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Kbald
Silverstone


Joined: 11 May 2018
Posts: 148
Location: West Yorkshire


PostPosted: Tue Apr 02, 2019 5:43 pm    Post subject: Squeal / screech after fitting spacers Reply with quote

Hi all. I recently fitted some 20mm hub centric spacers all round and all of a sudden I have a loudish squeal from the neasrside, but it only seems to appear after a few miles. Sounds a bit like the wheel rubbing or a brake sticking. There is no tyre rub on the arches as the wheels are only 17 inch and the suspension is standard height. The noise doesn't disappear when breaking but does at standstill so it isn't the engine or belt.

Does anyone have any ideas at all what it could be? I used longer bolts on the spacers and greased the hubs before fitting. I assume it's to do with spacers otherwise would be to coincidental. Any help would be appreciated.
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 16369
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Apr 02, 2019 7:01 pm    Post subject: Reply with quote

It's not the longer bolts rubbing on the hub carrier? i.e. they're too long and poke right through the hub up against the carrier?? Dont know
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Kbald
Silverstone


Joined: 11 May 2018
Posts: 148
Location: West Yorkshire


PostPosted: Tue Apr 02, 2019 7:05 pm    Post subject: Reply with quote

Thanks Alex. I considered that but it only seems to be 1 wheel and when it heats up but it could still be that. How would I check that is there a visual I could do?
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Alex
Le Mans
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2000 Porsche 996 Carrera 4

PostPosted: Tue Apr 02, 2019 7:07 pm    Post subject: Reply with quote

Check the end of each bolt if you can see where it's been rubbing. Should be easy if only on one wheel.
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Alex
Le Mans
Le Mans


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Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Apr 02, 2019 7:08 pm    Post subject: Reply with quote

Suppose it may be a wheel bearing as there is extra load on the bearing once spacers are fitted (due to the extended offset).
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Kbald
Silverstone


Joined: 11 May 2018
Posts: 148
Location: West Yorkshire


PostPosted: Tue Apr 02, 2019 7:13 pm    Post subject: Reply with quote

Thanks will ship the wheel off and check the bolt heads. Need to free up the rear retaining pin so I can tighten the handbrake anyway so will have a session on axle stands investigating.
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Alex
Le Mans
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Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Apr 02, 2019 7:15 pm    Post subject: Reply with quote

You can check the bolts one at a time without having to do anything else.
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Kbald
Silverstone


Joined: 11 May 2018
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Location: West Yorkshire


PostPosted: Tue Apr 02, 2019 7:20 pm    Post subject: Reply with quote

True will get some out tomorrow and have a look before doing the rest at the weekend, weather permitting! Will report back and hopefully it's something simple like that rather than a bearing etc
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8260
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Wed Apr 03, 2019 12:06 am    Post subject: Reply with quote

alex yates wrote:
Suppose it may be a wheel bearing as there is extra load on the bearing once spacers are fitted (due to the extended offset).


I would tend to agree, the wheel bearing may have been slightly worn already and the Carlos Fandango factor has put too much pressure on it now it's extended by 20mm.
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wasz
Sepang


Joined: 28 Dec 2012
Posts: 2938


1999 Porsche 996 Carrera 2

PostPosted: Wed Apr 03, 2019 10:01 am    Post subject: Reply with quote

On a track day once I had a hideous scraping noise.

Came in car cooled it went away and was back when hot.

Turned out the brake disc shield plate was very close to the disc, when heated it must have just touched.
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Kbald
Silverstone


Joined: 11 May 2018
Posts: 148
Location: West Yorkshire


PostPosted: Wed Apr 03, 2019 3:38 pm    Post subject: Reply with quote

Hi just to update I've had the wheel nuts off and they all look fine however the rear brake disc shield is loose so I suspect as per wasz suggestion that this could be the issue.

Now just need to get the caliper retaining pin or of the caliper to get it and the disc off to remove or repair the dust shield.

Any advice on being a stuck pin it other than wd40 and heavy hammer and drift? Bit too tight to get an angle grinder in there to cut the pin.
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6799
Location: Brighton


PostPosted: Wed Apr 03, 2019 7:17 pm    Post subject: Reply with quote

Caliper is held on with bolts so i don't think you mean that .. you mean the pad retaining pin ?

if so i would normally scrape the rust with a screwdriver then plenty of lub and beat the hell out of it .. correct size punch makes a lot of difference , the largest you can fit in the hole basically .

you don't actually have to remove this pin if removing a caliper though .. undo the bolts .. pull the caliper towards you then away .. this will push the pads into the caliper and you can remove it .. pads in situ .

If you DO mean caliper bolts then its a stripped thread that needs drilling and a time sert .
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Kbald
Silverstone


Joined: 11 May 2018
Posts: 148
Location: West Yorkshire


PostPosted: Wed Apr 03, 2019 7:25 pm    Post subject: Reply with quote

Thanks DM I did mean the pad retaining pin yes.

I did try with a large punch and effort but got scared and didn't want to damage the caliper. Perhaps remove the bolts and pull off the caliper will give me chance to get some grips on to try and twist it to break up the crud and rust of it to knock it out. Thumb
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deMort
Long Beach


Joined: 21 Mar 2015
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PostPosted: Wed Apr 03, 2019 7:30 pm    Post subject: Reply with quote

I've had many that are pretty dam tight .. scrape off the rust you can .. soak it , its then its just a case of beating the hell out of it .. i've never broken a caliper before .. but i guess it can happen ... just not to me as someone up high loves me Very Happy

you don't need to for this job though as mentioned above .

sooner or later you will have to though .. pads don't last forever .
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Kbald
Silverstone


Joined: 11 May 2018
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Location: West Yorkshire


PostPosted: Wed Apr 03, 2019 7:40 pm    Post subject: Reply with quote

thumbsup will give it a go. Offside came out fine so a bit more bashing should see it free!
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Kbald
Silverstone


Joined: 11 May 2018
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Location: West Yorkshire


PostPosted: Wed Apr 03, 2019 7:43 pm    Post subject: Reply with quote

Thanks everyone for your help and suggestions so far again. Truly a very helpful bunch on here.
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wasz
Sepang


Joined: 28 Dec 2012
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1999 Porsche 996 Carrera 2

PostPosted: Thu Apr 04, 2019 10:28 am    Post subject: Reply with quote

You may find the bolts that hold the disc shield on are well stuck and snap off.

Some people just bin the shields.
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
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Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Apr 04, 2019 11:56 am    Post subject: Reply with quote

Wished I'b binned mine instead of fitting new ones. Every week I slice the back of my hand open when washing the insides of my alloys.
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MaxA
Albert Park


Joined: 11 Oct 2015
Posts: 1538
Location: Helsinki


PostPosted: Thu Apr 04, 2019 1:45 pm    Post subject: Reply with quote

I suppose I'm coming to this thread late, but in my experience sudden screeching noises are usually small stones caught between the brake shields and brake discs. Although a car does make a terrible racket if you drive over a branch and that gets stuck. Even a little one.

As you might surmise, I live down the end of a gravel road in the country. Sticks, stones, potholes, mud and dust are a part of my motoring life.
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