Infiniti G37 noise when accelerating after stop
#47
Registered User
I had a very similar sound about 6 months ago. Under normal acceleration I only heard it, but under hard acceleration it would bog down. It ended up being a spun bearing on the water pump. Also, since it was the chain making the noise, you may want to check your chain guides. They are essentially designed to go bad at about 60k.
#48
I had a very similar sound about 6 months ago. Under normal acceleration I only heard it, but under hard acceleration it would bog down. It ended up being a spun bearing on the water pump. Also, since it was the chain making the noise, you may want to check your chain guides. They are essentially designed to go bad at about 60k.
#49
Registered User
when you changed the chain and guides did you change the water pump? They're, like, $40, and since you're already in there you may as well do it.
as for the noise, I'm in for when you finally find out what it is
as for the noise, I'm in for when you finally find out what it is
#50
The water pump spins regardless of what you are doing, so it should also make this noise when you rev in park or under any number of other situations, which it does not. Any noise from the timing chain would be present most of the time
Last edited by Victory; 11-25-2017 at 01:10 PM.
#51
hey guys
i think its about "Carbon deposition"
last week i add "LIQUI MOLY VALVE CLEAN" at first it doesnt make any differents
but next day after 20~40km it reduce that noise Significant
so i decide using additive repeatedly until next maintenance
and i already reservation piston carbon remover and cleaner next maintenance
ill let you all know
i think its about "Carbon deposition"
last week i add "LIQUI MOLY VALVE CLEAN" at first it doesnt make any differents
but next day after 20~40km it reduce that noise Significant
so i decide using additive repeatedly until next maintenance
and i already reservation piston carbon remover and cleaner next maintenance
ill let you all know
#52
hey guys
i think its about "Carbon deposition"
last week i add "LIQUI MOLY VALVE CLEAN" at first it doesnt make any differents
but next day after 20~40km it reduce that noise Significant
so i decide using additive repeatedly until next maintenance
and i already reservation piston carbon remover and cleaner next maintenance
ill let you all know
i think its about "Carbon deposition"
last week i add "LIQUI MOLY VALVE CLEAN" at first it doesnt make any differents
but next day after 20~40km it reduce that noise Significant
so i decide using additive repeatedly until next maintenance
and i already reservation piston carbon remover and cleaner next maintenance
ill let you all know
I also use top tier 93 octane gas almost exclusively and toss a bottle of similar cleaner in every other oil change. Should be squeaky clean. still get it every so often.
#54
Registered User
iTrader: (3)
Just checking in. I spent almost an hour on an undeveloped neighborhood street with a buddy and I taking turns stopping/driving the car and standing outside trying to re create the issue and never made the sound. Then, this morning I heard it leaving the gym. I don't get it. I'm gonna mount a GoPro under the hood and see what happens.
#57
Are you guys all able to feel it at all when the noise occurs? For example, car shuddering (even if it's just slight)?
Or is it purely just a noise that you're hearing?
Any performance drain or drag when the noise is occurring?
Has anyone run any live scans (feature on some OBDII scanners) while the noise is occurring, and noticed anything particularly different?
Too bad there's no tool or device out there (certainly at least not one that I've ever heard of) that we can buy to triangulate sounds. On the G37's it'd be pretty easy since we have clean mountable surfaces.
You could mount 1 sensor on the Brake Fluid cover, another 1 sensor on the Battery Cover, and another 1 sensor towards the front-middle (this one of course would need to be the most heat resistant). In this way the sounds received by the 3 respective sensors could be easily calculated to pinpoint ~where the sound is actually coming from (ex: if it's where the Transmission is, or the Engine - both completely different!).
The sensors, if they had two receivers (top, bottom) could even pinpoint it further 3-dimensionally, making it even MORE precise - ex: if it's towards the TOP of the Engine specifically (eg. Camshaft), the Bottom of it (eg. Crankshaft), "Left" (opposite end of Transmission, eg. Timing Belt), etc.
Regards,
- BioG37
Or is it purely just a noise that you're hearing?
Any performance drain or drag when the noise is occurring?
Has anyone run any live scans (feature on some OBDII scanners) while the noise is occurring, and noticed anything particularly different?
Too bad there's no tool or device out there (certainly at least not one that I've ever heard of) that we can buy to triangulate sounds. On the G37's it'd be pretty easy since we have clean mountable surfaces.
You could mount 1 sensor on the Brake Fluid cover, another 1 sensor on the Battery Cover, and another 1 sensor towards the front-middle (this one of course would need to be the most heat resistant). In this way the sounds received by the 3 respective sensors could be easily calculated to pinpoint ~where the sound is actually coming from (ex: if it's where the Transmission is, or the Engine - both completely different!).
The sensors, if they had two receivers (top, bottom) could even pinpoint it further 3-dimensionally, making it even MORE precise - ex: if it's towards the TOP of the Engine specifically (eg. Camshaft), the Bottom of it (eg. Crankshaft), "Left" (opposite end of Transmission, eg. Timing Belt), etc.
Regards,
- BioG37
Last edited by BioG37; 12-20-2017 at 06:44 AM.
#58
Registered Member
I hear the same noise since September. At first i thought who is driving a rusty bucket, but later on i figured out it was me, and my car making the noise.
my car is only 69k and it's pretty disappointing. Also the car is producing another rattling noise from the heating core, which is different noise. Darn my car rattkes from front and rear. Time to get rid of it?
my car is only 69k and it's pretty disappointing. Also the car is producing another rattling noise from the heating core, which is different noise. Darn my car rattkes from front and rear. Time to get rid of it?