Question about 2005 Subaru Impreza

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Exhaust rattle i have a 2005 wrx with an exhaust rattle/leek when off exceleration. 3 people have now looked at it & they can not find the noise. what can it be?

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  • 507 Answers

Heat shield,muffler baffle,pip not hitting/rubbing somewhere,bang the mufflers and cat with your hand to hear any loose baffles etc.you need to check it on a hoist but the 4 post type you drive on so the suspension is like it is wehn on the road to see if any thing is hitting, you just need to take your time to look and feel you will work it out,its not too bad aproblem

Posted on Oct 29, 2009

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Posted on Jan 02, 2017

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My 2005 Nissan Morano S makes a rattling noise when accelerating. More so after the car has been sitting. Less after I driven awhile.Taken it in 3 times and no one is able to diagnose.


Hello Lisa,
Rattles are always a fun thing to chase after. The first thing that comes to mind with a rattle under acceleration would be a heat sheild. Over time, heat shields which protect the under body of the car from exhaust heat come loose. Might want to have an exhaust shop take a look at it for you. I have heard of weak tack welds located on the heat sheilds by the catalytic converter. So you can ask an exhaust shop to take a look.

Although if you are one to get down under the car and a bit dirty check it out on your own. You might be able to check without putting the truck on a jack stands or a lift. Basically you will want to ensure the car is cold. If the car has not sit for a little while, I would not recommend touching the exhaust. YOU WILL get burned. :) Once your sure its cold and want to squeeze under the truck you can follow the exhaust tips all the way up to the catalytic converters. See pic below(number 16 is the heat shield). You will see the tin around them and be able to shake them a bit. If you hear your rattle there is your problem. If not check out the other heat shields.

rltofixya_0.gif

Good luck

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1 Answer

My Cady has developed a rattling noise under that increases when I accelated


A common cause for the "rattling" noise you've described is a loose heat shield for the catalytic converter. Many times, a weld will break loose leaving you with a hanging heat shield that vibrates and "rattles" while you drive. A trip to the muffler shop should be able to confirm this. By itself, a loose heat shield is not something major.

Another cause could be a loose exhaust hanger that holds the exhaust firmly in place. It too would tend to rattle more as you drive. Either way, it would appear on the surface that your issue is exhaust related. Best of luck and thank you for using Fixya!
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Rattling noise coming from my 2005 mazda 6's engine. it only happens when i drive slowly such as going through kfc drive through


Good evening.
If this is a tinny type of rattle and it only happens at certain RPM's I would look for a loose heat shield over the exhaust pipes. Have someone apply the throttle until the rattles begins and listen under the car with a long screwdriver or a yardstick. Use the screwdriver to push on the various shields surrounding the manifold and pipes until the rattle stops. then use a hose clamp or two to tighten them up.
Also I see a lot of catalytic converters that become loose internally and rattle around inside it.
The only cure for that is to replace the converter.
If this rattle is an internal engine noise you should have an experienced mechanics ears give you an opinion.

Thank you for using FixYa.

KL

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Have a look at the shrouds around your exhaust system, they are prone to shaking loose and rattle on over run.
Try giving your exhaust a bang ( with your hand when it is cold) and see if it causes the noise . Follow the noise.
Sometimes the baffles fall off inside the muffler and rattle around inside too.
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check all things are tight like exhaust & fan etv & not rubbing
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also look for wear marks from rubbing! shiny bits

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had the same issue, had someone look and it seems the noise was caused by heat shield being loose covering exhaust system. Have that checked out.

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