Question about 1981 Suzuki GS 750 L

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Gas leaking from right side of crankcase - 1981 Suzuki GS 750 L

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Is this gas/oil buddy as i dont think its possible

Posted on Oct 04, 2009

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What causes gas in crankcase


Gas in your crankcase is typically a sign of carburetor floats not set correctly. They allow too much fuel into the bowl which then overflows and goes into the cylinder and leak down past the piston rings and into your crankcase.

Jul 27, 2016 | Motorcycles

1 Answer

Mac2400 leaking air at oil breather hole


I have read both your questions and after taking both into consideration it sounds like it needs new piston rings. On a gas engine it is called blow by but both have a piston with rings on them, as they wear the end gap gets bigger and bigger allowing compressed air to bypass the rings into the crankcase where the oil is, the breather is there to allow air from the room to enter and exit as the piston goes up and down to avoid pressure or vacuum in the crankcase, the air on the top side of the piston is supposed to go into the tank but in your case some of it is going around the piston rings and into the crankcase building pressure and blowing oil out. There is not much inside a compressor like a gas engine, taking the head off and the oil pan should let you take off the connecting rod bolts and push the pistons out the top. This answer is based on the two comments of cant build all the air pressor and it is blowing oil out the crankcase breather. If you hit the 80 psi and unplug the compressor can you hear air coming from the limit switch box that the power cord goes into ? I will wait for your answer to continue.

Mar 23, 2016 | Makita MAC2400 Electric Powered Air...

1 Answer

Why would gas be in oil pan


Severely worn piston rings can force fuel into the crankcase during the compression stroke. If this were the case, you should essentially have a dead cylinder though, as the compression in that cylinder would be negligible. More likely cause is leaking fuel injector filling cylinder after vehicle shutdown until fuel system pressure bleeds off, then washing down side of cylinder wall into crankcase.

Mar 13, 2015 | Cars & Trucks

1 Answer

Gas in crankcase


This sounds like it is an older vehicle with a cam driven fuel pump mounted to the block. If so the fuel pump is bad and leaking fuel into the crankcase.

Feb 17, 2014 | Vehicle Parts & Accessories

1 Answer

Gas leaks, only when tilling, not when idling.


check the float level it might be set to high

May 17, 2012 | Garden

1 Answer

Makita dpc7311 leaks at crank


The DPC7311 is a two-stroke demolition saw, there should be no standing fluids, oil or otherwise in the crank case to leak out. The reason it uses a 50-to-1 gas-to-oil mix is so the oil in the gas can settle on the moving parts and lubricate them.
If you do have anything leaking anywhere out of your crankcase you most likely have problems with your carburator in that too much fuel is getting into and filling up the crankcase.
You should also look to make sure your leak isn't coming from a crack in the fuel tank or from the carburator or fuel line and running down to look like it's coming from the crankcase.

Feb 06, 2012 | Makita Saws

2 Answers

My 2006 vthunder classic will not start.i cannot get it to fire.just spins over but not starting. is there a fuse box on this bike?


Possibly the gas has flooded out the carburetor. Happened to me.

I don't know if it's the vacuum fuel pump leaking gas or the carburetor valves sticking slightly open. My solution was to have an on-off petcock installed upstream of the carburetor, just in front of the right side chrome side plate. I turn off the gas whenever I park the bike. So far that has worked, although I have other (unrelated) problems with this bike. The mechanic had to dry out the carb and check the crankcase oil in case gas had leaked into it.

This bike has a petcock system that is always on. It has normal and reserve positions (down and up) which let gas flow to upstream of the fuel pump and then a center prime position which feeds directly to the carburetor, in case vacuum from the starter cranking doesn't drive enough gas through the fuel pump, after the carburetor has dried out from sitting idle.

Jun 24, 2011 | 2006 Vento V Thunder XL

1 Answer

Have 307 86 gas in oil some pinging not really knocking or ticking. possibly diaphragm on gas pump allowing this through crank case or what should i do


there are only so many ways for gas to get into the oil.one someone purposely pured gas into the crankcase.two the engine is running very rich and not able to burn the excess gas,three the fuel pump is leaking gas into the crankcase,four the oil has not been changed regularly and the gas has thinned out to the point that it cannot seal the engine from the gas that normally is burned in the combustion chamber.If maintenance is regularly performed that fixes #4,I doubt that anyone would pour gas into the crankcase especially at the price of gas that fixes #1,if the carburetor is working as it was designed to then that eliminates running rich and fixes #2.if the above is good then the only thing left the fuel pump, can leak fuel into the crankcase and they won`t make noise necessarily.as far as the slight pinging one of two things can cause this, the engine is running slightly lean and or the timing is too advanced and needs to be reset to specs

Mar 02, 2011 | 1986 Oldsmobile Cutlass Supreme

1 Answer

Fuel leaking into crankcase on 2001 Honda CBR 600 F4i, Bike sat for 3 years tank had rusted religned inside of tank and changed fuel pump however when religning tank i filled vent tube so the tank didn't...


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

Jul 21, 2009 | 2001 Honda CBR 600 F(4)i Rossi

1 Answer

How come the gas mixes with the oil then when u drive it it shuts off


it seems to be a fuel related problem. the gas should not be going into the crankcase. It is leaking into the crankcase . The fuel system is somehow leaking into the crankcase because of excessive flooding, or other fuel related problem like a gasket . don't drive the car like that.

Feb 02, 2009 | 1993 Nissan Altima

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