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The answer depends somewhat on the year and model of the bike, but overfilling the oil tank is the most common cause.
Other contributing factors include brittle umbrella valves (only certain years), worn or damaged check ball in the oil pump (only certain models), cam type and worn oil pump scavenger gears.
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∙ 13y ago
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Where is vent tube on 400 turbo transmission?
There should be a vent tube just above the in and out oil fittings on trans. It may be hard to see if trans is installed in vehicle.
Your inotec lawn engine started blowing oil out the vent on the oil fill tube whats your problem?
Too much oil in it, have you hit somthing lately with mower ? timing could be off, rings leaking thru, [blow back] age of engine !
Why would gear oil be coming out vent tube of a 2000 jeep wrangler?
Fluid over full, moisture in the fluid, axle overheating, vent tube installed too low,
Can you route breather tube into oil tank with a vent on top to atmosphere?
Not enough info.
Where to put motor oil on 1956 ford tractor 600 series?
there is a breather tube with a large vent cap on top, pull the vent cap off and the tube is exposed, put oil in the tube. It is located on the right side ( sitting in seat ) of engine just forward of distributer ! Terry !
If a 97 cat 3116 had excessive blow-by through crank case vent tube and was hard to start when set overnight but you plugged block heater in heavy smoking stopped while idling and engine started right?
Did you overfill the oil?
What will make a car blow oil out the dipstick tube?
It could be a clogged PVC valve.
Do you check the oil level on a 1996 road king on the kick stand or with the bike upright?
always with the bike upright checking on the stand causes it to be over full This then causes the engine breather vent tube inside the oil bag to be under oil then it will blow oil out of gaskets and all vents even push oil cap off tank while riding
1985 oil is coming out vent hose in the carburetor replased oil filter checked all hose?
If I understand correctly, you're getting oil in the air filter that's building up around the "vent" hole??? That's PROBABLY the crankcase breather pipe and it's an indication that the engine has a LOT of "blow-by". Blow-by is a condition that is typically caused when an engine is not adequately maintained and exhaust gasses leak past the piston into the crankcase. The exhaust gas MUST go somewhere, so engineers provided a breather tube that keeps the oil vapor from getting in the air. But... when an engine has a LOT of "blow-by", the oil will build up on the inside of the air cleaner and make a mess.
What is the hose called that is on the front drive axle of a 2003 silverado 1500?
That is a vent tube, It let's the pressure out of the differential so it don't blow the grease seals out.
What can cause oil coming out of the crankcase vent tube on a 2006 dodge cummins diesel 3500?
Engine over full, diesel in the oil, excessive blowby.
Why would engine oil be in around air filter on rebuilt engine?
breather tube from crankcase or valve cover brings blow-by to the air cleaner to reburn. excessive blow by will be heavy with oil in the air.
