Weird clicking noise from front in tight fast turns?
06-08-2018, 06:14 AM
#1
Weird clicking noise from front in tight fast turns?
I'm having an issue with fairly loud noise, kind of a clicking, coming from the front - presumably left wheel - in tight turns on track or pushing hard on for example a 270 degree on/exit ramp. The noise comes at aprox 90 degree lock and can be forced on/off around that point. It sounds more like metal than plastic.
I have no visible scraping anywhere. in either of the front wheel arches. I have tested two sets of wheels. Discs and pads has been changed and caliper seals renewed as well without change. The noise has been getting more and more pronounced over the last two years every time on track.
It does not sound like the grumbling noise I would expect from a bearing, but I have no real experience here. There are no play in either of the wheels and center locks and caps on brake discs are looking all good. No brake ducts or other visible equipment are loose.
Any ideas of where to look before I spend stupid money at Porsche?
I have no visible scraping anywhere. in either of the front wheel arches. I have tested two sets of wheels. Discs and pads has been changed and caliper seals renewed as well without change. The noise has been getting more and more pronounced over the last two years every time on track.
It does not sound like the grumbling noise I would expect from a bearing, but I have no real experience here. There are no play in either of the wheels and center locks and caps on brake discs are looking all good. No brake ducts or other visible equipment are loose.
Any ideas of where to look before I spend stupid money at Porsche?
06-08-2018, 12:38 PM
#2
Rennlist Member
Bearing
Dust shield
suspension arms
brake pad
Have you had the car up When you say no play - car up in the air, grab wheel at 3-9 and 12-6 and torque it really hard up and down, side to side. no play at all?
Dust shield
suspension arms
brake pad
Have you had the car up When you say no play - car up in the air, grab wheel at 3-9 and 12-6 and torque it really hard up and down, side to side. no play at all?
06-08-2018, 12:59 PM
#3
Suspension arms would be hard to check, but the bushes looks nice and the sound is more ‘light’ than ‘heavy’ sounding. Like if a wheel balancing weight hit the dust shield or stones toward bodywork, but 100% constantly repeated 3-4 times a sec.
Would not think pads as they have been replaced from Endless to PFC with no apparent changes to the sound which has been continuously building in volume.
Bearing, maybe. Would that ‘click’ like hard plastic towards metal or so?
06-08-2018, 03:15 PM
#5
Originally Posted by bmwtye
Have you checked the sway bar drop link?
If they were loose, I would evict l expect a more 'klonking' noise and not continuously repeated one?
I was just out testing and with a cold-ish car I can't recreate the sound. Also noticed that on track. So the issue is dependant of heat.
Would a failed bearing be prone to more noise if hot? I would think the opposite to be true?
But still wouldn't expect clicking from a bearing.
06-08-2018, 09:33 PM
#6
Rennlist Member
Well... things expand when they get hot.
Brakes get really hot
and the bearings
and shocks
is the noise commensurate with speed? Does it change with speed? If so. It’s something rotating.
If not its it’s something else.
Oh. Also. Reach around with wheels off and stick your fingers in the hub area abs ring area on backside of the hub. You may have a bunch of crap in there. You could also pull abs sensor and see if something is dragging...
If rotating it could be something in braking. Do you have floating hats? Or stock rotors?
I suspect wheel bearing... but it could be several things. Especially since it’s getting worse.
Brakes get really hot
and the bearings
and shocks
is the noise commensurate with speed? Does it change with speed? If so. It’s something rotating.
If not its it’s something else.
Oh. Also. Reach around with wheels off and stick your fingers in the hub area abs ring area on backside of the hub. You may have a bunch of crap in there. You could also pull abs sensor and see if something is dragging...
If rotating it could be something in braking. Do you have floating hats? Or stock rotors?
I suspect wheel bearing... but it could be several things. Especially since it’s getting worse.
06-09-2018, 01:27 AM
#7
Could be the hub is worn enough so the bearing’s inner race is rotating along the bearing. I had this happen in the rear. The sound was metallic clicking. There was no play in the bearing when I tried to wobble the wheel. Those bearings have split inner races and the other race was still tight so didn’ t feel loose when testing.
Have you checked the big nut in the hub is still tight? In my case it couldn’t hold the torque and started to work itself loose.
Have you checked the big nut in the hub is still tight? In my case it couldn’t hold the torque and started to work itself loose.
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06-09-2018, 02:45 AM
#8
Instructor
Clicking noise might be the floating brake rotor/s. If it’s coming from the left, I would assume the noise occurs while turning right. To test, simply go to a large parking lot, start turning in circles to create the noise, right foot on gas and then gently start to press brake with left foot. If the clicking noise stops, it’s most likely your center locks that are filled with too much grease. To fix, you must remove wheel, clean all grease from center locks, take your time and scotch bright clean to get everything out then follow procedure to Re-grease properly and torque wheel back on.
I had had this issue, dealer replaced ceramic rotors under warranty, clicking noise remained. Dealer then replaced center locks, they come Pre greased from the factory, Porsche tech took his time to clean wheels and made sure no grease was left on the wheel, he used scotch bright type material, installed wheels and noise disappeared. It’s been seven months and the noise hasn’t come back.
I had had this issue, dealer replaced ceramic rotors under warranty, clicking noise remained. Dealer then replaced center locks, they come Pre greased from the factory, Porsche tech took his time to clean wheels and made sure no grease was left on the wheel, he used scotch bright type material, installed wheels and noise disappeared. It’s been seven months and the noise hasn’t come back.
06-09-2018, 12:32 PM
#9
I've only had the noise at aprox 60 mph, as its roughly that speed it requires to activate the sound. Faster, I do not turn sharply enough to apply enough wieght (or what ever is activating it). So its hard to hear a change in the pattern. But I would guess it is and the exact repetition of the click makes me sure it is either rotating or getting hit by something rotating.
Could be the hub is worn enough so the bearing’s inner race is rotating along the bearing. I had this happen in the rear. The sound was metallic clicking. There was no play in the bearing when I tried to wobble the wheel. Those bearings have split inner races and the other race was still tight so didn’ t feel loose when testing.
Have you checked the big nut in the hub is still tight? In my case it couldn’t hold the torque and started to work itself loose.
Have you checked the big nut in the hub is still tight? In my case it couldn’t hold the torque and started to work itself loose.
No way of testing for the bearing inner race except taking it apart I'm guessing? But it that would be it, I'm guessing I won't have very easy turning of the disc with wheels and pads off. No noise or resistance, just very free flowing wheel.
Clicking noise might be the floating brake rotor/s. If it’s coming from the left, I would assume the noise occurs while turning right. To test, simply go to a large parking lot, start turning in circles to create the noise, right foot on gas and then gently start to press brake with left foot. If the clicking noise stops, it’s most likely your center locks that are filled with too much grease. To fix, you must remove wheel, clean all grease from center locks, take your time and scotch bright clean to get everything out then follow procedure to Re-grease properly and torque wheel back on.
I had had this issue, dealer replaced ceramic rotors under warranty, clicking noise remained. Dealer then replaced center locks, they come Pre greased from the factory, Porsche tech took his time to clean wheels and made sure no grease was left on the wheel, he used scotch bright type material, installed wheels and noise disappeared. It’s been seven months and the noise hasn’t come back.
I had had this issue, dealer replaced ceramic rotors under warranty, clicking noise remained. Dealer then replaced center locks, they come Pre greased from the factory, Porsche tech took his time to clean wheels and made sure no grease was left on the wheel, he used scotch bright type material, installed wheels and noise disappeared. It’s been seven months and the noise hasn’t come back.
But what I'm not understanding here is how the greasing of the center locks has anything to do with the floating rotor? And also cleaning the delicate center lock mechanism with sand paper like material sounds very strange to me. Can you elaborate a bit?
Thanks all!!!
06-09-2018, 07:21 PM
#14
Rennlist Member
FWIW i have full floating rotors. Brembo setup front rear. They make. Whirring sound at low speed. No clicking and at higher speeds you can’t hear.
He was referring to fully inspecting your wheels for a hairline crack.
He was referring to fully inspecting your wheels for a hairline crack.
06-09-2018, 11:36 PM
#15
Instructor
[QUOTE=
This is interesting. And today at a small trackday I forgot to do the brake test. I will do it as soon as possible, however its hard as I don't have the sound until the car is quite hot and here in Denmark we have no parking lots of that size.
But what I'm not understanding here is how the greasing of the center locks has anything to do with the floating rotor? And also cleaning the delicate center lock mechanism with sand paper like material sounds very strange to me. Can you elaborate a bit?
Thanks all!!![/QUOTE]
Too much grease will create space between wheel and attachment point thus allowing flex on the rotors, with all the force created in a turn, the springs on the rotors will flex and start snapping back creating a clicking noise. In my case the clicking noise was like clockwork, very precise and timely. I will look for my original thread, there was one other person who had the same problem and he also concluded it was over greasing and or residual grease.
This is interesting. And today at a small trackday I forgot to do the brake test. I will do it as soon as possible, however its hard as I don't have the sound until the car is quite hot and here in Denmark we have no parking lots of that size.
But what I'm not understanding here is how the greasing of the center locks has anything to do with the floating rotor? And also cleaning the delicate center lock mechanism with sand paper like material sounds very strange to me. Can you elaborate a bit?
Thanks all!!![/QUOTE]
Too much grease will create space between wheel and attachment point thus allowing flex on the rotors, with all the force created in a turn, the springs on the rotors will flex and start snapping back creating a clicking noise. In my case the clicking noise was like clockwork, very precise and timely. I will look for my original thread, there was one other person who had the same problem and he also concluded it was over greasing and or residual grease.