Car Talk: Search for source of rattling doesn’t have to be exhausting | News, Sports, Jobs


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Ray Magliozzi, syndicated columnist

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Pricey Motor vehicle Talk: I have a 2011 Toyota RAV4 with about 95,000 miles on it. Lately, I seen that when I get to about 40 mph, the automobile tends to make a strange rattling or loudish whirring audio.

It sounds like it is coming from just in front of the front seat spot of the vehicle. If I strike the gasoline challenging or just take my foot off the gasoline, the noise stops.

I’m hoping you can support me figure this out. I tried having it to a mechanic, but since they are not receiving an mistake concept on their laptop or computer, they don’t know what it could be. Thank you! — Edie

You have supplied me various outstanding hints in this article, Edie. If only I was sensible adequate to make sense of them.

Basically, I think your sounds is relevant to the exhaust system. My very first guess would be that a warmth defend around your catalytic converter is unfastened and that’s what’s rattling.

Why do I believe that? Effectively, initially, considering the fact that there’s no warning light or personal computer code, that implies to me that it is not an engine concern.

Second, rattling exhaust programs are typically sympathetic vibrations. That does not suggest they experience sorry for you when they vibrate. It indicates that they vibrate due to the fact a thing close by is vibrating at just the appropriate frequency to established them off. And these sympathetic vibrations in vehicles typically come about only at particular speeds.

Third, your catalytic converter is found just in entrance of the passenger seat, less than the automobile — right where you say the noise is coming from.

It is probable that it is not the converter’s warmth shields. It could be a free or damaged honeycomb inside of the converter or some other portion of the exhaust method has arrive loose or is touching one thing it shouldn’t be. But the heat shields are the 1st detail I’d glimpse at because which is incredibly typical.

If you can get your mechanic interested enough, I’d strongly suggest he take a take a look at generate with you and listen to the noise for himself. Very first, it’ll let him to rule out nearly anything harmful. Second, once he hears the sound and the place it’s coming from, he’ll likely know precisely what to do.

If he can’t discover it in the course of a exam drive, he can normally set the automobile up on the lift even though someone else stays inside of it. The driver can then rev the motor to distinctive speeds and check out to make the sound come about.

If they can get it to make the noise on the elevate, the mechanic less than the motor vehicle need to be able to obtain the trigger in a issue of seconds.

Even if he just cannot copy the noise, he might be equipped to uncover a little something under the motor vehicle that is of course free or not linked as it need to be. And if he fixes that, there is a good prospect that’ll make the sound go away … along with a several bucks from your bank account. Good luck, Edie.

EDITOR’S Be aware: Received a concern about vehicles? Electronic mail to Vehicle Discuss by going to the Car or truck Chat web page at www.cartalk.com.

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