Gas in Oil

[Dowee]

Ok guys,

A mechanic just told me that I have a strong smell of gas in the oil of my bike.

How bad is this? Could this be a result of major compression failure?

Or because my Carbs are SO bad they are dumping gas into the cylinders and it's leaking down terribly? Gas pooling on the pistons could cause a leak down effect into the oil, then gas in the oil would literally keep oil from staying on the cylinder walls.

What do you think?

Andy

[WillyD]

Stuck float in one or more carbs...most likely the cause...pull those carbs and send to Rick...best investment you will make...

Rick IS the MAN

[tmdoth]

Ok guys,

A mechanic just told me that I have a strong smell of gas in the oil of my bike.

How bad is this? Could this be a result of major compression failure?

Or because my Carbs are SO bad they are dumping gas into the cylinders and it's leaking down terribly? Gas pooling on the pistons could cause a leak down effect into the oil, then gas in the oil would literally keep oil from staying on the cylinder walls.

What do you think?

Andy

If your carbs are really that bad and you don't want to tackle them yourself, I would send them out. Gas stripping oil off the cylinder walls can lead to excess friction heat and seized pistons, whereas gas pooling in the cylinders can cause hydraulic lock.. either way you could be looking at buying a new engine.

[paulfun]

You are probably pushing excessive gass threw one or more carbs and that is what is causing the push of fuel into the block . Once the carbs are rebuilt and oil is changed you should be good to go.

Bottom line is get the carbs done right! I highly recomend sending them out to rick as I have seen too many half assed mechanics charge out the wazzo and only do a half assed job.

Any questions you might have about what the local mechanics might have said feel free to call!

[need-for-speed]

you'll want to dump that oil soon, gas thinned oil will take crank and rod bearings ot pretty quick

[need-for-speed]

you'll want to dump that oil soon, gas thinned oil will take crank and rod bearings out pretty quick
<!-- / message -->
<!-- controls -->http://www.zl-oa.com/forums/images/soness/misc/progress.gif

[vinny]

Agree with above advice BUT ALSO check your petrol tap.
If you have a sticky float and a leky fuel tap (should only flow with vac) then you could be looking at ther dreaded HYDROLOCK!

[WillyD]

Andy....Just a brief explanation...

Gas flows out of the tap into the carbs..Gas line connects to a "T" fitting between carb 2 & 3..Then the gas enters each carb through the needle and seat. It fills up the bowl and makes the float rise up. On the float is a needle valve that goes up into a seat. When the float is high enough, it pushes the needle up against the seat stopping the gas flow into the bowl. The float height is calculated to allow the amount of gas it needs to run all the carb circuits correctly...If you get a bad float or out of adjustment float height or even a piece of dirt in the needle and seat, the gas will continue to flow. It will over spill the bowl and leak out of the carbs into the airbox and/or the intake into the crank case (gas into oil)..The fuel tap is designed so that when the engine stops, vacuum is no longer at the port on the tap and spring pressure will close the tap stopping fuel from flowing....If the tap allows fuel to flow when the engine is shut off, then gas will eventually get into the cylinder and into the crankcase into the oil...If enough gas is in the cylinder when you crank the engine over, it can bend a connecting rod...

Liquid will not compress, the crank will push the piston up and something will give and that is usually the rod...all because of gas leaking into the cylinder...

[Dowee]

Carbs are off! Packaged and addressed to Rick! Getting them done right!

Thanks again guys, I'm a member of some kind of forum for every vehicle I have ever owned and this is by far the best place to get advice. Thanks again.