Blue smoke
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Freshman User
Joined: Feb 2013
Posts: 35
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Blue smoke
My 93 7.3 idi only has 45K original miles (not a misprint), but emits too much blue smoke. It burns less than a qt of oil per thousand miles. I did a search on this forum, and valve seals were suggested as a likely problem. I haven't done a compression or leak-down test.
My car mechanic said there is a fuel additive designed to counteract a diesel's blue smoke, but that sounds too easy.
Any thoughts?
My car mechanic said there is a fuel additive designed to counteract a diesel's blue smoke, but that sounds too easy.
Any thoughts?
Senior User
Joined: Jun 2016
Posts: 354
Likes: 1
From: Ar
Blue smoke mostly caused by Worn valve guides, or seals
Cylinder &/or piston ring wear
Cylinder glaze
Piston ring sticking
Incorrect grade of oil.. Too thin and getting past rings, or valve guides
Fuel dilution of the oil, making it too thin.
Cylinder &/or piston ring wear
Cylinder glaze
Piston ring sticking
Incorrect grade of oil.. Too thin and getting past rings, or valve guides
Fuel dilution of the oil, making it too thin.
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