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Old 22nd March 2009, 16:09   #1
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Exclamation Exhaust pipe gets coated brown after a run. What's wrong ?

I'd put on a new exhaust tip the other day when SYJ had got disgusted with the rusted piece of cylindrical-iron that I had had for an exhaust pipe. Yesterday when i got back home, I noticed that the new tip had got a coating of fine brown powder along it's inner side. I rubbed it of with my finger and it came of clean. I'm pretty sure this ain't normal. Could anyone help me out with this ?
  • I use premium petrol in my car always.
  • The engine check-light is on always-on mode. The mech told me that it's come to 15grand or so to set it right.. didn't want to waste that much.
Thanks in Advance !
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Old 22nd March 2009, 18:01   #2
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If I may risk making a comment with my limited knowledge, that colour indicates a very well tuned & frugal engine. I think you should be happy, not worried.





Cheers
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Old 22nd March 2009, 18:12   #3
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Originally Posted by di1in View Post
The engine check-light is on always-on mode. The mech told me that it's come to 15grand or so to set it right.. didn't want to waste that much.
Did he tell you what exactly is the problem? I am expecting it to be a busted O2 sensor. If it is, I am sure there are cheaper alternatives mentioned by other OHC users right here on the forum. Honestly, its better you get a scan done for the reason the CEL is On.
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Old 22nd March 2009, 20:26   #4
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Originally Posted by mclaren1885 View Post
Did he tell you what exactly is the problem? I am expecting it to be a busted O2 sensor. If it is, I am sure there are cheaper alternatives mentioned by other OHC users right here on the forum. Honestly, its better you get a scan done for the reason the CEL is On.


And I thought I was giving out pearls of wisdom !! (maybe I am)




Cheers
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Old 23rd March 2009, 00:05   #5
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Default Thats is a good sign!

Quote:
Originally Posted by Ricky_63 View Post
If I may risk making a comment with my limited knowledge, that colour indicates a very well tuned & frugal engine. I think you should be happy, not worried.





Cheers
+1 to the above. A powdery brown residue is a good sign if there is a little of it.
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Old 23rd March 2009, 00:34   #6
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The brown tip is good only if its on the spark plugs end. Not at the end of the exhaust tip.

Brown coloured spark plug tip indicates complete combustion.

The brown seems like its powdered rust gushing out of your muffler. Or maybe it has something to do with your cat-con. Can't be sure.

Get the check engine light bit corrected ASAP. It could make things worse. As mclaren said could just be a busted O2 sensor.
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Old 23rd March 2009, 11:44   #7
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Looking at the tip I would not be able to comment on the state of the engine but it looks like the mesh is rusting slowly due to the moisture coming out of the exhaust. (Am assuming that you are running the stock exhaust system)
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Old 23rd March 2009, 13:57   #8
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i think it is rust from the tail pipe , which you mentioned was already rusted.
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Old 23rd March 2009, 16:03   #9
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Quote:
Originally Posted by Ricky_63 View Post
If I may risk making a comment with my limited knowledge, that colour indicates a very well tuned & frugal engine. I think you should be happy, not worried.





Cheers
I also vote for this. This seems to be a good signal for a petrol car. Even water coming out of the exhaust is not considered bad. I wish my beast also was like this at exhaust than the current Black .

Anyway to clear the doubts, you must get it scanned at the Honda Authorised Service Centre...

Cheers

Rajeev
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Old 23rd March 2009, 16:21   #10
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i think it is rust from the tail pipe , which you mentioned was already rusted.
Yea, maybe that's it.. loads of thanks for the pictorial explanation buddy !
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Old 23rd March 2009, 16:26   #11
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Originally Posted by rajismine View Post
I also vote for this. This seems to be a good signal for a petrol car. Even water coming out of the exhaust is not considered bad. I wish my beast also was like this at exhaust than the current Black .

Anyway to clear the doubts, you must get it scanned at the Honda Authorised Service Centre...

Cheers

Rajeev
Getting it scanned at Honda is out of the question, the prices they charge over there is the equalant of theft ! I'd rather keep my mind content with the water vapour theory..
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