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velleman
29-03-2017, 07:43 PM
Question, White smoke is mostly coolant in the system! Black smoke is problem with diesel (injectors etc.) and Bleu smoke would be a problem with engine Oil
is this the correct way? or can Black and Bleu also being a problem with Oil
regards
Erwin

dan2485
29-03-2017, 08:25 PM
Black smoke can be due to a blocked air filter/intake also.

velleman
29-03-2017, 08:36 PM
Other problem is! that I have no malfunction on the injectors, Oil level stays always the same! at cold start no smoke! after the engine is warm stand still in 800rpm the exhaust begins to show bleu smoke and smells very bad!
when I start to drive after a few minutes, the exhaust begins the blow out very heavy bleu smoke like the car is on fire! and after a mile it is gone?? when I stop at the traffic lights only 20 seconds later I drive again, a small bleu cloud will come out an done again. when I get in to traffic File! the exhaust starts to give small bleu smoke as long as it takes! when traffic is open again and I start to drive harder, their will be a tremendus bleu smoke coming out of the tailpipe! I put in a brand new turbo! problem stays? when I take out the Oil-fill cap!their is no blow and also no suction? only at 1500/2000rpm their will be a small suction? the crankcase valve could be broken? I can blow air in to the engine it will come out at the Oilfill hole! and when I blow in to the Oilfill hole air is coming out the crankcase valve tube? is this correct! their is also no suction at the tube from the turbo front going to the crankcase valve?
It's a Audi 2.7 Tdi Quattro Avant 132kw 2006 with 300.000km and has perfect acceleration.

zollaf
29-03-2017, 08:44 PM
this is classic injector failure, too much fuel going in that doesnt burn. i presume the smoke smells strongly of diesel.

B5NUT
29-03-2017, 09:50 PM
As above injector failure, and you won't get any fault codes with this failure. Had the same fault on my 2006 3.0 TDI Avant, changed the injectors and that fixed the issue.

lynalldiscovery
30-03-2017, 06:46 AM
Wifes old A4 3.0 tdi did the same, she hadnt even noticed it until I saw a cloud come past the window!
Audis like their injectors.

zollaf
30-03-2017, 09:42 AM
many cars with common rail do this. i look after some merc sprinter minibuses and 2 needed doing last year. they were fine when running, but leave them ticking over for 10 mins then drive off and it was amazing the amount of eye watering smoke they produced.

swalker
30-03-2017, 12:59 PM
the wifes BM does this but it is blue and does smell of oil..

the engine needs to breath, some engines have closed systems (the ur should stall if you remove the oil filler cap) others are open.
think about what happens on top of the piston the first 2 cycles, suck and push this also happens below the pistons, the air needs to move freely.

just on the oil burning bit, in the morning and away from traffic lights, its worn valve guides,

coming off the motor way / slowing down after sustained speed, its rings.

Crasher
30-03-2017, 01:55 PM
Grey smoke can be excess unburt fuel and the colours change according to petrol or diesel plus grey smoke can be brake fluid.

zollaf
30-03-2017, 02:03 PM
not had a car yet that burns brake fluid..:booty:

grant19841
30-03-2017, 02:08 PM
not had a car yet that burns brake fluid..:booty:

I was kinda wondering the same [emoji9]

Never known it enter a combustion chamber either


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lynalldiscovery
30-03-2017, 05:54 PM
Petrol engines take its vac off of the manifold and if master cyl seal/servo has failed its a possibility, got to be rare as can be.

On my land rover there was a recall as the servo could fill up with engine oil and you lost your brakes.

There is also the old trick os spraying brake fluid into the inlet whilst its running to clean the engine out, bit like seafoam etc

Crasher
30-03-2017, 06:56 PM
not had a car yet that burns brake fluid..:booty:



I was kinda wondering the same [emoji9] Never known it enter a combustion chamber either

That is because you drive cars powered by the Devils own urine which get their servo vacuum from a vac pump, those of us that drive petrol engined cars have an engine vacuum powered servo so if the master cylinder leaks brake fluid out of the push-rod end, this gets drawn into the engine and is burnt, making grey smoke and a nasty smell.

zollaf
30-03-2017, 07:10 PM
oooooooooooh, :)

grant19841
30-03-2017, 07:17 PM
Ok master I understand [emoji9]


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zollaf
30-03-2017, 07:19 PM
you would be getting through a lot of brake fluid..
and to point out, my old 80 coupe was a petrol but had no servo or vac pump, yet a landrover 2.25 diesel has a servo and uses manifold vacuum to work it, so work that one out..

grant19841
30-03-2017, 07:37 PM
you would be getting through a lot of brake fluid..
and to point out, my old 80 coupe was a petrol but had no servo or vac pump, yet a landrover 2.25 diesel has a servo and uses manifold vacuum to work it, so work that one out..

Must be an American thing mate [emoji40]


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velleman
30-03-2017, 07:48 PM
Wifes old A4 3.0 tdi did the same, she hadnt even noticed it until I saw a cloud come past the window!
Audis like their injectors.
:biggthump

velleman
30-03-2017, 07:50 PM
Thanks! going to let them tested again :D

velleman
30-03-2017, 07:53 PM
this is classic injector failure, too much fuel going in that doesnt burn. i presume the smoke smells strongly of diesel.
I'm going to let them tested again! :D

lynalldiscovery
31-03-2017, 03:17 PM
you would be getting through a lot of brake fluid..
and to point out, my old 80 coupe was a petrol but had no servo or vac pump, yet a landrover 2.25 diesel has a servo and uses manifold vacuum to work it, so work that one out..


On the 2.25 there will be a flap valve in the intake and when you arent asking for power (very rare in a 2.25!) the flap closes and this draws the vacuum.
I assume this is a series 3 in which case I am ashamed for you, maybe trade it for a freelander, oh hang on:approve:

Have you a pic of the Audi 80 m/cyl? interested in the fact it has no servo.

swalker
31-03-2017, 03:20 PM
there is a bomb fitted to turbos, which run on boost petrol and diesel

http://i.ebayimg.com/00/s/MTIwMFgxNjAw/z/WEIAAOSwjMJXCTiw/$_1.JPG

zollaf
31-03-2017, 03:26 PM
On the 2.25 there will be a flap valve in the intake and when you arent asking for power (very rare in a 2.25!) the flap closes and this draws the vacuum.
I assume this is a series 3 in which case I am ashamed for you, maybe trade it for a freelander, oh hang on:approve:

Have you a pic of the Audi 80 m/cyl? interested in the fact it has no servo.

the 80 coupe uses a hydraulic bomb as above to pressurise the master cylinder. strange set up but very good. and yes the landrover is as you describe, a butterfly but with a hole that closes on idle and snaps fully open as soon as you touch the go slightly faster pedal. again good as it doesnt waste energy driving a separate vac pump. only 55 bhp to start with, none to lose.

Crasher
31-03-2017, 03:46 PM
to pressurise the master cylinder. strange set up but very good

As long as the PS pump doesn't eat its vanes and chuck them trough the system as on a type 89 20v Coupe 7A we did the head on a while back, we flushed and flushed it but still two or three pumps on the pedal and BEEP! We have a type 85 C here and it has a 2337cc engine...