Exhaust Rattle...

Discussion in 'General Motoring' started by Joe Antol, Jun 17, 2004.

  1. Joe Antol

    Joe Antol Guest

    I own a 2000 Subaru Outback with 41k miles and I've had a rattle
    emanating from the front underside of the car when I accelerate;
    especially up hill.

    I've taken the car to a Subaru shop and the mechanic said a protective
    plate for the exhaust was loose. The plate was riveted in place and
    the rattle disappeared for several weeks. This cost me 30 minutes of
    labor or $40

    Recently, the problem has reoccurred. I spoke to the repair shop and
    they said that the best thing is to cut the plate off, free of
    additional charge. I'm no automotive engineer, but I'd imagine Subaru
    put the plate there for a reason.

    I realize these symptoms are vague, but has anyone else experienced a
    similar problem? Does this solution seem reasonable, or is my
    mechanic just lazy?

    Thank you,

    Joe Antol
    Joe Antol, Jun 17, 2004
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  2. Joe Antol

    Alan Guest

    This seems to be a common problem, and from what I've seen here on the
    newsgroup, there is no fix. People tell the exact same story. Fixed it,
    sound comes back, only solution is to cut it off- but doing so could start a
    fire, so don't do it.
    Alan, Jun 17, 2004
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  3. Joe Antol

    jimuntch Guest

    Before you consider having it removed, try shimming it yourself. I've used
    this procedure several times, with several subarus...crawl under your car
    (cold engine), use a rubber mallet to gently bang your heat shield to
    determine where the rattle is coming from. Next, you need to find something
    to work as a shim in between the heat shield and the exhaust system. I've
    used a variety of materials...nuts, bolts, screws, driveway rocks. Gently
    tap your shim in place, tap with your hammer to confirm the rattle is gone.
    Fire is a possibility, although fairly remote. The top heat shield protects
    your cabin (and you), the bottom heat shield keeps tall grass, leaves, etc.
    from catching on fire. I've been a firefighter for 17 years, and I can't
    say specifically how many fires have started due to heat shield
    removal...one time the interior of an old (Buick) caught fire, but the
    floorboard was rusted to the point that it looked like swiss cheese!
    jimuntch, Jun 17, 2004
  4. I had a chevy truck with this problem, I finally bought a heat sheild
    blanket and attached it to the body instead of the converter. The floor
    over that spot was actually cooler that way.
    Chris Phillipo, Jun 21, 2004
  5. Joe Antol

    Jason Guest

    I have the same problem with my 2000 Legacy GT. Just started rattling
    a couple months ago @ around 65,000 miles. I've found the source of
    the rattle, it's a shield in the area before the catalytic converter.
    One end of the shield is welded, but one end is free to vibrate. I
    tried duct tape, which worked for a while, but I suspect it melted..
    Shimming sounds like a good idea, just need to find the right
    Jason, Jun 21, 2004
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