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#4519828 - 09/18/17 10:13 PM My 08 Mazda6; Inside cabin whining noise
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
I had developed two minor problems recently;

One is body vibration thru my car that's coming perhaps from the engine bay; it is a very hard to point out th source because once you get outside you cannot hear what's the issue; I can hear it but someone else I doubt it when I turn the engine off there is like rattle/vibrate sound that comes from the left side of engine bay; it lasts like less 1s. One really need closely to listen in order to hear it;

Second one and that is more of concern to me is a whining/buzzing sound that reminds me of a current throughout the cabin; when you play with lights or door/window switches it change its sound; when you hold the parking hand in hand you can feel like a current/vibration in it; again once you stepped outside you barely can hear it; my initial thought is that could be fuel pump, but the car still cranks up at first or have a performance gas efficiency not changer to my knowledge.

All original parts on it to this day. Help

I Thank You
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2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4519851 - 09/18/17 10:46 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
SF0059 Offline


Registered: 08/06/12
Posts: 789
Loc: Lynchburg, VA, USA
For your first problem, I can almost guarantee that the rattle is your upper motor mount. They are fluid filled and they will split and spill the fluid. Look on the wheel well underneath the mount to see if there is staining from the leaking fluid. The symptoms sound very much like the mount.

As for the whining noise... I have no clue there.
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2014 Honda Odyssey EX-L/RES: 54K mi, M1 0w-40 & FU, VCMuzzler V2
2017 Mazda 6 Touring 6MT: 22k mi, M1 AFE 0w20, OEM Filter

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#4520060 - 09/19/17 07:44 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
TinyVoices Offline


Registered: 09/12/16
Posts: 485
Loc: Vienna, VA
Definitely upper motor mount. Super common issue with these cars. It's fluid filled. Any shop can do this for an hour labor plus parts. I had a mazdaspeed6 and I had 2 upper motor mounts fail (same mount design but different engine) in 2 years before going to aftermarket performance mount.
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1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
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#4520104 - 09/19/17 08:50 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Thanks for your input all good people!

I was wondering what is the easiest way to check for engine mounts, especially the one with fluid, perhaps to use a floor jack and lift a engine somewhat up and see if there is change in sound

Also what is the easiest way to test fuel pump, something that I can do before I take the next step
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4520155 - 09/19/17 09:53 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
HVAC blower bearings.

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#4520166 - 09/19/17 10:08 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: SF0059]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2569
Loc: MN
Originally Posted By: SF0059
As for the whining noise... I have no clue there.
Solution: Let your mother-in-law out of the back seat, or trunk, whatever.

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#4520218 - 09/19/17 11:35 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
a HVAC Blower issue seems so easy to spot it
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4520267 - 09/19/17 12:42 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Guess what... It just died on me cry luckily on my place of work


It cranks but it wont start
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4520282 - 09/19/17 01:00 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
Chester11 Offline


Registered: 04/13/17
Posts: 130
Loc: PA
I was going to say the trans mount might be shot (it's on top of the trans, driver's side). But it sounds like you have bigger problems now.

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#4520341 - 09/19/17 02:00 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Thank You Guys!

I am buying the parts today $300

tomorrow Ill be wrenching it

Motor mountains will be next on my to do list
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4520688 - 09/19/17 08:28 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Here is an update;

After the job today, the car started after several tries sequentially, so I got lucky and I got it to my home; now I got an Delphi fuel pump at AutoZone and I got the tool to untie the pump; I took the seat cushion out exposing the pump position; I tried to start the car but in vain; that sound when you give power by turning the key (like valve opening) is now missing, so my question is whether is this a pump related or the relay related; of course no whining sound while car is down sound until you started it

Again thanks for all your suggestions!
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4521068 - 09/20/17 09:36 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
I have parts ready, so I was wondering how difficult is to the job, on a scale 1-10, and what I should watch for in the process, please

I Thank You


_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4521965 - 09/21/17 08:08 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Job's done and I got my freedom back again grin

_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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#4522273 - 09/21/17 02:14 PM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
Chester11 Offline


Registered: 04/13/17
Posts: 130
Loc: PA
so it was the pump? it looks like the cover is sealed with silicone? or am I seeing a reflection?

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#4522967 - 09/22/17 08:44 AM Re: My 08 Mazda6; Inside cabin whining noise [Re: miden851]
miden851 Offline


Registered: 02/15/16
Posts: 433
Loc: GA
Yeah it was the pump, on the way out; I'd replace it now then be stranded on the road next; no silicone, just a reflection from gas;
everything went smoothly except for the screws that hold the flange and the pump secured; they were rusty and very soft made so I needed to take them out with a drilling bit and extractor; I went to home depot and got stainless steel screws this time...
_________________________
2008 Mazda6i GT; @195K miles
2016 Honda CR-V EX-L; @29K miles

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