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Author Subject: Smelly RF Caliper?
mik

Seasoned Pro

Location: Kent

Registered: 17 Feb 2011

Posts: 2,100

Status: Offline
Post #1
I've had this on and off for a while, the right front caliper seems to stick and get quite hot so the RF wheel is warmer than the others after going for a drive. Have had the car on stands doing a refurb since March so it has not been driven much. The first couple of drives all the brakes were as cool as a cucumber.

Today I drove it 70 miles - some along motorway at 70-ish and not so much braking, some along windy roads with more braking. After the M4 stretch, it was fine, as I checked car carefully not having driven it far for months. But then when I stopped an hour later after B-road with more braking the RF caliper only was hot and smelly - deffo hotter than the other 3 calipers.

My thinking is a sticky RF caliper. But wouldn't this be constant, not intermittent, so I'm not sure it is only the caliper. Any other possible causes? Any info gratefully received.



________________________________________

Cherry Rallye SOLD

Posted 28th Oct 2012 at 00:38
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline
Post #2
Definitely sounds like a sticky piston or seized/binding sliders. Get it on stands, pop the wheel off and have a looksee, I think where the cars been laid up a while the calliper has probably partially seized.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
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Posted 28th Oct 2012 at 01:09
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline
Post #3
The other thing it could be is excessive play in the week bearing itself allowing the wheel, hub and disc to tilt and rub on the pads generating a fair it of heat through friction, that kind of wear would be pretty obvious though.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 28th Oct 2012 at 01:13
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mik

Seasoned Pro

Location: Kent

Registered: 17 Feb 2011

Posts: 2,100

Status: Offline
Post #4
Jim, a wheel bearing had crossed my mind as well. One WB was replaced shortly before I got the car, so this could be the other one giving up a few thousand miles later.

It is also making vibration through the steering wheel combined with a bearing-like noise (though not the noise I usually associate with a bearing), almost a bit "grinding/friction" in feel through the wheel. Again this does not happen constantly and improved somewhat after the car has been driven a few miles.

It started shuddering, with some resonance through the cabin, on the M4, then after about 10 minutes it went away, though the feeling that the wheels need balancing again remained throughout.

Definitely a lot worse since the car has been stood. Before it was perfect.

________________________________________

Cherry Rallye SOLD

Posted 28th Oct 2012 at 06:59
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daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline
Post #5
Time to jack it up and give the wheel a wobble then.

________________________________________

R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.

Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars
Posted 28th Oct 2012 at 07:29
Profile
Lecktorious

aka G.

Location: Edinburgh

Registered: 08 Jan 2009

Posts: 920

Status: Offline
Post #6
Could be a sticky piston in the caliper, Mik. My car isn't driven that often and I noticed on long journeys I would get a slight 'squealing' which would disappear when I used the brakes. More recently the car has been shuddering under braking and pulling to the right slightly.

Pushed the piston right back in and out a few times today. Seems a lot better now and the braking is a fair bit more progressive too.

________________________________________

'98 Nile Blue 306 GTi 6
Posted 28th Oct 2012 at 12:53
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #7
My vote would be the caliper piston...Yes

Out of interest, where was the car stored whilst it's been up on stands? Outside?
My car hasn't been driven for over a year now, but it's stored in a garage and once a week I go outside and pump the brake pedal a few times to stop anything seizing up in the calipers. Smile

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 28th Oct 2012 at 14:39
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mik

Seasoned Pro

Location: Kent

Registered: 17 Feb 2011

Posts: 2,100

Status: Offline
Post #8
Thanks all, OK sounds like it is the caliper. It was up on axle stands outside because the garage is simply not wide enough to work on the car inside.

I thought the caliper was a bit sticky before the lay-up, but is definitely worse now. I'll check the wheel bearing as well.

________________________________________

Cherry Rallye SOLD

Posted 28th Oct 2012 at 19:11
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #9
I guess sitting in the air for 6+ months outside open to the elements (even though it was summer) has possibly finished it off. I'm sure a strip down of the caliper and a good clean will see it back to proper order. Smile

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 29th Oct 2012 at 09:53
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mik

Seasoned Pro

Location: Kent

Registered: 17 Feb 2011

Posts: 2,100

Status: Offline
Post #10
Thanks for the replies, I've been off-line due to moving house and massive dramas getting a telephone line into a new build house - good old Soviet Bloc circa 1960s customer service. I could have worked around it if only I had got off my @r$e and got an iPhone...

Back on-topic, I got new OE discs and pads, and had a set of SH calipers I'd bought months ago installed. The difference is night and day, the car feels so much better and the brakes are brilliant. There won't be much original bits left at the front of the car when I'm finished.

________________________________________

Cherry Rallye SOLD

Posted 16th Nov 2012 at 17:30
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stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline
Post #11
Glad you got it sorted out, you could of serviced the existing calipers, but if you had another set spare then why not. Thumbs up

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 16th Nov 2012 at 18:45
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