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gas in oil pan

A

Anonymous-0

Well-known Member
I have a Internation 404 that has been overhauled,including a new carbureter kit. I'm getting gas in the oil and then I lose oil pressure. Is the problem with the carburetor or could it be something else?
Thanks, for any help!
 

If your getting gas in the oil and loosing oil presure the carb float is stuck in the open position .
Please don't tell us it was one of those Tractor supply carb kits ! You can't skimp on the carb rebuild kit, there is alot of crap being put on the market these days .
 

Okay, you gotta tell me how it could POSSIBLY be the float.

These tractors have UPdraft carbs, which means the carb is below the intake manifold. For that much gas to get into the crankcase because of a stuck float, the entire intake manifold would have to be filled SOLID with gasoline before it would flow into the cylinders, and into the crankcase.

Then the tractor wouldn't run, and would hydro-lock the second he tried to start it.
 
Not sure what Yesterday's Tractor thinks of your reply, but I did order the carburetor kit from them. Sounds like I may have to get a new carbuetor.
 
Not sure about a 404 but if it has a fuel pump on the side of the engine that is the likely culprit. if not it is probably missing while running and hte fuel in that cylinder is getting in the oil. Roy
 
You also can not skimp on the knowledge needed to rebuild a carburetor. Those Tisco kits are are actually quite good.
 

As well as my Super M i own a 55 cub that has a up draft carb. I have rebuilt it several times[ carb] but every now and then the float sticks and it fills the cylinders with fuel and the motor won't turn over.

The weight of the fuel in the tank pushes the fuel past the needle and seat and fills the cylinders.

This has happened to many people. If the gas in the cylinders washes them down and you have low or "no" compression shoot some oil in the cylinders to lube them and it will come back.

I had this happen on the Super M before the carb was rebuilt as well.
 

Byron,

You do NOT have to get a new carburetor. There is only one, maybe two reasons you would EVER need to get a new carburetor:

1. Your carburetor is lost/stolen/never existed.
2. Your carburetor is physically broken, as in smashed, cracked, or somehow bent out of shape.

Carburetors can ALWAYS be rebuilt. It's a matter of learning how, and it might take a few iterations to get it right if you're not a seasoned expert. Just keep trying.

Frankly I do not know what is wrong with the "cheap" kits. They're the same kits you buy at the CaseIH dealer, just less expensive.
 
Ive had this happen in Ford and JD tractors.Gas gets by the rings and ends up in the crank case.Engine will crank but turns hard because of oil dilution.Engines with fuel pumps can let gas into crank case if the diaphragm leaks.most pumps will show outside gas leakage.Never say never when working on engines.Ive had a JD H run on with the gas line disconnected, not just 5 minutes but run on.The tractor had some gas dilution and was pulling fuel thru worn intake guides.
 
You can leave the gas valve turned on 99 times and get away with ,#100 will get you.While the needle and seat is always blamed, dirt in the gas is the problem.There is stuff that gets past the screens.Ive found grass,hair and fine rust in carberators.Bits of teflon tape and silicone are common,dont use this stuff on fuel sysrems...The ball valves and viton tipped needles will stick shut and leak too...
 
I had several fuel pumps fail by leaking gas into the oil pan on my 544 (one of them was a brand new replacement from IH). I solved the problem by installing an electric pump from NAPA.
 
mkirsch, thank you for that bit of wisdom. I have rebuilt countless carburetors using the Tisco kits, and I have sold even more of those kits to folks who rebuilt their own carbs, and I have never had a problem or complaint.
 


I think this happens on the farmall due to the oil bath air filter.

Water will always find its own level !

The air tube to the oil bath will always fill with fuel even with the cylinders.

It's crazy how this happens but it does.
 
Thank you all for your information. I plan to order a new kit and do another overhaul, plus a new float. I'll be back later this fall with questions on my 3-point lift that lowers real slow and the pto that has no asjustment left and runs most of the time.

Thanks,Byron
 
Back in the '30's and '40's many piston driven aircraft had "Oil Dilution" systems. These systems used av-gas on cold winter days to thin the 60w oil until things warmed up a bit.
 
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