Rattle at Startup - G35Driver - Infiniti G35 & G37 Forum Discussion

Aug 19, 2014 | 04:30 PM

Circle_40

Thread Starter

Registered User

Joined: Jul 2013

Posts: 23

Likes: 1

Rattle at Startup

I Have a 2006 Sedan, and for as long as i've had the car (since it was new) there is a rattling sound whenever i start up the engine and begin to drive. It ALWAYS happens when i start it up when the engine when it is fully cooled, after i back out, put it in drive, then start to move, then comes the rattle. It sounds like its coming form under the car or engine somewhere. It lasts less than a second. Do any of you have this problem or know what it is?

Aug 19, 2014 | 04:52 PM

ihiryu

Registered User

Joined: Jan 2014

Posts: 44

Likes: 2

Join the club, sounds like knocking on start up. Pretty common for us, mileage?

Aug 19, 2014 | 05:08 PM

Circle_40

Thread Starter

Registered User

Joined: Jul 2013

Posts: 23

Likes: 1

Around 150k but it's always happened. Glad to see i'm not alone. have you ever asked a mechanic about it?

Aug 19, 2014 | 05:09 PM

Circle_40

Thread Starter

Registered User

Joined: Jul 2013

Posts: 23

Likes: 1

You hear it after you start driving right? it sounds like a metal pan rattling for about a second.

Aug 19, 2014 | 05:12 PM

faiz23

Registered User

iTrader: (2)

Joined: Nov 2006

Posts: 2,198

Likes: 291

From: Your mom's bed

VTC Sprokets

https://g35driver.com/forums/g35-cou...up-engine.html

Quote:

Originally Posted by Sam@GTM

There is a TSB to address a momentary noise after a cold start from the timing cover area,it get mistaken for a timing chain tensioner or guide ,there is a spring that keep tension on the VVT sprocket ,the spring brakes or get weekend witch will cause the noise ,these sprockets are not cheep there are about $500 give or take each. we have seen this problem mainly on the early 03-04 models .

Here is the TSB information from Nissan this was originally discovered on the maxmia/altima VQ35 engines but is also a known cause on the 350Z/G35.

Hope this helps

Sam
GT Motorsports

Last edited by faiz23; Aug 19, 2014 at 05:17 PM.

Aug 19, 2014 | 05:18 PM

Circle_40

Thread Starter

Registered User

Joined: Jul 2013

Posts: 23

Likes: 1

Thanks Faiz, but thats not the sound. it only happens after i put it in drive and start to move. it sounds like a metal pan expanding or something. Rattling is just the only word i can think of to describe it

Aug 19, 2014 | 05:25 PM

faiz23

Registered User

iTrader: (2)

Joined: Nov 2006

Posts: 2,198

Likes: 291

From: Your mom's bed

Could be the heat shield that is loose and rattling. You might also be hearing the chatter from the manual transmission. With the OEM flywheel you will get a small amount of rattle. With aftermarket lightened flywheel it will be much more pronounced compared to stock.

https://g35driver.com/forums/g35-sed...d-problem.html

https://g35driver.com/forums/g35-sed...eatshield.html

https://g35driver.com/forums/g35-sed...at-shield.html

https://g35driver.com/forums/g35-cou...elerating.html

Trending Topics

02 sensor help.

1

29
My new front lip and sides

3

235

Aug 20, 2014 | 11:56 AM

ihiryu

Registered User

Joined: Jan 2014

Posts: 44

Likes: 2

Mine sounds like the videos that Faiz23 posted.

Aug 20, 2014 | 08:41 PM

Circle_40

Thread Starter

Registered User

Joined: Jul 2013

Posts: 23

Likes: 1

Sadly , this isnt the sound i'm talking about, i'll try to get a sound byte to upload

Aug 21, 2014 | 04:14 AM

#10

Gwilly_713

Registered User

Joined: Oct 2013

Posts: 7

Likes: 1

yeah I think I know what your talking about.

It happens even if your engine is warmed up already. Put it in Reverse (and back up), no sound. Put it in Drive, rattling sound appears. To me it sounds like a can with something lose inside it. Then it goes away after the first like 2-3 secs of driving.
Edit: oh I own an 06 a/t Sedan

Last edited by Gwilly_713; Aug 21, 2014 at 04:17 AM. Reason: * oh btw I have an 06 AT Sedan.