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Smoke out of oil filler cap and dipstick

AzzKicker

1/2 ton status
Joined
Jul 28, 2002
Posts
265
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Location
Edinburg, Tx
If I remove Oil Filler cap I can see some faint smoke coming out. If I remove the dipstick I see same thing.

Is this normal. Truck has 200K.
 
I believe this to be fairly normal. Diesels don't have any engine vacuum so it is harder to pull these vapors back into the intake. I think some of the diesel have a tube/filter that plumbs back into the air cleaner. Mine also smoke some from both the dip stick tube and filler cap.
 
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