Question for awdjdmtalon........about your 555s

[eZg001]

I just had the Nitto Invo's put on and am having a 'singing' noise from the front when freeway driving around 65-75mph. The discount tire rep described it as a 'harmonic resonance' noise. kinda sucks cause I set my cruise around 75 mph on my weekly 3.5 hour commute. not to mention all the $$$ I have dropped on the tires

Are your 555's doing this? I am thinking of pushing them to try replacing the front Invo's with 555's to see if solves the problem.....then trying to get them to swap the rears.

Thanks

[kmech_7]

My set-up is as follows

245/35-20 front255/35-20 rear

Nitto 555-extreme's

and NO, there is no noise i get from them at all......

[eZg001]

Thanks......I'm going to print out this thread and take it to them.

How is the Vortech treating you? I keep going back and forth about my intentions to intall one vs the Turbonetics single turbo kit. I just feel like I would be nervous driving around a non-built turbo timebomb and that the vortech would be much safer. I keep hearing that the build + turbo kit + yada, yada, yada gets up toward $20,000......

[awdjdmtalon]

WOW how did I miss this. Sorry.

No my 555's do not make any noise. At all. I just took a short 1.5 hr one way road trip to GT Live at VIR raceway this weekend. Cruise 70-80 mph the entire way. Car was scary qiute.

[SteveTheTech]

Since there is already a questions for Jerry thread I wanted to add this to the mix.

Now I know crap about VWs but we had this used car in recently that had a belt break and took out the radiator out with the engine room harness. Check out these pics.



Is this abnormal for a V6 model, I have never seen such devistation caused by a broken belt. Ill get better pics later.

[awdjdmtalon]

I have never seen one do that. I have seen the radiator necks break off tho. Get me better pics of the harness that it took out, and email then to me. I can't see pics in post at work. Damn Firewall. I should be able to tell you what they all go to. As for the radiator. You will need to pull the front bumper off to get to it.

Check you email.

[SteveTheTech]

Oh yeah nothing like having to disassemble half of a car to get a radiator, good old German ingenuity.

I think they enjoy making things difficult for the people who have to fix them. I know that if you do that for long enough they make sense. I don't get just because I've spent way to long on Japanese problems.

[Sentientbydesign]

I just had the Nitto Invo's put on and am having a 'singing' noise from the front when freeway driving around 65-75mph. The discount tire rep described it as a 'harmonic resonance' noise. kinda sucks cause I set my cruise around 75 mph on my weekly 3.5 hour commute. not to mention all the $$$ I have dropped on the tires

Are your 555's doing this? I am thinking of pushing them to try replacing the front Invo's with 555's to see if solves the problem.....then trying to get them to swap the rears.

Thanks

Does it sound like a tuning fork that adjusts tone depending on speed?

I've had that problem with my G since I go it. I've had the stock Potenzas, Michellin PS, and now Potenza RE-01Rs up front and all of them have made that noise.

Recently, I took apart my intake and it seems like the sound has a broader range now (70-80 versus 75-80). Not sure if the two are related.

The tech at infiniti tried to blame the noise on the tires, but having used 3 different fronts and 2 different rears, that doesn't work for me.

I've recently gotten an alignment too.

[SteveTheTech]

Nate that sounds like something a little different. The ever so prevalent tire noise is typically noticed mostly on deceleration at <30mph.

Is it is a wheels speed based harmonic noise or transmission related? Does anything change the pitch and frequency of the noise?

[Sentientbydesign]

Is it is a wheels speed based harmonic noise or transmission related? Does anything change the pitch and frequency of the noise?

I can only produce the noise in 6th gear between 70-80 mph with a peak around 75-77mph. I need to take it back to have the service manager ride along, but if you have any insight, I'd definitely appreciate it.

The noise sounds just like a tuning fork.

[SteveTheTech]

I am trying to picture this in my head and think about the situation. I am wondering if it's coming from the transmission of engine. Maybe at a certain engine load percentage and acceleration position. You may have better luck riding with the head tech as the service manager is not a tech, and although some of them know what parts go where they will just have to duplicate it later or try to explain it to the person who will be fixing the car.

What about a small in cabin air leak?

Does it do it any 5 at cruising speed?

When you are in 6 cruising does it change depending on throttle position, what happens if you hold the clutch while at that speed?

[Sentientbydesign]

Clutch and flywheel need to be replaced. They've been in for approximately 35k, but the previous owner was anything but gentle with it.

Noise only happens in 6th at the speeds I mentioned. I haven't heard it in any other gear at any other speed.

I haven't tried to disengage the clutch. Hopefully the car will stay moving at that speed long enough for the sound to continue.

I'm going to check to make sure I don't have any vacuum leaks and do my transmission and diff fluids, then see if the problem persists.

Just to clarify, transmission needs GL-4, right? I bought 5 qts of Amsoil GL-5 before consutling the FSM.

[SteveTheTech]

It does not really sound like a vacuum leak since you do not have driveabiltly concerns at other operating points.

I do however think it may be something in the trans. How many miles do you have?

It could be a combination of bearing in the trans and flywheel, it's really hard to say without hearing it.

[Sentientbydesign]

The only reason I mention a vacuum leak is because the noise seemed to happen on a broader range after pulling apart my intake for measurements

Odometer is approaching 60k.

Thanks for reiterating what the manual says

[SteveTheTech]

A hole I was bored and using the skill you taught me.

Damn I try to help and get an eyeroll. Was the noise there before the new engine?

Did you put the intake back together right

[SteveTheTech]

You know I was thinking about this and I wonder what your ALPHA readings are if you are running rich that would explain you diminished fuel economy. Does it idle alright? Have you tried spraying random flammable cleaning product around your plenum spacer to see if the idle changes?

[Sentientbydesign]

I was hoping you had some specific information as to whether the GL-5 additive package was ok for the MT, or should not be used IN ANY CIRCUM STANCE lol.

Noise was there prior to new engine. Reinstallation of the intake is questionable. I was talking to my father-in-law about the baby and watching him "wash" my K&N drop-in filter with the hose (damn I hate that thing).

Then in the morning, I finished installing the filter only to forget reconnecting the MAF harness

I can't wait to be rid of that whole obnoxious intake assembly. I'll check to make sure everything is tight tonight.

[SteveTheTech]

Use what the manufacturer recommends I have seen bad things happen using the wrong fluid, the friction characteristics are similar but different between GL-4 to GL-5.

Is this what you put in there Amsoil stuff?

[Sentientbydesign]

Thank you.

I got this one. I'll call them tomorrow to see if it's the one I actually wanted for the diff.

http://www.amsoil.com/storefront/svg.aspx

[eZg001]

Does it sound like a tuning fork that adjusts tone depending on speed?

I've had that problem with my G since I go it. I've had the stock Potenzas, Michellin PS, and now Potenza RE-01Rs up front and all of them have made that noise.

Recently, I took apart my intake and it seems like the sound has a broader range now (70-80 versus 75-80). Not sure if the two are related.

The tech at infiniti tried to blame the noise on the tires, but having used 3 different fronts and 2 different rears, that doesn't work for me.

I've recently gotten an alignment too.

Yep.....sounds like the same exact thing. Mine starts a little earlier than yours, like around 65 mph. I just installed a 350Z tube and a K&N filter with stock intake and then put on these new tires. The old OEM tires were pretty noisy so I am not sure if the 'Tuning fork noise' was there or not. To be honest....I was trying to ignore the issue since I had such an aweful experience with a 350Z in 03

I do know that after a dealership tech test drove my car for another reason, they replaced a wheel bearing and ABS sensor....but this was during an install of my camber kits. My car has 28K miles.........could it be a different wheel bearing? I am not familiar with what a bad wheel bearing sounds like.