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Bayou 250 crankcase vent can not find it

Oil is leaking when running oil cap off oil is blowing in out

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: 1969 triumph trident bobber has to much oil

yes! sounds like exsesive crankcase pressure. time for a top end rebuild.

Posted on Apr 24, 2009

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ipodslinger
  • 688 Answers

SOURCE: Fuel leaking into crankcase on 2001 Honda CBR 600

it's probably leaking from the carb and down the cylinder into the crankcase.
it is probably due to a stuck float in the carb. take the float bowl off and make sure it is clean. the float can also be full of gas not letting it float up and stop the gas flow. the carb will fill up and leak wherever it can which is likely the case

Posted on Jul 21, 2009

  • 6 Answers

SOURCE: 1995 KTM 250-EXC Buring Oil

you possibly have a bad seal on your crank. Its called a labyrinth seal and it will be on your clutch side because it is drawing in crankcase oil. the other side would make it run lean by drawing in air by the stator. if it is eating crankcase oil and not leaking it, it is most likely your problem. you can do a leakdown test on it to confirm the problem. put the piston at bottom dead center and compress the cylinder to about 10 pounds of air using a leakdown tester or a compression tester hose that can be used to hook up to an air compressor somehow and hold the pressure, but do not go above that because you could damage those seals with too much pressure. Check to see if the cylinder will hold the pressure for a good amount of time on its own. Check for air coming out of the crank vent hose or the oil fill hole. Also dont overlook the simple things like your premix ratio. try 42:1 or 50:1 ratios of gas to premix oil.

Posted on Jul 29, 2009

czaa
  • 4536 Answers

SOURCE: model t 100 bonneville 2001 year

do you have to much oil in crankcase-better chec it mate-seems like the hi pressure is seeping past the piston u could also hav bad rings-hows the compression-test it please the bloodie bearings mite be bad-any noises try to secure a haynes manual cheers

Posted on Aug 08, 2009

baxtom
  • 74 Answers

SOURCE: Bandit 1200 oil in crankcase

No i would not expect it to, if anything blocking the vent hose to the gas tank would cause a vacuum and stoping fuel from flowing as easy , most likely a faulty fuel pump diaphram or incorrect float height.

Posted on Feb 23, 2012

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1 Answer

How can I stop oil from coming from my dipstick?


Depends on the cause.
Blow-by is when oil blows by the rings in the cylinders into the combustion chambers or compression blows by the rings into the crankcase. It can also be caused when too much pressure builds up in the crankcase because of a venting problem.
So blow-by can cause smoke out the tailpipe from oil burning with gasoline, or oil collecting in the air cleaner, or blowing out a seal or other place like your dipstick tube.
If it is caused by worn piston rings, the rings have to be replaced.
If it is a venting problem, you need to open up the vent, like the PCV valve or the air intake port.
If you remove the cap where you add oil and there is a vacuum when the engine is running, the venting system is working. If oil blows out the hole, there is too much pressure in the crankcase.

Nov 29, 2015 | Cars & Trucks

1 Answer

Why does the oil cap blow off


On a who-knows-what-kind of bike? Probably the crankcase vent is plugged somehow.

Sep 09, 2014 | Motorcycles

1 Answer

Crankcase pressure, what can i do about finding out why my 20hp kawasaki engine keeps blowing off oil filler caps


You have a vent plugged. One is cap vent plugged. I think your cap is ok. I will find a picture. I will be back.

Sep 01, 2014 | Garden

4 Answers

Why do i have oil gushing out of my crankcase vent hose?


Sounds like your piston rings are allowing too much blow-by. This can cause excessive amounts of oil to be forced through the vent hose.

They are either worn or if they have been changed the splits in the rings may be lined up rather than staggered 180 deg.

With that amount of oil I would bet they are worn.

Jul 05, 2014 | 2004 Yamaha Virago 250

1 Answer

Oil coming out of crankcase vent tube


I'd quicker think piston ring blow by the piston thus compression leaking / blowing into the engines base.

Mar 01, 2014 | Motorcycles

2 Answers

My 2.0L cortina is blowing oil out the filler cap and lots of blue smoke out exhaust and also leaking oil from back of motor and running down top of bellhousing


Generally speaking, you are describing an engine that has a crankcase that can not breath.
Pressure in the crankcase is supposed to be vented into the intake by way of the PCV valve. The crankcase pulls fresh air from the air cleaner.
Cortina is not a brand sold in the US, so I don't have direct info on it.

Jan 16, 2013 | Mitsubishi Galant Cars & Trucks

1 Answer

93 Fatboy oil leaking from vent tube at air filter. oil level is good, not over filled, oil will cover the oil tank on a 100 mile trip


On your '93 model, the crankcase vent is down low on the engine behind the oil pump and it runs up to the air filter through a metal and rubber hose. I don't know how many miles you have on your engine but it you're getting any blow-by on the rings, this will increase the pressure in the crankcase. Most people simply re-route the crankcase breather underneath the bike and plug the hole on the backside of the air filter. Replace the metal line with a rubber hose and put a small filter in the end of the hose. Route the hose back behind the transmission and attach it to the transmission mounting plate just in front of the rear wheel.

This was the way the older Shovelheads were done from the factory for years until the EPA made them start running the crankcase vented air through the engine. In 1994, Harley went to the "head breather" system and moved the crankcase vents to the heads. Still, the oil mist in the vented air builds up in the air cleaner on these models as well.

Good Luck
Steve

Apr 12, 2011 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

1988fxstc. Oil is blowing out of what looks like a oil tank vent hose that ends down by the rear tire. This is not the drain hose, but looks like a venting hose that is open near the rear tire. Anyone...


Without seeing the bike, I would guess that this is the crankcase vent. Originally, the crankcase vent tube came up from behind the oil pump and went to the backside of the air filter. A lot of owners changed the routing of this hose due to oil being blown into the air filter. They simply remove the metal part of the tube and replaced it with a short open ended hose running back and ending just forward of the rear tire.

As for the oil blowing out of the tube, it depends on how much oil blows out of the tube. If it's just a mist that will sometimes coalese into a droplet, this is about normal. But, if it's a steady drip or flowing oil, this is not right.

If the mist is heavy, this could be caused by excessive blowby on the rings creating high crankcase pressures. The use of synthetic oil should not increase the blowby unless the rings are in poor shape, then it will. The use of synthetic oil seems to aggrevate any minor leak turning it into a much larger leak.

If the oil is coming out in a steady stream or pumping the oil out of the engine, you proabably have sheared a key in the scavenge gears of the oil pump and it's not pumping the oil back into the oil tank.

Now there is a vent hose on the oil tank but it should be routed to a fitting on the crankcase that is located just above and slightly behind the top of the oil pump.

Good Luck
Steve

Oct 17, 2010 | Harley Davidson FXST Softail Standard...

2 Answers

97 XR 250. AFTER RUNNING FOR A LITTLE TIME THE CRANKCASE OVERFLOW STARTS FLOWING(OIL). IF IT WERE RINGS WOULDNT IT START LEAKING IN THE BEGINING AS WELL.


No, because it may take some time for the oil to heat up and expand. Then, once this happens, the oil can begin to get whipped up by coming in contact with moving engine and transmission parts. Oil foaming can occur and over-run the crankcase ventilation system.

To help eliminate this problem, be sure to use the correct oil as recommended in the Honda owner's manual. Do not overfill the crankcase with oil. Change the oil and filter more frequently - especially after riding through deep water crossings.

If you suspect worn piston rings, check the spark plug for oil contamination and perform a cylinder compression and leak-down check.

Oct 28, 2009 | 1997 Honda XR 250 R

2 Answers

Oil leaking everywhere air cleaner full of oil seems to be blowing up thru carbie still runs but oil loss cant be good.......Kevin


its called blow by.you have compression leaking past the rings,which is pressurizing the oil and the pcv system which burns crankcase fumes,is now putting oil into the carb.put a filter that is not too restrictive in front so the air,not oil goes in the carb.eventually the oil will gum up the system.in the 60s the engines had braether caps and did not reburn the crankcase fumes.

May 15, 2009 | 1990 Ford Festiva

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