

[quote author=Adam3s link=topic=203656.msg4187628#msg4187628 date=1329418289]
[quote author=OffLineRacing link=topic=203656.msg4187624#msg4187624 date=1329417812]
The front pads 2004-2011 Mazda S is HB519.682


However the rear pads are different.

Rear Pads
HB478.605 Rear spring clip for 2004 & 2005
HB571.605 Top Spring clip for 2006-2011

Visit http://www.offlineracing.com/categor.../Mazda/Mazda3/
[/quote]

You have the part #'s reversed. HB478.605 = top spring clip and HB571.605 = rear spring clip.
[/quote]


Thank you for good catch:


HB571.605 Rear spring clip for 2004 & 2005
HB478.605 Top Spring clip for 2006-2011

- Ali

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