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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Gas in the oil /cgi-bin/YaBB.pl?num=1342213580 Message started by splash07 on 07/13/12 at 14:06:20 |
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Title: Gas in the oil Post by splash07 on 07/13/12 at 14:06:20 I got a bunch of gas in the crankcase from leaving my raptor in the on position, do I need to do anything other than just drain and refill? |
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Title: Re: Gas in the oil Post by cafecarl on 07/13/12 at 14:26:41 Hey, I know I haven't been around S40s much but I've been around bikes awhile, "Right on" on the drain and refill but you've got to figure out what's happening with the petcock. 2+ gallons of head pressure wanting to drain into your crankcase is not a road you want to take. |
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Title: Re: Gas in the oil Post by Greg on 07/13/12 at 14:28:27 Clean and dry the oil filter or just replace it. You should look into why it happened. Just leaving a Raptor on shouldn't do that. |
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Title: Re: Gas in the oil Post by Greg on 07/13/12 at 14:29:24 Carl beat me to the punch! ;D |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 15:33:16 Any other suggestions for why it might happen? I just finished building the bike, was fine for the few days I had the raptor off, then I left it on for about two days and I believe about a half cup to a cup of gas slowly leaked through the carb. Open to other ideas, willing to leave no stone unturned to fix this annoying problem. Im on my second oil change and I dont want to change it again for a while. |
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Title: Re: Gas in the oil Post by Serowbot on 07/13/12 at 15:54:01 If the Raptor was off,... it's a dirty, or worn out float needle, or the floats are sticking or leaking... Pull the floatbowl and look around... ;)... |
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Title: Re: Gas in the oil Post by Gyrobob on 07/13/12 at 15:54:37 In far northern climes, bush pilots used to dump some gas into the crankcase of a hot engine, idle it for a minute, then shut it down and cover it up with blankets, etc. This makes the oil thin so the next morning when it is 20 below zero the oil will be thin enough to allow the motor to turn over. 10w oil is clay at that temp. The gas evaporates in the first few minutes of running the next time the motor is started. So, if you only got 1/2 cup into the oil, I wouldn't worry about it. It'll evaporate shortly. I would find out how it happened, though, so you can stop it from happening again. |
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Title: Re: Gas in the oil Post by verslagen1 on 07/13/12 at 15:56:53 495F48554D58554E3A0 wrote:
+1 once had a bunch of lint in the valve seat screen, so pull it too and inspect, clean. |
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Title: Re: Gas in the oil Post by Oldfeller on 07/13/12 at 15:58:02 disqualified -- issue was preexisting again Sorry Routy Routy is VERY PLEASED that you have finally arrived. You validate his long held beliefs (and he has needed that boost, believe me). (fireworks burst into the air and angels start to sing your praises, then they stop abruptly and go home) =================== Now, before you say you had a Raptor failure -- think for a minute. The Raptor is working correctly, simply turning your gas on and off. In reality, your carb float needle valve is leaking on you (or your float is stuck in the down position in the float bowl) Turn the Raptor petcock on and take a big screwdriver handle and whack the float bowl a time or three pretty hard to jar the float bowl free. If your problem stops -- then your float was simply stuck. If the issue continues, then you will have to drop the bowl on your carb and 1) adjust your float height and check for any burrs and hang up points in the float/valve travel 2) check your float assembly for gasoline inside the float by shaking it and listening for any sloshing inside (very very rare but it does happen) 2) replace your float fuel needle valve (they can be damaged by carb cleaners, etc -- the rubber swells and or dissolves and they stop sealing off correctly) Question: Did you just work on your carburetor by any chance? |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 16:03:49 I did just work on the carb. I took it apart cleaned with carb cleaner, with most of the rubber parts removed, I did not remove the float or float valve during this process. |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 16:05:45 how will I know if its just stuck, in other words, how do i know the tapping jars it loose and stops the flow of fuel? |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 16:10:00 5A495E5F404D4B49421D2C0 wrote:
+1 once had a bunch of lint in the valve seat screen, so pull it too and inspect, clean.[/quote] Can you tell me where to find the valve seat screen? Also, it looks like I will be pulling the float, so can anyone tell me the best method for removing the float pivot pin? |
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Title: Re: Gas in the oil Post by Oldfeller on 07/13/12 at 16:14:19 Sort of a meatball thing, isn't it? The whapping with the screw driver handle ?? You have a drain at the very bottom bottom of the bowl that in most cases can accept a piece of clear hose. http://i600.photobucket.com/albums/tt82/serowbot/rerun/CarbLeftweb.jpg directly above me Put some clear tubing on it and bend the clear tube up so it goes up the carb body (tape it or tie it so it doesn't flop around) so you can see what is going on inside the bowl. Crank the drain screw open so the level of the gas sitting in the clear tubing shows the exact same fluid level as what is sitting in the float bow. The gas level will have to show in this clear tube to visibly be "higher than the venturi"and thus be able to go down the throat, enter into your intake valves and go down your cylinder to get to your oil. And believe me, you have to be leaking a good bit to get it all the way up around and down into the oil. Stuck floats leaks a bunch, bad needle valve leaks fuel by the slow drip --- drip ---- drip ---- one slow drop at a time. Put on some clear tubing on and give her a firm whack or two and see if the gas level stays out of the venturi level now. Question: Why did you take your Carburetor apart? Was there an issue of some sort? |
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Title: Re: Gas in the oil Post by 360k+ on 07/13/12 at 16:22:19 5D5E424F5D461E192E0 wrote:
It's the float valve, which if operating properly, won't let the fuel get by even with the petcock open. You can suck on the fuel inlet with the float bowl pushed up (not hard, just enough to close the valve). You should not be able to suck air, otherwise it is not sealing properly. Remember, your fuel level in the tank is many inches higher than everything it flows into. If the bowl fills and the valve doesn't seal, the fuel comes all the way up and out of the jet(s), leaking down the intake tube, past the intake valves, into the combustion chamber, past the rings, and voila! |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 16:31:08 Took the carb apart to change jets since I modified the exhaust. I was having this problem before which I belive was compounded by a bad petcock, now if I leave the raptor on it will leak. So I will give the clear tubing a try first and see if it is just sticking. |
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Title: Re: Gas in the oil Post by Oldfeller on 07/13/12 at 16:37:49 When I was where you are now, I ordered a float needle assembly because I thought I had to have one. Still got it. May eventually need to put it in ..... float needle valves do wear out eventually on all float based carburetors. |
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Title: Re: Gas in the oil Post by splash07 on 07/13/12 at 17:19:13 OK, so I put the clear tube on, drained the gas that was already in the bowl with the raptor off. Then, tied the tube up higher than the bottom of the throttle body, turned the raptor on, tapped on the bowl with the better end of a large screwdriver, opened the drain screw and the gas went to about the bottom of the bowl while the bike was on side stand. Definitely no where near the bottom of the throttle body. Maybe I got it unstuck. I guess I will run the bike and we will find out soon. |
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Title: Re: Gas in the oil Post by Oldfeller on 07/13/12 at 19:31:24 Leave the Raptor on and see where the gas is in a couple of hours ..... (if ya got a case of the drips it takes a while for them little drips to accumulate) If you are still good after a few hours, try overnight. |
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Title: Re: Gas in the oil Post by 87 savage on 07/13/12 at 19:37:09 6F6C707D6F742C2B1C0 wrote:
Hey Spash07, Ditto what Oldfeller is telling you: replace the needle valve assembly. Once the carb bowl is off place a very small screw driver between the head of the float pin and the post and pry gently by rolling the screwdriver. After the float is out shake it to make sure there is no gas in it. The needle valve assembly is right below the float. Remove the one screw and hold down plate and pull the valve out with needle nose pliers. The screen is on the bottom of the valve assembly. Put it back together in reverse order with new needle valve assembly and it shouldn't leak anymore. It's cheaper to buy a carb rebuild kit that includes a valve assembly than to buy just the valve assembly. (If you can find just the needle valve assembly) |
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