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one clunking sound on cold start up

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Old 03-15-2012, 02:22 PM
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one clunking sound on cold start up

ok guys im new to this forum i didnt see anything on my particular problem, or i just suck at searching. i have an 03 g35 sedan with about 120,000mi on it, i get this clunk sound on cold start up its only one clunk, i can feel it in the steering wheel as well, after i drive it and the car is warm or even half *** warm it wont do it again. wondering if anyone on here has had this issue or has any info on this. the mounts are good and the starter is new and it did it with the old starter on as well so i can count those things out. thanks
Old 03-15-2012, 02:32 PM
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somebody?
Old 03-15-2012, 02:33 PM
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I posted this thread right when I got my car because of a similar (hopefully the same) issue. Check it out.

http://rupromenergo.ru/forums/g35-cou...ise-ideas.html

Turns out it was the ABS test that the G does the first time it hits 9-10 MPH on every startup. You can also go on youtube and search "G35 ABS Test" and you will hear the noise I'm talking about. If it's the same, then you have no worries.

Hope this helps!
Old 03-15-2012, 02:44 PM
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thanks for the reply, im aware of the abs test and know when that goes on, but the issue im having is when its sitting still in park and not moving and its one clunk that i can feel and hear on cold start ups
Old 03-15-2012, 02:51 PM
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You got me there...but what might help is if you can shoot a quick ghetto video with your phone or something that will at least capture the sound and upload it to youtube and link it here. Maybe some of the many knowledgable folks on here will take a look at it and help you with a solution.

It worked for me!
Old 03-15-2012, 02:55 PM
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the noise is so faint that im 99% sure my phone wont pick it up, you can definitely hear it in person and feel it, so im thinking the video wont work on a noise im describing, thanks for your help and replys though, hopefully someone will read this and has had a similar issue and chimes in with a reply
Old 03-26-2012, 12:39 PM
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I get the same sound in my 03 5AT Sedan. I've only had it a couple months but it hasn't seemed like an issue yet. I wonder if it could have something to do with the steering wheel being released? If I'm not mistaken the steering wheel is locked when the car is not started.
Old 10-09-2013, 08:45 PM
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Same sound on cold start 04' G35 5AT

Hey guys, I am new to the forums here and I have two sounds that are driving me crazy. The one clunk on cold start I figured out. AC compressor clutch. Not sure yet if the compressor is dying or the clutch itself, but it is definitely the AC compressor / clutch assembly.

One of my master techs said to leave the AC off over night then try the cold start and listen for it. So with the environment controls off it was gone. So to check my theory, I tried a cold start again with the AC left on the night before, CLUNK it was back. So check your AC system for that one.

The other noise that is driving me nuts right now is the clunking sound coming from the passengers side up either above the window or inside of the sunroof area. I thought the passenger seatbelt was banging on the door while driving around, but secured it and the noise continues. It's almost like something is banging around in the body on that side of the car. It sounds like its about shoulder level in the upper part of the door / rear quarter / passenger side roof. If anyone knows what that could be or what to look for let me know.

I have to say I love my G ... great car!!
Old 01-23-2014, 05:03 PM
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Was this clunking noise issue ever figured out?

I picked up my "new to me" '06 6MT with 77k on Monday and it sounds as though I have the same "one clunk" sound on the cold start ups.

I'm a new transplant to the G35 world from a 10+yr love affair with my '96 Impala SS (which was totaled recently)... so, thanks for any help as I learn a new car.

Thanks,
Mike
Austin, TX
Old 01-25-2014, 05:08 PM
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Hey Mike, I still got it- yep it's back! I guess it is the ABS pre-test as was stated in earlier Posts. (sounds almost like something is going to jump out of the hood immediately when turning the key cold, right?) I may have to haul it to the dealer for the $140 dollarish inspection / verification.

The knock sound around the roof on the passengers side is still there too. Sounds like a loose piece of metal or plastic bumping around in the body/roof upper passenger side when going over a speed bump or rough spot on the road. Edit: this knock sound in the roof area is NOT all the time- only certain SLOW bumps when going over stuff is when it happens. Any suggestions would be welcome.

On another note, the gasket that connects the oil filter/cooler adapter blew out. Nothing severe. The part at infiniti was like 5 bucks. I changed the oil to Amsoil. 5w-30 signature line full synthetic OAP-IV. (I deal with Oil daily and yes have a very good understanding of how it works)- I read that the gasket goes out about 60k miles and both Nissan and Infiniti change them at about that mileage. The factory crappy one is Orange. You're at the right mileage to check it anyhow, so I recommend on your next oil change to go ahead and change it.
Old 01-25-2014, 07:29 PM
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Quote:
Originally Posted by Mospeada View Post
(sounds almost like something is going to jump out of the hood immediately when turning the key cold, right?)
That's exactly what my car does. I feel like the engine mounts are to blame. I feel it through the clutch pedal too when the engine starts. It's like the engine moves upwards and hits the hood right when the engine starts. Wonder what it could be??
Old 02-05-2014, 05:22 PM
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Hey guys not sure if anyone figured it out yet but I just got my 03 G35 sedan over the weekend and the last 2 days I get the one clunk sound. hope its nothing major and it's definitely not the ABS test. there was a post a little farther up that said try a video I did and you really couldn't hear it so the video didn't work for me, but you can feel and hear it in person.

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clanking, clunk, clunking, cold, coupe, crank, g35, rupromenergo.ru, hearing, noise, sound, start, startup, test, thud
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