AP Rear Anti-Rattle Clips

Deezer-D · 29-05-2011, 12:40 PM

Got a set of AP rears off off eBay recently. They were red but seeing as I had my fronts done black, I got Godspeed to refurb them to match the fronts. Couple of gratuitous pics

Anyway, had them fitted on Friday but the garage had trouble fitting the anti-rattle clips. Can anyone give me a few pointers to fitting them please?
Also when I picked the car up the pedal was really soft (I reckon not bled properly) so the bled the brakes again and it feels much better but slightly softer then it did with front APs and OEM rears - does that sound normal?
Cheers
D

**shimmy** · 29-05-2011, 01:30 PM

Pedal can be bled to rock hard if wanted (did you change the seals on the pistons)

Anti- rattle clips at rear go in so curve faces inwards and you place the tube in after and push down maybe a litte. Smetimes you have to wiggle and push the bolt in to get it to grip.

(tip at the fronts is never tighten up one of the two bolts until you have both located into the thread and caught in.

Deezer-D · 29-05-2011, 01:38 PM

Cheers shimmy.
Seals weren't replaced on this set, he said they were fine as were the pistons. This calipers were in much better condition than the fronts. Seller said they had only been used for 1500 miles although Godspeed thought they'd been used for more. Pads still have loads of life left on them (unless this wasn't the original set) so seller may have been right.
Still have the option of having them bled again but garage said there was no air in the system. He did just use a old school plastic bottle and hose to bleed them.
Will maybe have a go at the clips myself.

s.mac · 29-05-2011, 01:40 PM

rattle clips? would these stop the clunking I get when braking, it only clunks / clanks from the rear callipers ..

**shimmy** · 29-05-2011, 01:58 PM

Quote:

Originally Posted by s.mac

rattle clips? would these stop the clunking I get when braking, it only clunks / clanks from the rear callipers ..

Yep

I drove back from Spa with Duncan last year and bought some anti rattle clips for him, nearly drive me bonkers

(the lack of clips, not Duncan!)

**glendog74** · 29-05-2011, 04:26 PM

Quote:

Originally Posted by s.mac

rattle clips? would these stop the clunking I get when braking, it only clunks / clanks from the rear callipers ..

Nope - mine clunk all the time and i have anti-rattle clips...

I think it's the pads not quite fitting as snug as they should. I thought it was my rears at first but it is the fronts as the noise disappears when i lightly press the brake pedal. It still clunks if i lightly apply the handbrake to the rears...

Rather irritating!

**shimmy** · 29-05-2011, 05:11 PM

It does stop the rattle (hence he name) but not always the clunk

madcsl · 24-06-2011, 01:34 PM

Had the same problem - a clunk from the rear pads - here is the helpful response from AP

The mechanic is correct it is the clearance of pad to caliper (approx 1mm on length) that can cause pad knock as the car rolls forward or is reversed and the pad gets rocked back and forth producing a metallic click. It causes no harm but can be intrusive but if this clearance wasn’t there then the pads would expand and jam in the caliper! The anti rattle clip is there to arrest the rotational momentum of the pad and is normally enough to eliminate the clicking sound on take off, although it can’t overcome the loads applied during reversing so it can click then and once more as the car moves off. If yours are clicking constantly but the A/R clip is fitted correctly i.e. in contact with the top of the pad steel backing plate, then there are 2 other possibilities: -
1)
The pads are to short in length (Nom = 113.47mm / 5.20”) producing more clearance than required. But if the pads are as supplied with the brake kit it’s highly unlikely!
2)
The pads or discs are worn producing a wear lip that is causing the pad drag in free condition.
Solution: - Clean off any wear lip on pad or disc with a file, but don’t touch the braking faces!
If that’s not a cure then we can provide self-adhesive rubberised shims to attach to the calipers lower wear plates (2off only per caliper). To fit these shims dampers, the Pads need to come out and the calipers wear plates wiped clean of dust and grease.
It’s Very unusual to have to do this on the M3, but it will affect a cure. I’ll send the Agent in Sydney a set for you to try in their next shipment arriving with them early next week marked for your attention.
Part # CP5119-113

29-05-2011, 12:40 PM	#1
Deezer-D S2 - Picking it up Join Date: Nov 2010 Posts: 62 Casino cash: $2294	AP Rear Anti-Rattle Clips Got a set of AP rears off off eBay recently. They were red but seeing as I had my fronts done black, I got Godspeed to refurb them to match the fronts. Couple of gratuitous pics Anyway, had them fitted on Friday but the garage had trouble fitting the anti-rattle clips. Can anyone give me a few pointers to fitting them please? Also when I picked the car up the pedal was really soft (I reckon not bled properly) so the bled the brakes again and it feels much better but slightly softer then it did with front APs and OEM rears - does that sound normal? Cheers D

29-05-2011, 01:30 PM	#2
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Pedal can be bled to rock hard if wanted (did you change the seals on the pistons) Anti- rattle clips at rear go in so curve faces inwards and you place the tube in after and push down maybe a litte. Smetimes you have to wiggle and push the bolt in to get it to grip. (tip at the fronts is never tighten up one of the two bolts until you have both located into the thread and caught in. __________________ .

29-05-2011, 05:11 PM	#7
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	It does stop the rattle (hence he name) but not always the clunk __________________ .

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29-05-2011, 01:38 PM	#3
Deezer-D S2 - Picking it up Join Date: Nov 2010 Posts: 62 Casino cash: $2294	Cheers shimmy. Seals weren't replaced on this set, he said they were fine as were the pistons. This calipers were in much better condition than the fronts. Seller said they had only been used for 1500 miles although Godspeed thought they'd been used for more. Pads still have loads of life left on them (unless this wasn't the original set) so seller may have been right. Still have the option of having them bled again but garage said there was no air in the system. He did just use a old school plastic bottle and hose to bleed them. Will maybe have a go at the clips myself.

29-05-2011, 01:40 PM	#4
s.mac CSL Register Uber-poster! Join Date: Jun 2008 Posts: 4,247 Casino cash: $15600	rattle clips? would these stop the clunking I get when braking, it only clunks / clanks from the rear callipers ..

24-06-2011, 01:34 PM	#8
madcsl Wonky 'L' after Washing Join Date: Jun 2011 Location: Sydney Posts: 6 Casino cash: $279	Had the same problem - a clunk from the rear pads - here is the helpful response from AP The mechanic is correct it is the clearance of pad to caliper (approx 1mm on length) that can cause pad knock as the car rolls forward or is reversed and the pad gets rocked back and forth producing a metallic click. It causes no harm but can be intrusive but if this clearance wasn’t there then the pads would expand and jam in the caliper! The anti rattle clip is there to arrest the rotational momentum of the pad and is normally enough to eliminate the clicking sound on take off, although it can’t overcome the loads applied during reversing so it can click then and once more as the car moves off. If yours are clicking constantly but the A/R clip is fitted correctly i.e. in contact with the top of the pad steel backing plate, then there are 2 other possibilities: - 1) The pads are to short in length (Nom = 113.47mm / 5.20”) producing more clearance than required. But if the pads are as supplied with the brake kit it’s highly unlikely! 2) The pads or discs are worn producing a wear lip that is causing the pad drag in free condition. Solution: - Clean off any wear lip on pad or disc with a file, but don’t touch the braking faces! If that’s not a cure then we can provide self-adhesive rubberised shims to attach to the calipers lower wear plates (2off only per caliper). To fit these shims dampers, the Pads need to come out and the calipers wear plates wiped clean of dust and grease. It’s Very unusual to have to do this on the M3, but it will affect a cure. I’ll send the Agent in Sydney a set for you to try in their next shipment arriving with them early next week marked for your attention. Part # CP5119-113