The crankcase breather, ACDelco #CV870, on my '83 Surburban/6.2L diesel,
is starting to spit up small quanties of engine oil irregularly, and my
mechanic says its time for a new one. Before I accept this, I want to
educate myself a little:
1. What is a crankcase breather and what does it do?
2. Is it adjustable? I see no obvious means of adjustment or opening.
3. This online parts catalog seems to suggest that aside from the breather
there are also breather elements that can be replaced separately:
Yet again I see no obvious way to open the breather.
I've googled for answers, but what I come up with are parts dealers, not
information about the part.
Thanks as always, guys,
I'm not real familiar with diesels, so if someone more knowledgable can
dispute this, then take their advice over mine.
However, on my engine (as well as every engine I've ever owned) the
breather was a fairly cheap device. I used an aftermarket one from Pep
Boys on my Blazer recently when I was replacing so much stuff under the
hood. Mine was like $10. It was chrome, so I used hi-temp black spray
paint for BBQ grills to "de-bling" it.
Concerning the blow-back through the thing... Breathers as supposed to
relieve crankcase pressure. If you're getting enough pressure to blow
oil through the thing it would seem to me that too much pressure is in
there in the first place. That's usually indicitive of a bad ring
Either that, or the thing has soaked up so much oil after years of use
that it truly is clogged and now that stuff is seeping out.
But to answer your question, no, it's not adjustable. At least not
that I've ever seen.
Regardless, it's a cheap part. Replace it.
Just my $.02...deferring as always to someone more knowledgable.
Warren Post wrote:
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