Black soot in tail pipe
#1
AudiWorld Senior Member
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The other day I was wiping the tail pipe and noticed the inside is getting dark. My finger wipe tells a thin layer of black soot. I have just 5k miles after 4 months with moderate driving. RPM hasn't exceeded 4000 yet and oil level is still at full mark. And then, this morning, I walked pass a same car in our work place garage. I did a quick finger wipe to the tail pipe and there is a thick layer of black coke.
This A4 is my first turbocharged car. Are all turbos has the soot or vw/audi 2.0t particularly susceptible to soot. I did notice that lots of BMW 3s have unsightly blackened tail pipes. I thought only diesel cars have black tail pipes.
This A4 is my first turbocharged car. Are all turbos has the soot or vw/audi 2.0t particularly susceptible to soot. I did notice that lots of BMW 3s have unsightly blackened tail pipes. I thought only diesel cars have black tail pipes.
Last edited by minmet; 03-30-2017 at 05:16 AM.
#2
AudiWorld Super User
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Diesel cars smoke like no other. But yes. Looks like our petrols produce soot too. Mine has the same thing though not much since it has done only 2200 miles.
#3
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My old 2010 A4 2.0T crapped up the pipes so badly that after a while the chrome couldn't be cleaned anymore and I had to replace the tips, but my 2013 Q5 (with the same motor) has been much better. 2017 A4 so far has been clean as a whistle but only 3,000 mi. so probably too soon to tell.
#5
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Both my old Honda Pilot and Toyota Camry had no any hint of soot in the tail piper after 10 years and >100k miles. My current Lexus RX350 and Honda Pilot which is direct injected also have no any hint of soot after two years and >20k miles each. Guess I will need to change my mind set now.
Probably just an Backyard Shadetree mechanics' unnecessary worry.
Probably just an Backyard Shadetree mechanics' unnecessary worry.
#6
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Michael Karesh, the developer of TrueDelta.com said “The only engines it’s reported quite a bit is [with] the VW/Audi 2.0T and then the Audi V6s.” He also said, “I know there are some BMWs that end up with carbon buildup as well.”
I bought the car and plan to hold long. Looks I will have to be proactive dealing this issue.
#7
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#9
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The other day I was wiping the tail pipe and noticed the inside is getting dark. My finger wipe tells a thin layer of black soot. I have just 5k miles after 4 months with moderate driving. RPM hasn't exceeded 4000 yet and oil level is still at full mark. And then, this morning, I walked pass a same car in our work place garage. I did a quick finger wipe to the tail pipe and there is a thick layer of black coke.
This A4 is my first turbocharged car. Are all turbos has the soot or vw/audi 2.0t particularly susceptible to soot. I did notice that lots of BMW 3s have unsightly blackened tail pipes. I thought only diesel cars have black tail pipes.
This A4 is my first turbocharged car. Are all turbos has the soot or vw/audi 2.0t particularly susceptible to soot. I did notice that lots of BMW 3s have unsightly blackened tail pipes. I thought only diesel cars have black tail pipes.
Also pretty amazing is that my oil level hasn't gone down at all, whereas my '09 (before the oil-related recall) was using a quart every 1,200 miles.
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#10
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My A4 is 11 months old with only 6,000 miles on the clock. Just this past week I noticed a slight hint of carbon buildup on the tailpipes, which is amazing because by '09 A4 would blacken the pipes in one week. I was constantly using chrome cleaner to try to remove the carbon, but it became a losing battle.
Also pretty amazing is that my oil level hasn't gone down at all, whereas my '09 (before the oil-related recall) was using a quart every 1,200 miles.
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Also pretty amazing is that my oil level hasn't gone down at all, whereas my '09 (before the oil-related recall) was using a quart every 1,200 miles.
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