The thing is - they have NO idea. If they found out why, they'd tell me by now, and probably have it fixed.

Again, in my case, there's no power loss, just that 'marbles in a blender' sound at ~7300 RPM all the way to ~7900. It's not horribly loud either, but it's a little annoying. I can live with it, assuming it doesn't affect my engine especially when my warranty is up. But I'd rather find a solution.


Another excuse by the guys at the dealership is that I shouldn't be revving that high. Well, no, I SHOULD be revving that high with the rotary. Of course, I usually shift at around ~3500 but when I'm having fun with the SPORTS car that I purchased, I don't need that rattle.


And I've tried 93 octane from a bunch of different gas stations, including Shell. I'm thinking about trying this octane booster stuff I saw at Autozone.

that is unnacceptable- if its normal then they should be able to tell you why its normal. get it in writing. calll MNAO and ask for the explanation to be provided. nobody should walk away from a "its normal" without a full explanation/education about what makes it normal-this issue or any other anytime.

Raptor2k are you anywhere near Austin?

Yes, about 3 hours away, Arlington is a sub-urb of Dallas. I'll try calling MNAO later.

I have the same rattling noise on my 8. It has 3400km on the odometer. This happens also when the car is not moving, and I press the gass pedal, on around 7000rpm's I hear this marbles in a can sound. When I open the passenger door,or the passenger window,I can't hear it. Maybe it's because of the outside noise,that I can't hear it. I am not sure.
When I went for my first oil change, they said it's normal. The told me:"Wait and on the next oil change see how it goes..." I didn't insist at that time, because I had no more time...
I think I will try to go to another authorised dealer to check it out.
I hope that my motor is not going to malfunction because of this...
Hopefully it's new and I have the warranty...

see im almost 100% sure that you are hearing the normal S-DAIS operation- i doubt you have an issue

yeah if its making that noise and it runs perfect, i guess its the sdais. but when ur car falls on its face over 7k, hence my issue. im thinking its kocking. 18 more hours till i compression test her....yay

I went to another authorized dealer just a few hours after my previous post.
This dealer is the biggest in Greece.
They heard it and told me that it's not coming from the engine,but from the passenger side dashboard. They told me to take it in on Monday to pinpoint the source of this sound.
Something on the dashboard is loose, from the assembly line in the factory, an it is vibrating at around 7000rpm. Whatever it is,it will be covered by warranty. I will update you on this issue. Hope it will be sorted out on Monday!!!

great. nice hijack.

Keep me updated. It's around my dashboard (probably more near the hood) on the passenger side too

anyone else find it NOt a coincidence that that is where the complicated intake system is situated. hello

My car started really hard this morning and ran really rough for several minutes and was running kinda sluggish for the first few miles, then seemed to be close to normal. I was thinking it was probably the gas. I had filled it up on Saturday and then hadn't driven it since then, except to get home. I got gas at a station different than normal since I was at a point where I really needed to get gas and not near my usual two Chevron station choices. I ended up getting Shell this time. I only put in premium gas, ever. My mileage doesn't appear to be doing so well this tank either. I called my dealership and they said it sounds like something with gas but if it is still doing it after I use up the tank on new gas then to bring it in. I didn't have any "sounds" though.

Hmm...still thinking whether I should try an 'octane booster' and seeing how that goes...

Don't do it Raptor. Those things are just plain bad. I brought mine in for the "marbles in a blender" noise above 6k, and they gave it back to me saying they couldn't find it, 2 days later. So I put the service guy in my passenger seat and revved in their parking lot to 6 or 7k. Clear as day. I wonder if these guys just skip certain cars at random, and not even turn them on? Anyway, the guy said it's most likely some part of the dashboard rattling. I was in a hurry at the time, and said I'd bring it back in next week... But I call BS on this one.

Sorry, it's above the intake system, and if I'm not mistaken the cat as well. It only happens at RPM's and unless there's about twenty loose pieces in the dash, it's not coming from there. I'm more than a little disappointed over all the little QA things that Mazda misses on our cars. This is the fourth non-scheduled dealer visit since getting my car 2 months ago new. You'd think for a 30k car they'd care how satisfied their customers were and make it right the first time. :mad:

sucks

zenmoused, where are you in NC? Im a tech at Flow Mazda in fayetteville. If your near the fay. area you should stop by. We wont b.s. you like most other dealers. If you can you should come by because I am very curious about the noise you all are hearing. If you are going to stop by PM me and I will give you the # to set up an appointment.

I finaly found the time and took it to the dealer today. They were checking it for 2 1/2 hours.
They discovered that it is coming from a little cooler that is located inside tha dashboard. (I saw it myself.)
The cooling fluid is circulating there realy fast and it's causing this rattling noise. They said that it is better to send an email to mazda - japan and describe the problem, so they can tell them what to do. Maybe if your dealers do the same, they will issue a TSB.
When they temporarily shut of the cooling fluid circulation the rattling noise stopped. Maybe there is something wrong with the tubing or the radiator making a turbulent flow of the cooling fluid.(My guess)
In 2 to 3 days they will inform me what Mazda-Japan has to say about this issue.
They informed me that there is no problem with the car and nothing is going to happen to the motor. I am covered now because the issue is documented.
I hope this problem will soon be resolved.

FuryCustoms- I'm located in Chapel Hill, so it's unfortunately a bit of a drive. If they can't do anything for me down here next week when I take it in, I'll definitely take you up on that. It would be really nice to have a dealer I can take it to that isn't full of it.

I guess it is the a/c evaporator you are talking about? I know that the a/c system cuts out at a certain rpm to free up more hp for the engine. So is the coolant bypassing to relieve pressure on the system?

hence how hard it is to accurately diagnose a sound you cant hear yourself. he's talking about air gurgling thu the heater core or AC evaporator

I have a rattling noise on my car as well.
Mine sounds different than the ones I've read in this thread though.
I only hear mine when driving on rough roads.
My subdivision has a cobblestone entry, and when i'm driving (30 mph? or more) i hear this metallic rattle. sounds like thin metal vibrating against thin metal.

I just bought the the car used.
I think I'll have it checked out.
Has anyone else heard this noise?

Dealerships have the tendency to say "it's normal" when they have no idea of what's going on.....

True

Still have to call the guys in Austin, zoom44, lol. But before that I'm gonna try another dealership that's about half hour away when I get the time. It's Freeman Mazda in Irving, I've heard their service is great.

owners have a tendancy to accept "its normal" without an explanation as to why and then come here and ask us to diagnose. why dont they just get an explanation from the service person?

subdivisions- does it have an aftermarket exhaust?

Wow, i have the same issue...it sounds like clicking, or gravel in a metal pipe being shaken around...or like a strange high frequency rattle...hard to explain, but i think it's just what yyou are talking about!