I dont know, maybe just some welding problem on the pipes ?

Cuz I know lots of ppl *heard* the marble sound(including myself, but now it disappeared), but who actually got some fail engine shortly after the noise occured ?

 

in your case its the intake operating in normal fashion.

 

Your case seems to be normal, I've learned the hard way, lol. I think the noise is just more pronounced in some 8s than others.

 

I have a 04 AT with allmost 30k on it.. I get the sound with 87oct gas then change to 91oct and it goes away. I believe it is Detonation. I've had the recall done and it still does it. I bring it in for Motor -Mounts next week hope it wiil do it for my service writer. I will let you know what they say

 

 

I have a Silver 2004 GT with 36,000+ miles and mods. When I got the car I drove it fast and furious up to 22,000 miles with NO Problems.

After 22,000 miles I started a busness and drove it like a baby to get better mileage. I got the better mileage and marbles in a can when accelerating with clients or up an incline. Took it to my mechanic and he reemed my butt. Had to replace the spark plugs at 24,000. He told me the way the RX-8 is designed and all the flash problems that driving it fast and furious was the best thing for the car. He said screw the gas mileage and enjoy the car and use your Crown Vic for business.

So, now I drive my 8 between 4000-6000 rpm city/fwy/canyons and no marbles just pure rotary power and the mileage isn't bad.

Take your 8's and blow the carbon and unburnt fuel off the plugs and drive them like a sports car and thar shou;d get rid of the marbles


2004 GT 6 spd-Silver-Intake & Exhaust Mods-Electrical Mod-Pulleys-Coolant Mod-Stock K Flashing-Never been to a Mazda Dealer-Royal Purple in engine-trans-diff.

 

Your marbles must be completely different. I redline at least several times a day.

 

I can see Mike Z's point. I do redline at least once per drive and usually more, but I'm often driving at 2000+ rpm since the traffic here is so heavy that using a lower gear is just wasteful. However, my marbles have been disappearing, but they reappeared after the recall when the dealer changed the sparkplugs.

 

Ja my ports opening sound is almost gone with the new plugs from the recall.

I replaced the trailing too, and they had alot of build up at 22k.

 

[QUOTE=Mike Z]I have a Silver 2004 GT with 36,000+ miles and mods. When I got the car I drove it fast and furious up to 22,000 miles with NO Problems.

After 22,000 miles I started a busness and drove it like a baby to get better mileage. I got the better mileage and marbles in a can when accelerating with clients or up an incline. Took it to my mechanic and he reemed my butt. Had to replace the spark plugs at 24,000. He told me the way the RX-8 is designed and all the flash problems that driving it fast and furious was the best thing for the car. He said screw the gas mileage and enjoy the car and use your Crown Vic for business.

So, now I drive my 8 between 4000-6000 rpm city/fwy/canyons and no marbles just pure rotary power and the mileage isn't bad.

Take your 8's and blow the carbon and unburnt fuel off the plugs and drive them like a sports car and thar shou;d get rid of the marbles [QUOTE]



From what I understand, keeping the revs up might help prevent excessive carbon buildup, and once the buildup is there, no amount of "taking it to the redline" will remove it... it's got to be scraped off from the insides with industrial tools??

 

God damn it, i think we shold all write a letter to MNAO addressing this.

I am takin my car to the dealer tmr for reflesh and to fix this issues, hopefully they'll get it fixed. In addition, i will print out all these conversation to let them see how many RX-8 owners are experiencing this. So c'mon on ppl step on and contribue and fight for our RX8

peace

 

I'd be up for it

 

They have................

It's normal......... The ports opening up!

And what noise that make it's louder is fixed with the new flash by making the MOP deliver more oil.

 

If it's normal then why doesn't everyone else have it!!! GARRR!!!!!!!!

It really takes away from the sweet sound of the rotary, and I hate to be the suffering minority.

 

I feel you man. I'm tired of bringing my car to the dealer though, just to have them give it back to me 3 days later saying it's normal.

 

follow-ups, so they were able to trace where the noise coming from. But they dont have time (?) to fix it that day and they need authorization (?). Anways, i have to bring back the car on monday next week -_-..

peace

 

Please let us know where the noise is coming from!

 

Last I checked it was the sound of my at trans just before or when the gears are shifting. I have it on video but you can just hear it. Too much road noise.

 

see this is my point- Dom's tranny noise will not be at all like the noise of th eheater core- but they are both being called "marbles in a can" which makes it sound like the same thing when its not

 

Ok guys and Zoom44, is this specific enough:
1 - Noise comes from the passenger side, more or less behind the gloves compartment and comes from inside the cabin. The noise is high pitched.
2 - It is possible to reproduce the noise on neutral and during any other gear above 7.000rpm (or 6.500 doesn’t matter). If i rev the engine up to 7k rpm and hold it there the noise is present all the time.
3 – The noise can be heard if the radio is turned on (quiet). It almost cannot be heard when windows open (2nd gear + 8k rpm = 100km/h)
4 - Engine performance and acceleration is not impaired by this noise in any way
5 – The engine always runs beautifully between 2k – 6k rpm
6 - I use Shell V-Power Racing fuel 100 octane (engine runs better between 2-3.5k rpm) and Mazda Dexelia Ultra oil. This sound is not knocking/detonation for 100%.
7 - The noise sometimes goes away, but still most of the time is there
8 - The dealer says no service bulletin was issued about this problem

9 - Sometimes I can hear air bubbles rushing (thru the heater core?) after starting up the engine. In my opinion in most of the RX-8 they go away but in my car they together with coolant flowing in large amounts and high speed cause the noise.

10 - You can hear the noise on those new recordings:
http://private.tessel.pl/mazda/noise/rx8noise1.mp3 (best recording between 10-30 second)
http://private.tessel.pl/mazda/noise/rx8noise2.mp3
http://private.tessel.pl/mazda/noise/rx8noise3.mp3

If you can recognize the noise on those recordings and answer “yes” to most of the above questions - than we have the same problem that hopefully will be solved one day It drives me #*!@#*@ CRAZY!!!! grrrrrrrr.....

 

Mike- you nailed it. Exactly what I'm experiencing. The dealers unfortunately can't get it through their heads that it's not detonation. I've brought it in 3 times so far for this, and every time it's the same thing- "make sure to use premium gas." Me: "I'm not an idiot."

The problem is the length of time it would take them to get this sorted out, coupled with the fact that I'll be driving a PT cruiser or something crappy like that in the meantime. Additionally, I don't know if my dealer CAN figure it out because they don't seem to be too familiar with the Renesis... I wonder if I can just get a new one?

 

Yup, I have the same noise. I figure it's probably the water pump.

 

Ja I agree thare are plenty of members who have differnt marbles.
That's why the call this the biggest cry baby forumn on the internet.

I think I'm gonna start another gas milage thread about how the marbles are causing my bad gas milage.

 

You post ***** lol

Call me crazy but I guess I dont have the same prob you guys do.
Look at the first note about the SES Light. Let me quote the service tech stated:"Customer states SES light is on and Engine is making a ticking type noise." Now look at the time date and year .
You guys realy think they are going to get this **** fiured out anytime soon?

 

So I've been listening to my marbles that happens every once in awhile, and I've been thinking that it sounds less like marbles in a can/blender and more like sand in a can/blender. It's not a very sharp sound, rather a lot more muffled. It's almost like mild television or cellphone static. Does anyone else agree with my observation?