So I've always noticed that when cold starting the Q it makes a fairly pronounced rattle/knock noise for the first 10-15 seconds then goes away. Anyone have any insight to what that is or have the same noise? I remember on the G37 similar cold start sounds but the Q's is soooo much more noticeable because after that initial 15 second window its absolutely gone and sounds wonderful. I've theorized that it's the timing chain but why would it make that rattling sound for 15 seconds then turn off like a switch. It's too clean of a stop in sound to be because of heat buildup, the cutoff sounds intentional almost.
Cold Start Engine Rattle Noise
LoganB
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Right, I'm referring to the metallic rattling sound, it sounds like a soda can is loose in the engine bay somewhere. Let your engine get up to temperature, then roll your window down and give it a few very light pumps on the throttle (maybe your sport exhaust will drown it out), and see if you hear the rattle noise when the engine is in the 1.5-2k RPM range.
All I'm saying is that I think the engine is doing it all the time (in that RPM range at least), it's just more obvious during a cold start since it's idling at higher RPMs.
I'll check it, but I know that sound at cold start drops out while higher revs are maintained during warm-up. I don't touch the throttle and let the car warm-up for at least 2 minutes as I always use the trip timer. I always back out and pull into my garage with the radio off so I'm totally aware of the sounds the car makes. I can even hear the front tires squeak against the garage floor as I turn the steering wheel.
Now, like I posted there is a turbo diesel sound when the car is just creeping under light throttle, but it's a much more subtle sound than the rattle that occurs during the first moments of a cold start.
Maybe I'll just have the dealership take a look then. If you haven't heard it, then it may not be normal and perhaps something really is loose in my engine bay
Have you checked your drive belt? Here's the link: http://www.infinitiq60.org/forum/20...n-forum/5769-infiniti-service-bulletin-regarding-timing-belt-issue-failure.htmlMaybe I'll just have the dealership take a look then. If you haven't heard it, then it may not be normal and perhaps something really is loose in my engine bay
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So I tried the remote start while standing next to my car this morning. I didn't hear any rattle but I definitely heard a bunch of sounds that seemed to surge and drop off (almost precipitously) after a certain period of time had elapsed. The surging sound I heard sounded to me like the engine rpm surging and injectors potentially being cycled (which is something that is usually built into the software code for most engines but especially critical for DI engines).
I'll try it again tomorrow or in a few days time and see if I notice anything different.
Now what I have noticed is that my car has a tendency to shudder (there is almost a set frequency to it), while driving at low speed or at highway speed around 2500 rpm. It goes away as the car warms up so I'm not sure what it is for sure but I'm thinking the crappy tires might be to blame. They might be flat spotting slightly from sitting (I hadn't driven my Q60 in a couple of days) causing the shudder that goes away as the tires warm up and go back to "round". Either that or there is a fail safe built into the engine/programming somehow to protect it around that rpm while cold.
I'll post up 2 wk driving impressions in a few days time but I'm definitely not regretting this purchase or the long wait to get exactly what I wanted.
I'll try it again tomorrow or in a few days time and see if I notice anything different.
Now what I have noticed is that my car has a tendency to shudder (there is almost a set frequency to it), while driving at low speed or at highway speed around 2500 rpm. It goes away as the car warms up so I'm not sure what it is for sure but I'm thinking the crappy tires might be to blame. They might be flat spotting slightly from sitting (I hadn't driven my Q60 in a couple of days) causing the shudder that goes away as the tires warm up and go back to "round". Either that or there is a fail safe built into the engine/programming somehow to protect it around that rpm while cold.
I'll post up 2 wk driving impressions in a few days time but I'm definitely not regretting this purchase or the long wait to get exactly what I wanted.
When I've started the car, I don't think it's been below 40 degrees. It may act and sound differently in lower temps. I'm pretty sure the cold start sounds I'm hearing are programmed and normal.
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Places go down to 40 degrees
j/kIt was in the upper 50s this morning so I'm not sure. I think it may get close to 40 Wednesday night so may try it again Thursday morning.
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Hmmm. if it does weird noises at 40 degrees, wonder what'll it'll do in -40.... haha.
Good thing its warmer now and hovering around 14 degrees Fahrenheit. Should be able to see what kind of noises mine does by Friday, or at the latest Tuesday as thats when my car is expected to be delivered.
Good thing its warmer now and hovering around 14 degrees Fahrenheit. Should be able to see what kind of noises mine does by Friday, or at the latest Tuesday as thats when my car is expected to be delivered.
Nope, it's not that kind of sound.
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I have the same. Noticed it while driving next to a wall with the wndow down. Low speed, powering on 1500-2500 it rattles like a loose manifold or oil pan, sounds like a tin can. If it was coming from the back i would say a loose exaust. It happens while in park too you just go threw the 1500-2500 so quik its hard to hear it. Anyone got new info before i go in next week for a maybe useless service?
I haven't made time to take it to the dealership yet, so I'm excited to hear what they say about yours. The noise you're describing is the exact same as mine, which seems to be a little different than what other people are describing (since they say it definitely goes away after the 30 second mark, which in our case it does not).
I've checked my belt and it has the proper clearance on the pulley, and my VIN checks out as non-affected. So hopefully it's just something loose, nothing major. Based on the RPM and engine load when I hear it, I almost wonder if there's something noisy about the wastegates or actuators.
I need to get my oil changed anyway (don't want to wait for the 10k mark), so hopefully I can get it in sometime this week or the next.
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Mine does the same thing but to me its more of a ticking sound. Happens at startup and for about 20sec (18 to be exact lol) then goes away or gets very quiet. I have a hard time thinking there is something wrong since we all are hearing some similar noise. Not sure exactly what it is but I wish it wasn't there as it takes away from the engine sound. BUT... I still love the car!
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Yeah the sound coahman and i are talking about, Allmine, doesnt happen at start up(i get that clicking noise but just for a sec cause where i am is always warm) its more when the engine is beginning to torque up in the low stages of the rpm range, 1500-2500, it almost seems like a frequency that the engine is hitting during that rpm range vibrates something to rattle. I guess this is really the wrong thread for our issue if it is an issue. i will still post my service results here since it is the place of topic right now. Need the service before my intake and exaust get here just to be safe.
On the start up ticking again, i have owned 3 infinities now (FX35, QX70 previous) and all 3 sounded like tractors at some point in their operation and the other 2 where bullet proof so i bet the same for this Q60. I think the clicking is cause of How lite the oil is so it settles more completely and it takes a bit to get it to the top of the engine. Just a non-tech thought.
On the start up ticking again, i have owned 3 infinities now (FX35, QX70 previous) and all 3 sounded like tractors at some point in their operation and the other 2 where bullet proof so i bet the same for this Q60. I think the clicking is cause of How lite the oil is so it settles more completely and it takes a bit to get it to the top of the engine. Just a non-tech thought.
At cold start up my sport exhaust is loud as F and idle is about 1200. It stays that way for around 20 seconds, then the RPMs jump to 1300 for a second, the exhaust suddenly quiets and idle is back at 1200.
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The wife noticed the rattle at start up. I'm not too worried about it. What is disconcerting however is that the car seems to surge repeatedly (rpms stay level around 2k rpm) while driving for the first few mins at low speed or in high gear (i.e. highway speed). I thought at first the tires might be flat spotting but I don't think that's the case. I know the dealer won't be able to replicate it so I'll just drive the car till something happens...I've got a warranty after all...might as well use it.
In my case, the car kinda jerks up and down during this period of time. It's almost like my car is having an identity crisis and would rather be one of those hip hop dancer cars or whatever belonging to Snoop Dogg or Snoop Lion or wotever he goes by now. It goes away eventually and the ride smoothens out leading me to think the suspension might be to blame.
In my case, the car kinda jerks up and down during this period of time. It's almost like my car is having an identity crisis and would rather be one of those hip hop dancer cars or whatever belonging to Snoop Dogg or Snoop Lion or wotever he goes by now. It goes away eventually and the ride smoothens out leading me to think the suspension might be to blame.
That sounds like you should definitely take it to the dealership. It shouldn't be doing that.
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Well the dealership said they can hear the noise and it seems to be the plate that protects the transmission oil pan vibrating. Nothing else was wrong so it seems to be just the way it is. Good to know nothings wrong. Side note i asked about intake and exaust voiding warranty and the service rep said it will only void the three way cat on the exaust.
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Sorry, I just saw your response Coahman.
I may bring it up when I'm at the dealership on Friday so they can record it...but it stops after a very short while (it lasts maybe a 30-60 seconds), so I know the service dept won't be able to replicate it at all.
#FirstMYTeethingIssues #BAH-Humbug
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