Nasty rattling near idle/when cold, year 2......
01-31-15, 07:43 PM
#1
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Nasty rattling near idle/when cold, year 2......
So this is the second winter I've had my GX (a 2014 purchased in Nov. 2013).
With radio and other accessories turned off, there is a rattling/grating sound that is quite pronounced at/near idle, especially when cold. Sounds like a rapid PRAPP-PRAPP-PRAPP. This occurs when the vehicle is in Drive, but stopped. Occurs most often at within the first 5 minutes of operation....i.e. leaving the house or office, driving to the end of the street, hearing it at a stoplight or stopsign.
I've posted videos/recordings of it previously, which I have also shown to the dealer. The dealer said they could sort of reproduce, but could not diagnose it. I have tried to crane myself outside of the GX to listen to it, but from outside nothing seems to be amiss.
At first I was worried that it was engine knock/the car eating itself, but if that noise was representative of that, I think the car would be blowing smoke or dead by now. I have not noticed smoke, adverse effect on fuel economy or the noise at speed/under load, as you would expect if the engine were truly knocking. So I'm thinking it may be a fan, some type of underhood accessory, etc. that is the culprit. Sounds almost like a plastic component (fan, pulley, etc.) could be off kilter?? Something that more or less goes away after the engine has fully warmed up and the car has been driven for 10 mins or so.
So 2 questions:
1) Anyone experience this, or similar?
2) Would anyone (in a cold climate, from a cold start) be willing to take a couple minutes to take a close listen and see if their GX behaves as described above under similar conditions the next time you drive it?
Many thanks!
With radio and other accessories turned off, there is a rattling/grating sound that is quite pronounced at/near idle, especially when cold. Sounds like a rapid PRAPP-PRAPP-PRAPP. This occurs when the vehicle is in Drive, but stopped. Occurs most often at within the first 5 minutes of operation....i.e. leaving the house or office, driving to the end of the street, hearing it at a stoplight or stopsign.
I've posted videos/recordings of it previously, which I have also shown to the dealer. The dealer said they could sort of reproduce, but could not diagnose it. I have tried to crane myself outside of the GX to listen to it, but from outside nothing seems to be amiss.
At first I was worried that it was engine knock/the car eating itself, but if that noise was representative of that, I think the car would be blowing smoke or dead by now. I have not noticed smoke, adverse effect on fuel economy or the noise at speed/under load, as you would expect if the engine were truly knocking. So I'm thinking it may be a fan, some type of underhood accessory, etc. that is the culprit. Sounds almost like a plastic component (fan, pulley, etc.) could be off kilter?? Something that more or less goes away after the engine has fully warmed up and the car has been driven for 10 mins or so.
So 2 questions:
1) Anyone experience this, or similar?
2) Would anyone (in a cold climate, from a cold start) be willing to take a couple minutes to take a close listen and see if their GX behaves as described above under similar conditions the next time you drive it?
Many thanks!
02-08-15, 08:04 AM
#5
Extra Noise when Cold
I can confirm I hear a fairly loud "raspy" noise when it's been cold out (say below 40) and the engine is cold. By the time I leave a parking lot it's gone. I just think it's the normal higher revving all trucks do to warm up initially.
Should watch the RPMs to see if the noise corresponds to higher revving when cold.
Should watch the RPMs to see if the noise corresponds to higher revving when cold.
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