I have an 85 190E that is shooting oil out the hose from the top of
the engine into the air filter. The car runs ok otherwise but it does
seem to have lost a little power. Its not worth fixing the engine to
stop this but I'm wondering if I can just remove the hose an plug up
the hole or will this cause additional engine or driveablility
The hose is the valve cover vent and is designed to allow excess pressure in
the valve cover area to be vented into the air cleaner. There is a baffle
designed in the valve cover "roof" that is there to minimize the amount of
oil that gets sent through the tubes to the air filter (where it's safe in
small amounts). If you're getting a lot of oil into the air cleaner, it
could be a symptom of "blow-by" in the head, or that there's a valve seal
that's allowing the airspace around the camshaft to be "compressed."
So, don't ignore the symptoms, it would be like putting a piece of black
tape over a warning light, fix the problem.
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