A roaring sound when turning

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Kestas,

You said;"They also erroneously believe that bearings must be replaced in pairs, much like shocks and brakes. That is not true. Only the bad bearings must be replaced."

Most of us aren't really that stupid. Just that it's so ****ably hard to diagnose WICH SIDE, that it's better to tell a "little white lie" than to explain why our "fix" wasn't and their gonna have to bring it back(usually tough on the cusomer's schedule and ours), and spend the same amount of money again. This means you've got to discount the second bearing, or they really feel "ripped off". Unless you know your customer really well and can explain a bit of double jeapordy up front, it's often better to just sell 'em both bearings and maybe discount a little on two bearing job.

As allways your professional input is greatly appreciated. Feel I learn more from 2-3 of you who are expert in your field than I ever give back to shadetreers(same as home garage) guys asking questions.

Bob
 
I'm glad to hear you don't subscribe to the "bearings must be replaced in pairs". Unfortunately, I quite often read from posters here and other auto repair sites where they do subscribe to this mantra.

I'm not just an engineer who sits in a lab all day, I also wrench on a lot of vehicles. And I can commiserate with mechanics on how difficult it is to diagnose problems, and cringe at the thought of repair facilities having to interface with customers, who have no idea what it takes to properly diagnose and repair a vehicle.

I've learned a lot from mechanics and other DIYers, and I often bring this knowledge to the lab with me when I'm slogging through the customer narratives and mechanic diagnoses. Often, I read through the repair order for a shudder problem and see EVERYTHING was replaced... rotors, pads, bearings. And surprise... no bearing problem! My thought is that this dealer needed to appease their customer, and fix it in the first shot.
 
One of the thing(s) that I find interesting RE: mechanical diagnosis is that proper diagnosis require all human senses to tell what's wrong with it: sense of smell (burning, oil/ATF smell, burning antifreeze, oily smoke, etc.), sense of vision (what can be picked up visually?), sense of touch (feel the vibration), sense of hearing (what's the noise?), etc.

I know no 2 mech are of the same level of sensitivity when it comes to detecting differences between something wrong or something not-wrong but here are my 2c's RE: sensing what's wrong with bearings: you need a strong sense of feel(body sensation), and a keen sense of hearing and patience in order to narrow down pesky integrated wheel bearing problems these days, or things that doesn't make sense. While I must say that I'm an idiot when it comes to sensing A/T shrudders, I can tell what's wrong/fault in suspension RE: wheel bearing with fairly good accuracy, all thanks to my acute hearing (yes, I'm also an ultra-fi/audiophile during afterhours, specialising in tube audio gears and SETs) and also strong sensation on my back (that one is from rallye + SCCA slalom racing in my early years).

One of the things that I cannot stressed enough RE: in the field of auto mechanics is that (a) learn to protect yourself properly from chemical harm, toxins accumulations and burns. nitrile gloves, ear muffs and protective eye gears are a must (b) learn to pamper your body for maximum/peak sensitivity: that is something that I've learned through years of minor abuse but one thing I really enjoy the most is the relative quiet/serenity in my suburb neighbourhood where I can sleep through the nite with avg noise. Also: I'm against noisy exhaust, stoopid boombox (never done that in my life), MP3 music through closed-circuit headphones, etc.

That's what separates me and the Honda dealership monkeys when it comes to diagnosing wheel bearing problems such as the one on my dad's 6th gen civic....

My 2c's worth.
 
Unfortunately, after spending most of my youth and early adulthood thinking I was Superman, and a total disreguard for hearing protection while working and shooting, most everything works well enough,,,,If I could only hear myself phart!
tounge2.gif


Bob
 
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