Question about 2002 Subaru Forester
I bet its just a the heat shield on the catalytic converter. Subaru uses very thin metal and the heat shield is bolted as opposed to welded together. This rattle is extremely common on subys.
mrmopar is right that you should replace it.
however there is a quick fix that will stop the noise. Go pick up a 6" stainless steel hose clamp at the hardware store. put the hose clamp around the cat. It should be obvious whats loose when you look under the car.
if you are a little handy its not a hard job to do your self. Just 4 bolts. You can get a catalytic converter for $200 online. Get the gaskets too. shouldn't take more than an hour or two.
You will need to put the car on jack stands or rhino ramps to get access. Once you are under the car, the parts are easy to get to.
Always, always chock the tires when your under the car. You do not want a car to fall on you.
Posted on Jun 19, 2009
The rattle in the catalytic converter is usually a warning that it is about to fail as the catalyst breaks up it will fall apart. and eventually plug your exhaust. I suggest going to you exhaust shop and having it replaced. because it will start pluging up on you. Please leave rating for me
thank you and i hope this was helpfull for you
Posted on Apr 21, 2009
I have a brand new Forester (less than 50 miles) and it has an exhaust rattle when cold (at low RPM after the initial warm up minute or two) and in park or neutral and it seems to be coming from the catalytic converter. I crawled underneath and if I press against the side of the converter the rattle stops. But then as I was crawling around under there the rattle seemed to be closer to the front of the engine. There is a point where the exhaust pipes come down from the manifold and comes close to the pipe going to the converter. I thought maybe when cold the shields at that point are tapping one another, but I couldn't see it happening. The shields aren't loose and the rattle stops after the engine warms up. So, then I was wondering if a new catalytic converter needs to be broken in and tends to rattle when new.
Posted on Aug 18, 2010
There are 2 answers to this, and you need to figure if it is coming from INSIDE the Cat, or OUTSIDE. Subaru's have a bunch of exhaust heat shields and they are prone to rattling as they age. The easiest fix is to get a muffler clamp and clamp the heat shield that is rattling. If it coming from inside the Cat, you are due to replace the Catalytic Converter as the inside is breaking up and will start to clog the system. This will eventually break down and cause you to have no power.
Posted on Sep 20, 2014
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Posted on Jan 02, 2017
SOURCE: Where is the location of
You have 2 converters on that vehicle (front and rear). The 02 sensor in front of the FRONT converter is directly in front of the converter. The other sensor is behind the FIRST converter.
Posted on Aug 02, 2008
On mine, I got under there and there are rocks rattling in the heat shield. There are factory made holes in it, and the rocks sit in there like eggs in a carton and rattle when the engine hits a certain vibration frequency which is basically when it is at a stop light or idling. The repair shop wanted to charge to cut them off but I think I am going to drill bigger holes so the rocks fall out, as they are pretty tiny.
Posted on May 16, 2009
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