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Billowing smoke from new exhaust pipe

Tiny
KARENT63
  • MEMBER
  • 1999 SAAB 9-5
  • 4 CYL
  • 2WD
  • MANUAL
  • 190 MILES
Have you ever heard of a butterfly valve in reference to the exhaust pipe being installed on a 1999 Saab 9-5 Turbo? I had pipe replaced and ever since, there is bellowing smoke coming from the exhaust pipe. Someone told me there was a "butterfly valve" located where the pipe connects and if not careful, the clip/valve could get flipped up and that would cause all the smoke. I haven't driven it for quite a while and can't afford to have it towed back to the muffler shop 25 miles away, plus it's been about 8 months since it's been driven. Was also told it could be the turbo gone bad. If it's the turbo, I will sell for what I can. Any help is very much appreciated!

Karen
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Wednesday, July 6th, 2011 AT 10:37 PM

6 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
What colour is this smoke?
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Wednesday, July 6th, 2011 AT 10:48 PM
Tiny
KARENT63
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  • 4 POSTS
White. And it wasn't smoking at all before I had the exhaust replaced. Ever since, it's like a naval defense smoke screen.
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Wednesday, July 6th, 2011 AT 11:06 PM
Tiny
MHPAUTOS
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White smoke is a sign of coolant in the combustion chamber, I would get a head check done for any signs of a gasket leak, are you using any coolant?
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Thursday, July 7th, 2011 AT 2:32 AM
Tiny
KARENT63
  • MEMBER
  • 4 POSTS
Not recently. The car hasn't been driven for about 6 months or so. I have a number for a mobile car doctor that I may end up calling. Just wondering if this is a sign of future problems with the car and maybe I should try to sell it. It just sounds like it could get really expensive before it's over.
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Thursday, July 7th, 2011 AT 9:33 AM
Tiny
MHPAUTOS
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A head check is a quick and simple chemical test to check for Co in the cooling system, this will indicate a cooling leak into the combustion chamber, if this is negative you may have a leak into the inlet manifold which would not be a drastic, also check the brake fluid as I have seen faulty master cylinders leaking into boosters and drawing fluid past the one way valve into the engine, brake fluid burning would send a huge white smoke screen and it stinks as well.
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Thursday, July 7th, 2011 AT 9:39 AM
Tiny
MNTHNY4
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  • 612 POSTS
White smoke is also a sign that u may have a bad turbo seal causing oil to get into the exhaust side of turbo. Note also to check oil level if too much oil like 2-3 qrt's more than needed it will also re-act the same way lots of white smoke, good luck.
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Wednesday, July 20th, 2011 AT 12:34 PM

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