12-16-2020, 07:45 AM
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#21
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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Best way to listen for a noise is to drive close to a solid wall at night so the noise bounces off the wall back to you, you will be amazed at the difference.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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12-16-2020, 08:19 AM
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#22
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,858
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Quote:
Originally Posted by Jasper7821
I went downhill straight from 40-70mph and jerked the wheel both directions and no difference.
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Jasper,
I am sorry, English is my second language, and perhaps was not very clear on my comments...
I noticed that you mentioned 'jerked the wheel' and what I meant about loading the bearing is by turning the wheel hard to one side but for a few seconds (not just momentary), similar to carving a wide turn with giant slalom skis.. this is when you can increase (and hear) the humming noise from a bearing
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Last edited by Gilles; 12-16-2020 at 08:21 AM.
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12-16-2020, 09:10 AM
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#23
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by BYprodriver
Best way to listen for a noise is to drive close to a solid wall at night so the noise bounces off the wall back to you, you will be amazed at the difference.
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I did that, but unfortunately under about 25mph it doesn’t make the noise. Hard to find a long enough wall with no one around to get up to speed for a few seconds to listen.
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12-16-2020, 11:13 AM
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#24
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Registered User
Join Date: Jan 2019
Location: PA
Posts: 1,531
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Quote:
Originally Posted by Jasper7821
Side note, from your username, are you a pilot. I used to have a 76 and 77 Arrow and miss it dearly.
Thanks again.
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Yes, I used to fly a Warrior II. N6909T was the tail number of the plane I learned to fly in. It has been a few years, I need to get up again!
__________________
2002 Boxster Base - Arctic Silver - Tiptronic
2010 Subaru Forester
1980 Ford C-8000 Custom Cab Emergency-One Fire Truck
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"I never lose. I either win or I learn." -Nelson Mandela
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12-16-2020, 11:26 AM
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#25
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Registered User
Join Date: Jan 2019
Location: PA
Posts: 1,531
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willw and BYprovider gave excellent tips. Is there a highway you can drive on that has a concrete barrier? It doesn't have to be a building. A 3 foot tall concrete barrier is plenty tall enough to bounce the sound of a bearing. Keep your windows down.
And check with your local PCA for an indy near you.
$1500 to replace a wheel bearing is nuts! The most expensive wheel bearing on Rock Auto is $68. I couldn't find one in our sponsor's site.
__________________
2002 Boxster Base - Arctic Silver - Tiptronic
2010 Subaru Forester
1980 Ford C-8000 Custom Cab Emergency-One Fire Truck
__________________
"I never lose. I either win or I learn." -Nelson Mandela
Last edited by piper6909; 12-16-2020 at 11:52 AM.
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12-17-2020, 05:00 AM
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#26
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by piper6909
willw and BYprovider gave excellent tips. Is there a highway you can drive on that has a concrete barrier? It doesn't have to be a building. A 3 foot tall concrete barrier is plenty tall enough to bounce the sound of a bearing. Keep your windows down.
And check with your local PCA for an indy near you.
$1500 to replace a wheel bearing is nuts! The most expensive wheel bearing on Rock Auto is $68. I couldn't find one in our sponsor's site.
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Thank you, I’ll try that and see what happens. And yes, $1,500 is crazy. Less the parts, they’re saying almost 8hrs labor to change 2 wheel bearings.
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12-17-2020, 05:03 AM
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#27
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by piper6909
Yes, I used to fly a Warrior II. N6909T was the tail number of the plane I learned to fly in. It has been a few years, I need to get up again!
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Very nice, I really miss it. My 76 was N9644K and had a really nice leather interior/new plastics. I work with 747’s in the desert so at least I’m still around aviation.
Last edited by Jasper7821; 12-17-2020 at 05:05 AM.
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12-17-2020, 06:28 AM
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#28
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,793
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Quote:
Originally Posted by Jasper7821
Thank you, I’ve only had the car for 6 months and it’s been perfect so I haven’t searched other shops yet, but will.
Thank you
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Definitely contact your local PCA chapter. You will get some good referrals
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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12-17-2020, 06:32 AM
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#29
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Registered User
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,294
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Jasper
If you suspect a wheel bearing and you don't have the means to change it out yourself.
Take the car to "ANY Reputable" shop that does suspension work.
Have them test the car for bad wheel bearings.
There is nothing secret or complex or Porsche specific about wheel bearing issues or fixes. No need to take it to a "Porsche" dealer or Porsche garage.
Wheel bearings can be changed out by a school boy with minimal knowledge.
$1500.00 to change a couple of wheel bearings out is theft.
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12-17-2020, 09:43 AM
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#30
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by JayG
Definitely contact your local PCA chapter. You will get some good referrals
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Will do, thank you
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12-17-2020, 09:48 AM
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#31
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by blue62
Jasper
If you suspect a wheel bearing and you don't have the means to change it out yourself.
Take the car to "ANY Reputable" shop that does suspension work.
Have them test the car for bad wheel bearings.
There is nothing secret or complex or Porsche specific about wheel bearing issues or fixes. No need to take it to a "Porsche" dealer or Porsche garage.
Wheel bearings can be changed out by a school boy with minimal knowledge.
$1500.00 to change a couple of wheel bearings out is theft.
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Ya, I should just try it myself and get a bearing press kit and whatever else is needed. It is my 2nd car so not a big deal if it can be driven for a bit. I changed control arm bushings by myself on my old BMW many years ago so maybe I just need to try it.
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12-17-2020, 10:38 AM
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#32
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Registered User
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,294
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Quote:
Originally Posted by Jasper7821
Ya, I should just try it myself and get a bearing press kit and whatever else is needed. It is my 2nd car so not a big deal if it can be driven for a bit. I changed control arm bushings by myself on my old BMW many years ago so maybe I just need to try it.
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The Bentley Porsche service manual describes the procedure (with pictures).
IT is pricey around $95.00 but for general service and maint. it is about all that is available. It describes the process and tools well enough that even a novice should be able to do the task.
I suggest that as a first step you purchase the Bentley service manual.
Then you have a means of reference for not only wheel bearing replacement but many other service maint. procedures.
Then after reading,up on an issue (such as wheel bearing replacement) you will have a better idea of if you are capable of doing the job or if you need to hire it out.
The other thing is to be sure it is a wheel bearing you are hearing and not something else. Sucks to spend money and do work and replace parts to find out you didn't fix the problem.
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12-17-2020, 10:43 AM
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#33
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Thank you, I watched a few YouTube videos of 986 wheel bearing changes. But yes, the service manual would’ve great.
Quote:
Originally Posted by blue62
The Bentley Porsche service manual describes the procedure (with pictures).
IT is pricey around $95.00 but for general service and maint. it is about all that is available. It describes the process and tools well enough that even a novice should be able to do the task.
I suggest that as a first step you purchase the Bentley service manual.
Then you have a means of reference for not only wheel bearing replacement but many other service maint. procedures.
Then after reading,up on an issue (such as wheel bearing replacement) you will have a better idea of if you are capable of doing the job or if you need to hire it out.
The other thing is to be sure it is a wheel bearing you are hearing and not something else. Sucks to spend money and do work and replace parts to find out you didn't fix the problem.
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12-17-2020, 10:47 AM
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#34
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Registered User
Join Date: Aug 2018
Location: Woodland Wa
Posts: 1,294
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Quote:
Originally Posted by Jasper7821
Thank you, I watched a few YouTube videos of 986 wheel bearing changes. But yes, the service manual would’ve great.
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Keep us posted on what you find and do with the "Noise issue" I think most of us on the forum like to hear end results.
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12-17-2020, 07:51 PM
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#35
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Quote:
Originally Posted by blue62
Keep us posted on what you find and do with the "Noise issue" I think most of us on the forum like to hear end results.
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Yes for sure.
Will probably get to spend some time on it next weekend.
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12-21-2020, 01:49 PM
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#36
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Pathological Tinkerer
Join Date: Mar 2017
Location: Utah
Posts: 197
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Before tearing anything apart, do a sanity check on your tires even though it is not likely one or more would be bad.
Put on some latex gloves and run your hands over the tread on each tire around the whole circumference to feel for any unevenness, small bump, etc.
I replaced front bearings on my S4 last winter and it turned out in the end to be a tire issue.
I replaced the Boxster bearings two years ago and you do not need to remove the strut/hub assemblies to do so. Youtube has a bunch of vids on wheel bearings and anything BMW related is also similar enough to be instructive.
Bearing manufacturers put minimal grease in bearings so I disassembled mine and repacked them with Redline CV.
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12-22-2020, 12:00 PM
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#37
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Registered User
Join Date: Jun 2020
Location: Arizona
Posts: 196
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Thank you, I will do that although I think the tires are fine, but would be nice if it happened to be a tire.
And I did watch some videos and also one saying to take the bearings apart and add grease.
Hopefully I’ll have time to work on it in the next week or two.
Thanks again
Quote:
Originally Posted by P_Carfahrer
Before tearing anything apart, do a sanity check on your tires even though it is not likely one or more would be bad.
Put on some latex gloves and run your hands over the tread on each tire around the whole circumference to feel for any unevenness, small bump, etc.
I replaced front bearings on my S4 last winter and it turned out in the end to be a tire issue.
I replaced the Boxster bearings two years ago and you do not need to remove the strut/hub assemblies to do so. Youtube has a bunch of vids on wheel bearings and anything BMW related is also similar enough to be instructive.
Bearing manufacturers put minimal grease in bearings so I disassembled mine and repacked them with Redline CV.
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