Question about 2005 Chevrolet Malibu

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When I accelerate I hear a small rattling I think its coming from the catalytic converter(or the very first muffler/catback right in front of the engine by the radiator) I had it on a lift and confirmed but I can't be sure what the exhaust component that is. Id like to replace it but not sure what exactly it is. I had the same problem with my 95 BMW 520i with a rattling and my exhaust got really loud and my gas milage ate it. It was my cat and all the **** got blown out of it. Does anyone know what it is called on my Malibu?

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  • Chevrolet Master
  • 1,717 Answers

Probably the catalytic converter also.

Posted on May 10, 2017

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Posted on Jan 02, 2017

SOURCE: Terrible Front End noise

I would agree with the hub bearing solution. I also have a 2001 Cavalier and recently replaced both hub bearings. The sound is quite loud and does get worse the faster you drive. Once I got mine replaced, I couldn't believe how quiet my car ran. My dad works with a guy who does a lot of work on Cavalier's and has noticed that first the left hub bearing goes bad, soon followed by the right after about 60,000 miles. 

Posted on Jul 23, 2008

jschoon77
  • 55 Answers

SOURCE: Catalytic Converters

You are correct. That portion of exhaust is indeed a catalytic convertor. This would be in the rear portion of the pipe with a flexible section that goes underneath the oil pan. Then you have a long muffler and a final muffler in the rear of the vehicle.

Nissan Scope Technician- 10+ years experience in Nissan dealership

Posted on Nov 03, 2008

emissionwiz
  • 74945 Answers

SOURCE: I went to Midas with

I have no idea, you will need to contact the dept of consumer affairs and file a compaint with them.

Posted on Nov 04, 2008

tripletauto
  • 1450 Answers

SOURCE: 2005 Chevy Impala exhaust smell

neither one of these would cause gas to leak. sure it is not coolant ? if you think it is gas it is not safe to drive car as it could catch on fire. possible cause would be a leaking injector.

Posted on Jan 27, 2009

BCally1
  • 133 Answers

SOURCE: Replace muffler, not the catalytic converter which started to rattle. Stop running, will crank but will not start. can it be the catalytic converter.

if the converter is rattlin then it needs to be replaced because the element inside is broken. if the jeep still does not run try removing the catalytic converter to see if the restriction is too much. should start if the converter is restricted. if it doesnt maybe its whatever caused the converter to go bad in the first place

Posted on May 28, 2009

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2 Answers

2008 cadillac cts 3.6 codes showing are p2176 and p0420 what does this mean


P2176 is the Throttle Actuator Control System
See the hyperlink below for info on this code:
http://forum.grrrr8.net/showthread.php?t=14603

P0420 is Catalyst System Below Efficiency (i.e. catalytic converter on the exhaust system.)
To check your catalytic converter, get a very light, small finishing nail hammer and tap the catalytic converter lightly, if you hear rattling inside it then it's shot. If your exhaust pipes are rusted through anywhere, get it all done at the same time. You can DIY using parts from Walker Muffler... schematics are available on line, get new hangers too!

Mar 21, 2015 | Cadillac Cars & Trucks

1 Answer

Rattling noise when accelerating


With the Engine cool, locate the catalytic converters, one on the front of the engine and one on the back, start the engine and listen for exhaust, if you can hear the exhaust place your hand near the converter shield ends and see if you feel air movement, the catalytic converter may have a circumferential crack and has broken open. Replace the converter.

Mar 22, 2014 | 2002 Lexus RX 300

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I have a 2004 Chevy Silverado. Upon acceleration there is a rattling sound coming from the engine on the passenger side. it also happen when rolling in reverse and the brakes is applied.


it may just be the heat shield on the muffler, they are held on with tack welds that break easily. when the truck is cool crawl under it and look around the muffler and catalytic converters for a loose heat sheild.

Apr 07, 2011 | 2004 Chevrolet Silverado

1 Answer

I am hearing a rattling sound like a loose piece of metal when I accelerate


Hello, Most common cause of rattling noise is a loose heat shield on the catalytic converter. It's all right to drive in this condition but if the noise becomes too bothersome, you can either remove it or bring it to a muffler shop and see if they will spot weld it or secure it another way. Don't let them try to sell you another catalytic converter.

Thanks

Aug 25, 2010 | 2005 Chevrolet Malibu

1 Answer

While driving when i hit a bump in the road small or large it sounds like something is rattleing,in the front end. what could this be


It could be a heatsheild on the manifold, muffler or catalytic converter. Or on the underbody above the exhaust system.

May 22, 2010 | Plymouth Breeze Cars & Trucks

1 Answer

Exhaust issue


Most likely the heat shield has corroded off and is just sitting on top of the muffler or Catalytic converter. Regardless you can remove the shield and still run the the Xterra without any problems, the OEM muffler came with a heat shield as to the after market mufflers don't have one. The Catalytic converter also has a shield and you can remove it also as the Xterra has a heat shield on the floor board it self. Most exhaust shop if honest will tell you to just remove the rattling shield if there is no exhaust leaks or no Check engine light on that monitor's the Catalytic converter's performance.
A muffler shop if shady may advise you to replace the Catalytic converter and that can go for up to and beyond $400.00, so as long as there is no leaks or check engine light on. Go right ahead and remove the rattling shield.
Thank you for using Fixya

Mar 25, 2010 | 2002 Nissan Xterra

2 Answers

Car makes rattling noise when I accelerate or when it is in idle? What does this mean?


Most common cause of rattling noise is a loose heat shield on the catalytic converter.  It's ok to drive in this condition but if the noise becomes too bothersome, you can either remove it or bring it to a muffler shop and see if they will spot weld it or secure it another way.  Don't let them try to sell you another catalytic converter.

Sep 01, 2009 | Ford Explorer Cars & Trucks

3 Answers

1996 jeep GC after starting sounds like a rattleing noise underneath front, when shutting off loud rattle any ideas


there are two factory free recalls which will replace your catalitic convertor jeep replaced my convertor with 175k on my 1996 jeep also modify your park on tranmition and reprogram you computer all at no charge labor and parts!!!!!!!!!!!!!!!!!!!!!!!!!!

Aug 31, 2009 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Replace muffler, not the catalytic converter which started to rattle. Stop running, will crank but will not start. can it be the catalytic converter.


if the converter is rattlin then it needs to be replaced because the element inside is broken. if the jeep still does not run try removing the catalytic converter to see if the restriction is too much. should start if the converter is restricted. if it doesnt maybe its whatever caused the converter to go bad in the first place

May 28, 2009 | 1996 Jeep Cherokee

1 Answer

Exhaust pipe rattles when car idles. Had muffler


Check the heat shield on the Catalytic Converter, after a few years they start to rust off and rattle. Crawl under the Pathfinder and bang along the Converter and muffler area and see where it's coming from.   Good chances are, it's from the heat shield since you already had everything changed from the Cat back.
Good luck and hope this helps.

May 11, 2009 | 2001 Nissan Pathfinder

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