I have a 04 350Z 6mt and I am experienceing an intermitant grinding noise at start-up. I took it to the dealership to have them look it over but they were unable to replicate the sound, no big surprise.
The grinding sound usually happens after I have driven my Z for about 20mins or so then park it and restart it after about a 10 min. cool-down.
The noise is still present with the clutch in so that would eliminate the transmission as the source. The noise sounds like a gear grinding or something skipping over a gear. It usually only happens for 5 seconds or so then goes away. The car drives fine and shifts fine. The pitch of the grinding noise does increase when you blip the gas a bit. Once when the noise was present I was driving and heard the noise "jump" as I went over a bump.
Any ideas before I drive it into the water off a pier?
350Z Grind at start-up...UUUGGGHHHHH!!!!!
sounds can be so difficult to trace by someone elses discription but I will try to help you isolate its sorce. Where does the noise appear to be coming from? Can you hear it when you are outside the car when it happens? Does the noise frequency sound similar to an electric shaver? or is its frequency slower?
Re: (NISTECH)
well it sounds like a ratte mixed with a little grind in it. It sounds like it is comming from the transmission area of the car maybe the back side of the motor. I took it to the dealership and had them listen for the sound 3 times and it did it but not loud enough for them to notice. As for the sound it is a slower in frequency like two pices of someting metalic that are in rotation are hitting each other. I can hear it outside of the car when it happens.
It is hard to duplicate all the time but usually happens aftr I drive my Z and park it for 10 or so mins. There is no rhyme or reason to the sound.
I know there was a TSB for the VQ series motor back in 2004(03) that called for the CVCTS needing replacement due to grinding noises.
Next step is to drive with a video camera handy and tape the sound the next time it happens.
I LOVE MY Z!!! But this noise is such a pain in the...
It is hard to duplicate all the time but usually happens aftr I drive my Z and park it for 10 or so mins. There is no rhyme or reason to the sound.
I know there was a TSB for the VQ series motor back in 2004(03) that called for the CVCTS needing replacement due to grinding noises.
Next step is to drive with a video camera handy and tape the sound the next time it happens.
I LOVE MY Z!!! But this noise is such a pain in the...
Re: (NISTECH)
No it wasn't...at that time...
Sometimes it is louder than other times. The one time time that it did happen was after driving the car for about 20 mins or so.
I might put it up onto a lift and check to see if the exhaust is loose(doubt it) or if the starter is loose(possible but unlikely). Someone said, which makes some sense, that the starter solinoid might not be fully letting out. since it sounds like it is comming from the center of the engine and the starter is in the flywheel area. Only reason I say exhaust is that I have the Borla cat-back system on my Z.
This is one of those "gremlin" things. When I want the sound to happen it won't do it and when I least expect it, it does. I think my next step is to drive it around town for 20 mins and see if that makes the rattle happen.
If i am able to captue the sound/vid I might be able to attach the sound bit if I can get a good recording.
"MY Z"
Sometimes it is louder than other times. The one time time that it did happen was after driving the car for about 20 mins or so.
I might put it up onto a lift and check to see if the exhaust is loose(doubt it) or if the starter is loose(possible but unlikely). Someone said, which makes some sense, that the starter solinoid might not be fully letting out. since it sounds like it is comming from the center of the engine and the starter is in the flywheel area. Only reason I say exhaust is that I have the Borla cat-back system on my Z.
This is one of those "gremlin" things. When I want the sound to happen it won't do it and when I least expect it, it does. I think my next step is to drive it around town for 20 mins and see if that makes the rattle happen.
If i am able to captue the sound/vid I might be able to attach the sound bit if I can get a good recording.
"MY Z"
This so sounds like an exhuast shield buzzing. Since you have cat back exhaust there are a couple places I know you could look. one would be where the pipes go over a small cross bar just behind the trans, I have seen exhust hit against that. but it is usually more of a knock noise. Another place to look is in the area where the custom exhuast meets with the factory cats. see if any of the shield on the cat or near the new pips are loose. try hitting a solid point on the exhaust with a rubber mallet, A good place to hit would be the flange between the cat and the muffler.
Re: (NISTECH)
Honestly, I don't think that it is an exhaust problem. I know what exhaust rattles sound like and I would bet that it isn't that.
I plan on putting my Z up onto a lift on Monday and checking the exhaust and starter.
I plan on putting my Z up onto a lift on Monday and checking the exhaust and starter.
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s13sr20chris
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Re: (Netko350Z)
it is mostly on start up? scott, do you know if the z33 has the electronic motor mounts? i have heard the maximas motor mounts buzz on start up before.
No I believe it doesnt. If it does though I would think he would more describe it as a whine or hiss noise rather then grind. But what has crossed my mind but I am having a problem with the logic of it and not sure if it would be described as a grind is the ECT motor. I have seen a few of those vibrate on start up.
Re: (NISTECH)
ECT Motor????
Where is that located?
Is that by the "flux capicator" LOL
More Rattle and less grind...a bit like when you stall a car...
Still, I am puting my Z up on a lift tomorrow. I WILL slove this one way or another.
Where is that located?
Is that by the "flux capicator" LOL
More Rattle and less grind...a bit like when you stall a car...
Still, I am puting my Z up on a lift tomorrow. I WILL slove this one way or another.
Well I put my Z up on a lift and looked over the exhaust. I saw that the shield above the cat was rubbing the body a bit so I bent it back. Also looked at that spot that is just behind the transmission that you told me about and saw that one of the exhaust clamps was rubbing against the cross-bar. That's all that I could see that was out of wack. I'm going to keep my ears open and see if that was what was the cause. It makes sense since the metal was most likely contracting after being warned up. I'll keep you posted if any other noises happen.
Thanks....stay tuned!Shawn
Thanks....stay tuned!Shawn