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#1 2018-02-02 18:37:57

woodrow
Member
Registered: 2018-01-28
Posts: 4

dispatch smoking..!

I am led to believe my van is smoking because the crank case vapours are not filtering and thus going back into the combustion chamber for burning!!

Any ideaS?

Thinking of putting in my own oil catcher to solve!!?

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#2 2018-02-14 15:41:58

vaz2121
Member
From: SW. Scotland
Registered: 2015-08-31
Posts: 323

Re: dispatch smoking..!

I'm not convinced that would cure .. but hey disconnect give it a whirl...

I'm not so sure how much blow by would be needed but it would need to be breathing very heavily, to the point a catch can would likely fill quickly (How quick is oil dropping on dipstick?).......... Disconnect breather and if road testing necessary to replicate ........  temporary stick breather in a can or so see if it continues...or what happens 

Colour of smoke from exhaust is often a good indicator and when.....Hot/cold engine.... White ish, grey, dark grey, blue, black and on acceleration... overrun..... tick over..... all the time....
There's many factors and even with the normal rule of thumb here more  info is needed .... but even though an on line a prognosis is not always a foregone conclusion.
Sorry...................

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#3 2018-02-15 23:21:31

unter
Member
Registered: 2016-03-06
Posts: 15

Re: dispatch smoking..!

and what makes you think crankcase fumes are getting reburnt?
more likely piston blowby, i.e your pistons are blowing oil everwhere, all over the place.


Cancerian Aspergian indigolian manly child

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#4 Today 12:28:56

woodrow
Member
Registered: 2018-01-28
Posts: 4

Re: dispatch smoking..!

I came to this from my mechanic.. After the intercooler was leaking and spitting oil out he seemed to think that the filter in the top of the engine that demists the crank case vapours was not effective.. It only seems to smoke on hard acceleration.
I dont have to top up the oil as it does not really use that much.. it lasts a year or 10k. it does go down a little maybe a mug full is used in this time? what he said seems to make sense.. but a new filter from citroen is over £500 with gasket. it has always smoked in the 18month i have had it. oil in inter cooler means oil at the turbo could mean its coming through the breather or a leak at the turbo?
I have just fitted a catch can between the engine top and air inlet after the air filter. just taped into the line. it was brittle after 10 years of heat and broke in half in my hand befor i even had chance to chop it. i have oil/carbons down the back of the engine between the fire wall/bulkhead..? i am guesing it is also breather issues leaking? the lines were oiled and carbonated. I have flushed the engine and done 2 oil changes to get back to clean oil so i will let u know what the outcome is!

please share your views.

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#5 Today 13:27:45

Tiree
Administrator
From: Castle Douglas
Registered: 2013-09-20
Posts: 157

Re: dispatch smoking..!

Hi woodrow - I'm not particularly mechanically minded - but my turbo started to go at around 145k. One of the earliest symptoms was a bit of dark smoke when you put the foot down which got steadily worse over a year or so. Recon replacement turbo was under £500 fitted.


2006 Citroen Dispatch 2.0HDi bought in July 2013 - Partial camper conversion ........

mini_citroen-dispatch2.jpeg

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#6 Today 22:59:43

vaz2121
Member
From: SW. Scotland
Registered: 2015-08-31
Posts: 323

Re: dispatch smoking..!

Woodrow:A little Oil in the turbo air pipes is a traight of Turbo diesels......
Simple fact is because of the high compression all diesels even healthy engines suffer some blow by more than petrol engines.... Hence why oil gets So black and dirty and usually much shorter oil change schedules than Petrol engines
Turbos can fail in several manners....... Failing seals allowing oil into either the exhaust side (Blue smoke) or into inlet side (oil in pipes etc.)
Black smoke is unburnt diesel
Usually with mileage......injectors: Needing new nozzles or cleaned can cause black smoke as fuels not atomised properly............
If the engine is heavily worn and you have excessive blow by you will get lots of oil in inlet pipes even if the filter is operating properly
With your catch can put some wire wool loosely in it to give the vapours something to condence onto and help the vapours to return to oil rather than just an empty void
....... with out actually seeing what it's doing
I'm not for one second contradicting your mechanic but your last post is suggesting to me that you engine maybe not that bad if the only real smoke is some black under hard acceleration
As for the brittle pipes they do need attending to and if a breather is blocked crank case pressure needs to escape somewhere (oil leaks etc)

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