 wheel bearings, noise differnces |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| tomh |
 Jan 30 2011, 12:34 AM
Post
#1
|
|
Member  Group: Members Posts: 322 Joined: 28-February 10 From: san jose Member No.: 11,412 Region Association: None  |
I have noticed on this forum their is debate over the sound of a rear wheel bearing thats failing.I have a high pitch squeel thats cycilcal and starts at around 30 mph,it will stop with a quick jerk of the wheel to the left.It is not brake related because braking will not affect the noise.I just changed the front bearings and am still hearing the noise.This leads me think its the rear bearings.I have read all the past threads on this subject and some people say bearings only growl when failing.My question is it possible that this high pitch squeel could be the bearing?
|
   |
 
|
  |
Replies
| pcar916 |
Feb 11 2011, 03:56 PM
Post
#2
|
|
Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None 
|
I'm not gonna speculate, but instead put in a plug for Preventive Maintenance, otherwise known as "PM". Industry and racing concerns rely on it to keep costs down and safety at a predictable level.
That's when, at regular intervals, you inspect and repack the CV's and wheel bearings. PM isn't limited to these items of course. But I've never had either one give me a catastrophic problem. Every two years (street car) or every year (street/track car) or every few races, wheel bearings get inspected and repacked with synthetic grease. No dino grease here, synthetic is the best for bearings because it's slippery... er. Given proper maintenance CV's go longer than bearings, but are one of the most neglected high-wear bits on our cars. I'd take all of the above pieces out for a PM session, replace what's pitted and repack the rest. Then write down what you did and when. Do it again before you have a problem. Note: PM is one of the first things to go when the budget gets tight, for government, companies, and people. It's a false economy and costs more in the long run. I understand when it happens but it's gonna cost more in the long run. If you have a problem with one bearing/cv then you may have one with the others if they've been treated in a similar fashion so inspect them all. Heck, some burgers and a little beer will attract all kinds of interested 914'ers to help! Good luck finding your squeal. I'd make no assumptions. Tech tip: With tapered bearings slightly loose is better than slightly tight... and loose bearings rumble |
|
|
|
Posts in this topic
tomh wheel bearings Jan 30 2011, 12:34 AM
Cap'n Krusty Not very likely.
The Cap'n Jan 30 2011, 12:53 AM cary I had on fail on my 911. No squeal. It was a harmo... Jan 30 2011, 12:59 AM
SirAndy No squeal. It was a harmonic drone.
:agree:
It... Jan 30 2011, 01:39 PM wertygrog Yep, mine did the same exact thing. The squeel wou... Jan 30 2011, 01:07 AM Elliot Cannon Could it be cv joints? Jan 30 2011, 02:44 PM stugray "Could it be cv joints?"
IME, the sympt... Jan 30 2011, 05:26 PM astronomerdave I have what seems like the same problem. Never bel... Feb 11 2011, 03:21 PM timofly
I have what seems like the same problem. Never be... Feb 11 2011, 05:58 PM detoxcowboy could be the front again, shit happens.. find a lo... Jan 30 2011, 05:36 PM 6freak
simple put YES it can generate a frequency that ... Feb 11 2011, 03:35 PM tomh I went ahead and changed all 4 bearings front and ... Feb 11 2011, 05:40 PM Eric_Shea The special bearings they use on 914S models cause... Feb 11 2011, 05:49 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 4th July 2025 - 11:07 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.