Christmas jingle
Moderator: volvite
Christmas jingle
So I've noticed a noise I get lately and wondering if anyone has dealt with it before. I'm only hearing it under load, usually somewhere between 2,200-2,500 rpms. Sounds like a heat shield or something similar rattling/jingling around but I can't get it to make the noise at any other time unless it's in-gear and accelerating. It's very obvious in the cabin and you might think it was an internal engine noise, like it gets really raspy for a second or so. It never makes the sound at any rev while in park. I've smacked around the heat shields as well and no noise from them either. Any ideas?
So I was able to replicate it more this morning. Only seems to be noticeable in 1st or 2nd gear and pretty much turns on right at 2,200 rpm. I can hold it there and have the noise remain constant. Engine was fully warmed up and outside temp was 34F. It really sounds more like a buzz in the exhaust/maniford or somewhere under the hood.
That reminded me of something I read awhile back. There is a TSB for the "power valve actuator" NTB05-015b on earlier models and that almost seems like the exact problem. I'm not sure why it only kicks in at lower speeds and not at idle though...that part seems different than the TSB.
That reminded me of something I read awhile back. There is a TSB for the "power valve actuator" NTB05-015b on earlier models and that almost seems like the exact problem. I'm not sure why it only kicks in at lower speeds and not at idle though...that part seems different than the TSB.
the TSB mentions that the rattle occurs @ "around 2,200 RPM"skinny2 wrote:So I was able to replicate it more this morning. Only seems to be noticeable in 1st or 2nd gear and pretty much turns on right at 2,200 rpm. I can hold it there and have the noise remain constant. Engine was fully warmed up and outside temp was 34F. It really sounds more like a buzz in the exhaust/maniford or somewhere under the hood.
That reminded me of something I read awhile back. There is a TSB for the "power valve actuator" NTB05-015b on earlier models and that almost seems like the exact problem. I'm not sure why it only kicks in at lower speeds and not at idle though...that part seems different than the TSB.
that's where you mention that yours makes the noise
it's certainly possible that even though you have a later model, the problem could be related
is yours a VQ40?
I did some more testing last night and it does do it when revving in park. It's just very very light and you really can't hear it easily. For some reason it's very loud while under load.
So I'm pretty sure that's the problem. What I've researched sounds like it's not really an issue beyond the noise. I'd rather not perform the TSB but replace the part if possible. Doesn't look like you can just buy the power valve actuator by itself.
So I'm pretty sure that's the problem. What I've researched sounds like it's not really an issue beyond the noise. I'd rather not perform the TSB but replace the part if possible. Doesn't look like you can just buy the power valve actuator by itself.
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