I just replaced the front brakes with StopTech drilled/slotted and Hawk HPS. I know...some don't like the HPS but I've had them before, granted it was paired with the OEM rotors, and they worked fine and never squealed. I have 6 cars so I've bedded pads numerous times. I've lubed every crevice, twice!...but it still squeals. I only have less than 200 miles on them. After they heat up, when applying the brakes, the high-pitched squealing begins. If I keep constant pressure or apply more pressure until I come to a complete stop, it just produces the high-pitched screech. The worst sound is generated if I reduce the pressure just about when the car comes to a complete halt, I get a loud groaning moan! It's embarrassing at stoplights. So I've learned to just come to the stoplight like your approaching Turn 1 at a track and make my braking point so deep, just to reduce the squeal.
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It's the pads bro. They bads.2004 BMW ///M3 Carbon Black/Cinnamon 6MT
2005 BMW ///M3 Interlagos Blue/Black 6MT Dinan S3-R
2008 BMW ///M3 Alpine White/Bamboo/6MT Track Build
2000 BMW ///M5 Royal Red/Extended Caramel 6MT
2004 BMW X5 Toledo Blue/Sand Beige 6MT
2023 Toyota Supra //A91-MT CULG/Hazelnut 6MT
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Originally posted by Slideways View PostSounds like the pad is vibrating against the disc causing the squealing noise. Maybe the anti-rattle clip, assuming stock calipers, is no longer dampening the noise or something is defective with the pad/backing plate. That setup should not make noise during normal street driving.
Originally posted by Rkymtnrider View PostDownshift?17 iO1 i3
16 F22 M235i
08 E93 M3
04 E46 M3 Carbon Schwarz - SMG II - Discovery Automotive tuned - AFE Stage 2 - SS Stepped - SS Metallic Cats - Eisenmann X-pipe - SS Race - 4.10 - ACS CF lip - 6000K Heads & Fogs - Tein S
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Originally posted by eacmen View PostSince it only happens when the pads heat up I think you know the issue is the pads.17 iO1 i3
16 F22 M235i
08 E93 M3
04 E46 M3 Carbon Schwarz - SMG II - Discovery Automotive tuned - AFE Stage 2 - SS Stepped - SS Metallic Cats - Eisenmann X-pipe - SS Race - 4.10 - ACS CF lip - 6000K Heads & Fogs - Tein S
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I use HPS on M3 and 930. Both squeal, perfectly normal when they have some temp in them. Excellent for street. I’ve also run both of these cars on the track with the HPS, Just have to drive to your pads. You can’t drive these pads like a pure track pad.
Edit: Sorry, I just checked, I used HP Plus not HPS. I have no idea if the HPS should squeal, but the HP+ do.Last edited by Flat-Six; 05-04-2021, 09:15 PM.
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Originally posted by Slideways View PostHawk must have changed the compound cause the old HPS pads did not make any noise. Are these the HPS 5.0 pads?17 iO1 i3
16 F22 M235i
08 E93 M3
04 E46 M3 Carbon Schwarz - SMG II - Discovery Automotive tuned - AFE Stage 2 - SS Stepped - SS Metallic Cats - Eisenmann X-pipe - SS Race - 4.10 - ACS CF lip - 6000K Heads & Fogs - Tein S
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Originally posted by Da Jemster View Post
From FCP Euro = SKU: HAW-HB464N764
The HPS pads are different -
BMW HPS Brake Pad Set - Hawk HB464F.764
BMW HPS Brake Pad Set - Hawk HB518F.642
HPS 5.0 are the newer version -
BMW HPS 5.0 Brake Pad Set - Hawk HB624B.642
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I have these pads on mine. The boxes had different bedding-in procedures. I went the distance and did rears, broke them in. Then did fronts. Broke them in according to the directions (this is on OEM CSL front and OEM rear). Let me tell you...These Mothers squeal! You cant get around it. This is how they are. I drove them hard at thunderhill last weekend. They performed well. Even made noise on the track when hot. I am going to install another brand after these are worn. For what its worth, they took abuse. I have about 70% remaining after 1500 miles and one track day. No rear fade noticed at all during my sessions.
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Originally posted by Slideways View Post
Unfortunately, those are the HP+ pads....
The HPS pads are different -
BMW HPS Brake Pad Set - Hawk HB464F.764Last edited by Da Jemster; 08-03-2021, 11:51 PM.17 iO1 i3
16 F22 M235i
08 E93 M3
04 E46 M3 Carbon Schwarz - SMG II - Discovery Automotive tuned - AFE Stage 2 - SS Stepped - SS Metallic Cats - Eisenmann X-pipe - SS Race - 4.10 - ACS CF lip - 6000K Heads & Fogs - Tein S
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