Oil in the catch can
06-18-2002, 04:30 PM
#1
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Location: Vancouver, WA
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Oil in the catch can
My 2.7L 914/6 is plumbed with the hose from the top of the crankcase going to the oil tank and the vent hose from the tank
going to a catch can in the rear trunk.
During normal street operation, it stays dry.
After this last 2 AXs, it has gathered about 8 oz of oil each time.
During the last AX, the car got 10 hard runs, with the rpms probably never dropping under 4500 or so and wound to 7k as often as possible
That's why I put the catch can there, I suppose ........dumb question time.
Is it "normal" for a 911 engine to pump that much oil out the breather? Even if it is "slosh" from the tank, it woud take a lot of air to move that much oil, me thinks. Any input here?
The amount in the catch can isn't noticeably missing on the dip stick......so what do I do with it? Adding a like amount to the tank
seems a bit silly.....but I'm open to ideas.
going to a catch can in the rear trunk.
During normal street operation, it stays dry.
After this last 2 AXs, it has gathered about 8 oz of oil each time.
During the last AX, the car got 10 hard runs, with the rpms probably never dropping under 4500 or so and wound to 7k as often as possible
That's why I put the catch can there, I suppose ........dumb question time.
Is it "normal" for a 911 engine to pump that much oil out the breather? Even if it is "slosh" from the tank, it woud take a lot of air to move that much oil, me thinks. Any input here?
The amount in the catch can isn't noticeably missing on the dip stick......so what do I do with it? Adding a like amount to the tank
seems a bit silly.....but I'm open to ideas.
06-19-2002, 02:28 PM
#2
The engine is creating some blowby at high rpm which is forcing oil mist out of the tank - usually quite normal. However, I don't have a reference point for how much oil vs time would be excessive. A beginning point would be a compression test to compare against specs, now and some later date.
Is there enough area for the engine to vent (hose ID, etc.)? Are you venting to atmosphere or back to the engine?
Sherwood Lee
<a href="http://members.rennlist.org/911pcars" target="_blank">http://members.rennlist.org/911pcars</a>
Is there enough area for the engine to vent (hose ID, etc.)? Are you venting to atmosphere or back to the engine?
Sherwood Lee
<a href="http://members.rennlist.org/911pcars" target="_blank">http://members.rennlist.org/911pcars</a>
