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#1
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catalytic or heat shield?
I have a rattle under my car, can't find an obvious/loose heatshield. I understand the cat can rattle - I have 79920 miles (so emission warranty is about to go). How do I check the cat (hit it with a wood block and listen for rattle)?
Hate to have a bad cat and barely miss the warranty. Dealer cannot get me in before Monday, and I will be past 80kmi by then . . .
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired) |
#2
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tow it in if you have to, get a rental car, whatever...it is almost definately the cats as it is very common for them to rattle and they are not what one would refer to as an inexpensive part.
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#3
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Thanks!
I brought it in to the dealer this afternoon, they ruled out the cats/they think. But they wanted me to bring it in so they can document it before 80kmi. Seemed the prudent thing to do.
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired) |
#4
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if you can here the rattle while the vehicle is in gear but standing still (foot on the brake) and it increases in intensity with engine speed/load, it is the cats. sometimes they will act up with the old hammer test, but not always.
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#5
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I hear a rattle at idle, in gear.
Hardly any rattle in N or P. As soon as I accelerate, it goes away. Don't know what else to do, since I documented it.
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2008 S550 2010 GLK350 1997 E420 (retired) 2005 CLK500 (retired) |
#6
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The reason for documenting a problem like this is, so it will be repaired at a later date, but still under warranty.
If the noise can be duplicated when in D at idle, why does somebody not get under the car & track down the sound ?
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2007 C 230 Sport. |
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