Black exhaust now

M

maryem

Member
Yet another question please folks. Husband noticed when looking at the car that one of the exhausts was black and running rich. He asked the garage to fix that before he picked it up. Salesman now saying it was "a valve in the exhaust".... husband wondering what the hell that means!
Any ideas? He's worried now and might cancel the deal. :|
 
They have a flap in one of the exhaust’s pipes that opens at certain throttle positions, so normally only one pipe is open and the other when needed.
 
So would it be normal for one pipe to be black and sooty and the other one beside it be clean? Sorry husband not here at present so yur talking to a batty female here :lol:
 
maryem said:
So would it be normal for one pipe to be black and sooty and the other one beside it be clean? Sorry husband not here at present so yur talkin to a batty female here :lol:
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Yes, that’s quite normal & doesn’t mean it’s running to rich.
Rob
 
Thank god, magic! Thought husband was going to have a heart attack earlier! :D Thank you so much, fabulous forum :driving: :driving:
 
maryem said:
So would it be normal for one pipe to be black and sooty and the other one beside it be clean? Sorry husband not here at present so yur talking to a batty female here :lol:
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Don't put yourself down!
Sometimes much easier to talk to someone who knows they know nothing than someone who thinks they do. :D
 
The idea of the flap in one pipe, to put it very simply, is that when you start the car up at home early in the morning, or when you are driving through town, the exhaust gas goes through the silencer but when it gets to the flap it is closed, so it has to turn round, go back through the silencer again (thus making it quieter) and find its way out of the open pipe.
When you're out on the open road and having fun, the flap opens and that noisy old exhaust gas leaps out unhindered and upsets the local wildlife.
OK, the technical side is maybe a little glossed over, but that about sums it up. :D
 
Black exhaust, these cars run hot so must have initial large clearance on pistons to cylinders.
My car uses about 1 litre of oil over 10k miles. Exhaust is black (so is the pretend one on the right to match :P ).
Have owned cars that burn virtually no oil.
My diesel Berlingo burns no oil and exhaust is surprisingly clean-ish.
 
My M Coupe uses hardly any oil, but the exhaust tips still get black within a few hundred miles of being cleaned. :(

But it has driven just fine for the 3+ years I've had it, so I don't think it is symptomatic of any problem.
 
enuff_zed said:
When you're out on the open road and having fun, the flap opens and that noisy old exhaust gas leaps out unhindered and upsets the local wildlife.
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If only that were the case. I asked the question here about three years ago: does anyone know when the exhaust valve opens?

Got so many different responses that I realised that no one actually knows! "It opens when the roof is down." "It opens when the roof is closed.", etc, etc.

I'm surprised there isn't an official answer to this question!
 
SV8Predator said:
enuff_zed said:
When you're out on the open road and having fun, the flap opens and that noisy old exhaust gas leaps out unhindered and upsets the local wildlife.
Click to expand...

If only that were the case. I asked the question here about three years ago: does anyone know when the exhaust valve opens?

Got so many different responses that I realised that no one actually knows! "It opens when the roof is down." "It opens when the roof is closed.", etc, etc.

I'm surprised there isn't an official answer to this question!
Click to expand...
Don’t actually give a stuff tbh as mine has been permanently open since the day I got the car. Not the golf tee mod so either broken or some kind of coding shenanigans. Who cares? Sounds great 😁
 
It would have been so much easier for the OP and her husband if they had bought mine!

None of the 'issues' they are worried about are present on mine! Hey-ho! :)
 
Wouldn't have been possible Pondrew - we had to trade in our car as didn't have enough cash, plus you're too far away for us to get to easily anyway - husband is 76 and it would've been too far for him to drive just to look at a car. I hope you get a buyer soon xx
 
maryem said:
Wouldn't have been possible Pondrew - we had to trade in our car as didn't have enough cash, plus you're too far away for us to get to easily anyway - husband is 76 and it would've been too far for him to drive just to look at a car. I hope you get a buyer soon xx
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Fair enough! I hope you enjoy your new car. The forum will require pictures when it arrives! :thumbsup:
 
SV8Predator said:
If only that were the case. I asked the question here about three years ago: does anyone know when the exhaust valve opens?

Got so many different responses that I realised that no one actually knows! "It opens when the roof is down." "It opens when the roof is closed.", etc, etc.

I'm surprised there isn't an official answer to this question!
Click to expand...

Here he is! Mr Happy! :roll:

I am waiting to see if you will ever post a reply that isn't either condescending, negative, or downright derogatory in some way.
I am not holding my breath TBH! :)
 
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