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Slight Howl / Hum Noise From Where ???


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NorPlan
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Aug 24, 2016, 9:40 AM

Post #1 of 12 (486 views)
Slight Howl / Hum Noise From Where ??? Sign In

Smile 2013 Chrysler 200 / 2.4L / 77,000km + Showing, Just your Basic Plain Jane Model.. Picked Up a Slight Howl / Hum Noise , Nothing Drastic ?? The Noise comes when reaching Highway Speeds about 80kph.. Tire Pressures all around @ 32psi, All Fluid Levels Good, Kick Throttle, No Loose Exhaust Noise.. Cruising kick throttle Engine Sounds & Performs as it should..

Wondering if it's possibly the All Season Tires, 4th Season with 1/8" tread showing.. Haven't reached the Warning Bars in the Tread Yet, We Run Winter Snowtires on All 4 in Season.. Thoughts & Ideas Appreciated, Cheers Thanks..


Tom Greenleaf
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Aug 24, 2016, 10:23 AM

Post #2 of 12 (482 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

First thought is tires or a bearing. Understand the tire swap for seasons but you should be marking them from where they came from to know where to put them back on so not always on same spot/location on car - like rotating tires.


Tire wear can cause noise as well as bearings like this.


You say 1/8th life left - hey - your call but waiting for treadwear bar so show is the last legal amount but do NOT have anywhere near the ability of the first 1/2 of the life of a tire. Suggest you think about new ones even if not the cause but might be,


T



Hammer Time
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Aug 24, 2016, 11:26 AM

Post #3 of 12 (477 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

If tires aren't rotated regularly they will set in wear patterns that can cause road noise.



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NorPlan
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Aug 24, 2016, 12:11 PM

Post #4 of 12 (473 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

@ Tom Greenleaf & Hammer Time.. Thanks for the Comebacks.. Was leaning towards the Possiblity of Tire Hum, as mentioned We run Winter Snows on all 4 in Season and do get a distinctive Tire Hum on Asphalt.. Different to All Season Tires.. Yes Agreed the Tread Wear left on the All Season Dictates Replacement in the Spring.. Will Checkout the Wheel Bearings.. Hope Not , had a Jeep Compass seemed to eat bearings .. Went around twice before having enough of it..lol..


Tom Greenleaf
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Aug 24, 2016, 12:46 PM

Post #5 of 12 (470 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

If you rotate tires and should IMO every 3,000 miles they will wear evenly if not wildly out of alignment.
You are changing whole sets as I said so need to mark inside where they were so you don't put them back just anywhere. Keep track.
Silver Sharpies work and can clean off with paper towel and carb cleaner or get a tire marker crayon,


T



NorPlan
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Aug 24, 2016, 12:52 PM

Post #6 of 12 (468 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In


In Reply To
If you rotate tires and should IMO every 3,000 miles they will wear evenly if not wildly out of alignment.
You are changing whole sets as I said so need to mark inside where they were so you don't put them back just anywhere. Keep track.
Silver Sharpies work and can clean off with paper towel and carb cleaner or get a tire marker crayon,
T



10-4.. I believe the Snows are Marked..lol..


NorPlan
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Aug 25, 2016, 6:43 AM

Post #7 of 12 (449 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In


In Reply To

Tire wear can cause noise as well as bearings like this.

T



@Tom Greenleaf... Did Serpentine Test @ 80kph.. Sound Changes / Goes Quiet when I bring car back.. The Hum just started this week , how much grace do we have before the Hum grows louder ?? Bearings aren't cheap.MadMadMad


Tom Greenleaf
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Aug 25, 2016, 7:22 AM

Post #8 of 12 (445 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

None of it's cheap! Let's separate common symptoms:


Tire noises: Usually you can see or feel a flaw from lack of rotation. Follow vehicle's and tire's rules to cross rotate ever other time then front to rear usually will avoid tires making noise from odd wear. Some tires are more prone to noise than others too. It's not usually ALL of them so if you just rotate tires now - say one side front to back at a time and noise follows wheel where that tire and rim are it's the tire.


Insert notation: If you don't have these tires on rims of their own and are constantly taking these on and off rims seasonally you are really pushing it IMO with the tires! It's a bit of stress on a tire to come on and off all the time. That and a tire gets used to tiny flaws of the exact rim it's on over time so moving it if that's what you are doing is asking for troubles.


OK back to bearing noise: Almost all bearing noise will be worse at certain loads more than speed but could be that too. On a nice road with curves at some speed you may notice that turning while at some legal speeds it would do this should make it better or worse going left or right shifting the load of the vehicle. Almost all bearings will start showing up as bad that way.


If a real bearing is "galling" to make noise only now it could last a long time or a mile or less. The warning is there so life of a bad one isn't known to me.


Refresh: Again if you are dismounting tires to same rims you are harming the tires. Almost no wheel is that perfect nor a tire so the wear and balance must match rim to tire. It will as said wear in to the minor defect of trueness of the wheel but move it that is lost and then worse as they get older,


T



NorPlan
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Aug 25, 2016, 7:57 AM

Post #9 of 12 (443 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In


In Reply To
None of it's cheap! Let's separate common symptoms:

Tire noises: Usually you can see or feel a flaw from lack of rotation. Follow vehicle's and tire's rules to cross rotate ever other time then front to rear usually will avoid tires making noise from odd wear. Some tires are more prone to noise than others too. It's not usually ALL of them so if you just rotate tires now - say one side front to back at a time and noise follows wheel where that tire and rim are it's the tire.

Refresh: Again if you are dismounting tires to same rims you are harming the tires. Almost no wheel is that perfect nor a tire so the wear and balance must match rim to tire. It will as said wear in to the minor defect of trueness of the wheel but move it that is lost and then worse as they get older,

T


Angelic... The Hum is a Low Pitch , It's Not Constent... Because we are only a month or so away from switching back to the Winter Snows, I'm hoping to perform my best Sherlock Holmes and Deduce what is the Actual Noise ...lol..


Tom Greenleaf
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Aug 25, 2016, 8:23 AM

Post #10 of 12 (439 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

You don't need to be Sherlock - this is pretty primal as diagnosis of a tire or wheel bearing goes just takes a novel to explain.


You didn't answer me - DO YOU TAKE TIRES OFF OF THE RIMS OR HAVE WHOLE WHEELS READY TO GO WITH THIS? Said that if you mount and dismount a tire unless right away new for a reason you are harming it!


Plenty of folks work (do tires and me included) if you put a new one a rim and then it takes too much (more than say 2oz weight) to balance you mark and change position of new tire on rim and find usually 180 then balance check again it's better or worse.


Rims even if fixing a flat you should index where or what spot it was mounted on - usually mark an arrow at valve stem and put it back on there as it's already worn into that wheel right there. Move it and it doesn't have tread life to wear into that again and again.


Simple but know that wheels are not 100% perfectly true nor are tires but will wear in true when both new fairly quickly and that's it's home spot for that rim.


Any changes in that - new tires, one new tire or not putting back where it was you messed with it.


Results if so: They don't feel balanced is the usual complaint and are! Vehicle may pull to one side and didn't before as it wore into minor defects that are really not safety issues but annoying. Just need to know what you are doing?


When folks switch whole tires to be very aggressive for Winter they almost always buy wheels as well.
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If you did and this noise comes and goes note when it does it. I explained already on turns a bearing will make more or less noise just like a humming like a rough road perhaps to verbalize what the sound is. Then move a wheel that's silent there and try it and if noise moves or stays you know which - tire/wheel issue or bearing.


I already asked you that. If confused take it to a real tire shop with real certified techs if worth their trade should know plenty about complaints of the sort and most would do repairs and alignments as well. Skip most chain places IMO could be fine but too many changes in techs and other reasons not always the best help with something fussy,


T



NorPlan
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Aug 25, 2016, 8:52 AM

Post #11 of 12 (435 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In


In Reply To
You didn't answer me - DO YOU TAKE TIRES OFF OF THE RIMS OR HAVE WHOLE WHEELS READY TO GO WITH THIS? Said that if you mount and dismount a tire unless right away new for a reason you are harming it!
T

Pirate. Sorry.. Guilty As Charged.. The Snows are not Mounted.. Just use the Original Rims that came with the car.. Break Beed & Balance each changeover.. Had a Jeep Compass previous , same story for tire changeover.. Never thought I was Harming the Tire considering we had the Tires Properly Balanced each time, Is All..


Tom Greenleaf
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Aug 25, 2016, 10:58 AM

Post #12 of 12 (428 views)
Re: Slight Howl / Hum Noise From Where ??? Sign In

OK - Sorry if I sounded harsh - not meant. If you do it that way you would require the most top shelf wheels and tires known which isn't realistic. Tires will eventually mess up just doing it that way.
Think - I'm trying to explain this with logic: If tires and wheels new were always perfectly true and in balance then there would never be a need to balance them. You can't do that unless mounted in which case both are balanced to flaws together in just that spot, ONCE. Yes you do it again if tire needs repair or periodically but shouldn't move the initial index of a tire to the rim if at all possible.


What happens is when all was new together the flaw was just a lead (Pb on periodic chart) weight added. This is essentially covering up the flaw in tire or wheel just an ounce or sometimes almost none. Then in use the tire will "machine" itself to match the imperfection and have an unseen imperfection that doesn't matter. Once worn and you change that you don't have the rubber left to wear off to accommodate that. Hope that explains why folks buy four rims that do what you do not just for this but also it's just changing whole wheel and tire not just tires that again and again get removed, rebalanced over and over.


So: It still might not be this! Bearings are as already said. You can feel them but nice if on a perfect road having ruled out tires by the swap thing mentioned.


Such that perhaps noise is front left when you turn right with weight of vehicle harder on left side it would usually make the noise worse, sometimes better but if bearing along almost (room for errors in anything) always show up that way.


If an easy hub bearing the part should be the cost and labor less and pressed in the opposite if bearing issue. You do need to know.
The hub type especially you can feel the old one in your hands spinning it there's a very slight roughness vs (has to be a used good one) good one. New they are sticky with new grease so out of a box isn't a good test.


This stuff is totally routine for a well rounded tech. Oh boy, can't speak for all. I still do this retired or not just feel tires and take a quick ride and know by just that which is doing what running about 9999999999.9% - I forget any time I was wrong not to be cocky about it.
For me if bearing blamed really want the old one to act up in my hands before I touch the new one just in rare cases the other side is actually causing the feel and fools you sometimes.


Here's the trouble. Techs don't always have this time nor can leave the shop best with you or maybe a good road isn't nearby!


Stuff can still make it tricky. It just isn't when in front of me.


One more: I'd rather be the passenger if bearing thought bad than drive the vehicle! That way can concentrate or jump into a back seat for example and be that much more sure.


In short - you probably need the existing tires anyway all new. Think about how long you'll own this and do this game which folks do up to have to by location and driving situations.


Best I can do - sorry if any typos in that novel!


Tom



(This post was edited by Tom Greenleaf on Aug 25, 2016, 11:00 AM)






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