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I 'solved' my last thread and can't unsolve it to ask this question.
I took off the EGR valve today and it was quite sooty but not bad at all. My uncle (who is no expert) thinks it being a little sooty that it's running a bit rich and not burning all the fuel. The inlet manifold behind the EGR was absolutley bogging with sticky/sooty gunk. Is this normal or am I running rich?
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Jamie
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With a conventional diesel there is no such thing as too rich in a " carburettor " sense, all you can have is insufficient air delivered to to the engine caused by a restrictive air filter, the fuel pump delivery is fixed.
What you describe is in essence normal though not desirable.
This is why I re route my engine breather to atmosphere / separate catch pot rather than feeding it directly back into the inlet manifold - if you are not feeding an oily / watery slime into the manifold then it will stay cleaner.
A similar notion applies to EGR blanking but that is another story.
2007 M59 1.6 HDi
Serieal Berlingo owner
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• mugatea
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I'm plannin to blank of EGR. Is there any way to clean inlet manifold?
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Usually the gunk is so well-bonded that you need a commercial cleaning setup to remove it - maybe ask the local head reconditioners if they could run it through their solvent cleaning process. The poor man's fix is a plastic storage crate full of diesel and you stick it in there for a few days before shaking clean.
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• mugatea, ron
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(05-05-2013, 07:26 AM)mugatea Wrote: I'm plannin to blank of EGR. Is there any way to clean inlet manifold?
The last one I did I used a lot of aerosol carb cleaner on it and scrape with something to get the thickest off.
So where does this bit go then ?
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If you look at one of my other posts you'll find that I swapped those pipes over by mistake. The car will idle but as soon as you rev it you'll get clouds of grey smoke out of the exhaust (and I really do mean big clouds). The butterfly valve will close prematurely too. You'll notice it believe me!
Malc
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On the 2.0HDi the MPG figures are better on mine when the EGR is removed/blanked
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• mugatea