Oil leak from crankcase breather

[berl]

The crankcase breather is puking out oil pretty good and I cant determine why so I hope you guys can help me with some ideas. Compression on all the cylinders is 145-150psi. Breather tube out of valve covers is not plugged. I took off the cover and looked inside just some oil mist in the middle but nothing on the wire mesh. Oil is filled just bellow the full mark on the sight glass. When running it flows out of the 1/8th inch tube and out of the top of the fitting.

[kdo58]

it is probably blow buy, I added some hose and routed it to below the engine. Some guys use a catch can, I also plugged the hole on the air box.

[rapidray]

With the bike standing up level, on both tires, the oil level should only be at the MIDDLE of the widow. I'll bet if you remove some oil, it will stop pushing it out the breather! If not then you have a LOT of blowby. With the compression #s you gave I don't think that will be the issue though. Ray.

[BassCliff]

Greetings and Salutations!!

Hi Mr. berl,

How about the tube at the top of your airbox where the breather tube attaches, is that clear?

I just stopped by to welcome you to the forum in my own, special way.

If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....

Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", the Carb Rebuild Series, and the Stator Papers. Now let me roll out the welcome mat for you...

Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike!

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff

[berl]

Ill drain some oil and give it a try and see where that gets me. Thanks for the help

[klarz77]

Hi,first time on this site,,I have the same problem with a 1982 GS1100 GL,,oil is pumping out of the small breather plug(at lest that is what the parts fish calls it,,Crankcase model D referance 22 in the picture),,Should the tube be running back into the motor under the starter??