Oil blow back on 84 IC with kol twin series II

[Aahicnow]

Yesterday was out for a ride and at one point noticed oil by the vents on the hood, stopped the machine and found that oil had blown back from the rubber tube from the block to the air breather. what would cause this all of a sudden? checked oil, levels good.

One more thing on this post was was doing a lot of grader ridge climbing, steep ups and steep downs ie > 45 degree climbs and drops , could this be a contributing factor?


SOLVED page 4 Update 4

[curtisbyrne]

my kohler magnum had the breather tube disconnected from the air-cleaner and stuff was blowing out of it,does it always do this?

[curtisbyrne]

whats the purpose and how do the oil breather work?

[wedge]

That's the crank case breather and it is suppose to vent to the air box. If your getting a lot of oil out of it your oil may be to full or thin. Unless your getting a lot of Blow by ??
A lot of WOT running can make you get a little also.

[Aahicnow]

ill have to clean up the area and see if it does it again

[ARGOJIM]

Check the compression.

[Aahicnow]

Look for low compression indicating ring problem??

[philipatmaxfour]

Look for low compression indicating ring problem??

yes

[racerone3]

Check the compression.

Also do a leakdown test. a very clogged air filter will act like a choke, and can cause oil to be pulled in there as well.

[Aahicnow]

IMG_0474.jpgIMG_0473.jpgIMG_0475.jpg

Also do a leakdown test. a very clogged air filter will act like a choke, and can cause oil to be pulled in there as well.

Can try but the tube is only basically sitting under the air breather by another hole, no real seal to the air breather box, the original connection spot on the air breather was interfering with the throttle cable(binding on cable at full throttle) so it had been moved. This is part of reason blow back was on hood and not all over the inside of the breather. PS tube was moved to postion in pic to see what was happening normally it was sitting under the breather

[racerone3]

If it has been routed that way for a while, and the issue just started, your oil may be diluted with fuel. that raises the oil level and thins it out. A stuck open float in the carb can cause that. smell the dipstick... if it smells of fuel, change the oil and see if the problem persists. Also, use a piece of hose from the breather to an old soda bottle zip tied under the hood somewhere (drill a hole in the cap big enough for the hose to go in. gatorade bottles seem a little more rigid than soda bottles) this will let you see how much oil it's pushing out and contain the mess

[Aahicnow]

Any tips on getting the oil out short of pulling the engine? I had heard about pumping it out via the filler tube but that's a no go, can't get a hose down the filler tube.As for smelling for fuel i will have to find someone to do that, car paint has destroyed my sense of smell, dog got sprayed by skunk and i could not tell, wife was not impressed when i let him in the house

[ARGOJIM]

If it has been routed that way for a while, and the issue just started, your oil may be diluted with fuel. that raises the oil level and thins it out. A stuck open float in the carb can cause that. smell the dipstick... if it smells of fuel, change the oil and see if the problem persists. Also, use a piece of hose from the breather to an old soda bottle zip tied under the hood somewhere (drill a hole in the cap big enough for the hose to go in. gatorade bottles seem a little more rigid than soda bottles) this will let you see how much oil it's pushing out and contain the mess

Also could be a failing fuel pump as if they leak they will fill the crankcase, I didn't think to think of race's analogy. Have you checked the oil level yet? Just as easy as the smell test, if it's over full and thin as water then fuel is the issue.

[racerone3]

Also could be a failing fuel pump as if they leak they will fill the crankcase, I didn't think to think of race's analogy. Have you checked the oil level yet? Just as easy as the smell test, if it's over full and thin as water then fuel is the issue.

Good call Jim, I forgot the pump on them is in the top of the block.

[curtisbyrne]

mine want that bad only a small drop and that was it.