oil and gas leaking from drain tube... - 600RR.net
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post #1 of 15 (permalink) Old 02-24-2009, 02:07 PM Thread Starter
 
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Unhappy oil and gas leaking from drain tube...

Need help. I noticed a stain in my drive way after taking a break from riding. There is a fluid leaking from one of the two drain tubes. It has the smell of gas, but has the tint and texture of oil. the bike is a 2008 cbr600rr, w/5000 miles. Oil is changed every 2000 miles and i use 3 quarts of amsoil 10w-40. I don't know if it is relevant but I just installed a 2 bros. slip-on a week ago. Any help is greatly appreciated.

Last edited by deja vu; 02-24-2009 at 02:12 PM. Reason: addition
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post #2 of 15 (permalink) Old 02-24-2009, 02:12 PM
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If the fluid is visually leaking (drop, drop, drop...) then we have a problem. Otherwise, it sounds like a little patch just sitting there after a while and that shouldn't be an issue. I've seen that under my bike, smelled the same, felt the same, I just figured "hey, they're drain tubes for a reason"...

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post #3 of 15 (permalink) Old 02-24-2009, 04:02 PM
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If I fill my 07 slam full of gas on a hot engine and park it for a few minutes. The tanks will heat up and sweat gas out the vent tube . Only when parked slam full and hot. You may have ran into that situation as well .

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post #4 of 15 (permalink) Old 02-24-2009, 07:52 PM
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That oily drip down near the kickstand? That's probably coming from the drive sprocket area. It's a common place for chain fling too drip down from. On my 06 it drips down the front side of the sprocket and then down the side of the oil pan and kickstand area to the floor. Are you sure it is actually fluid coming out the tube? Check again with a light and trace the drips. Wipe it and go ride a bit then check again.

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post #5 of 15 (permalink) Old 02-24-2009, 09:28 PM Thread Starter
 
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I layed down on the ground and looked up near, around, and in the tube. The fluid is definitly coming from in the tube. The tank is 3/4 full. However I wiped the tube dry, rode it and checked again. It is not leaking any more, or at the moment. I guess I'll take it to the stealership if I see it again. Thank you for the replies though, much appreciated! Quick question if anyone wants to give there .02 , should I look into a extended warrany before the factory runs out?
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post #6 of 15 (permalink) Old 02-26-2009, 11:25 AM
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Quote:
Originally Posted by deja vu View Post
should I look into a extended warrany before the factory runs out?
Depends. If you can afford to throw down that cash on some extra piece of mind go for it. It's also a good thing to have when selling the bike. Do I think you will actually end up using it? NO.

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post #7 of 15 (permalink) Old 02-26-2009, 03:05 PM
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Why do you only use 3 qts?

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post #8 of 15 (permalink) Old 02-26-2009, 05:13 PM
 
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my 06 is black and the tank get hot as hell when sitting in the sun mine will sometimes drip a few drops makes a spot about the size of a quarter
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post #9 of 15 (permalink) Old 02-26-2009, 05:17 PM
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those are OVERFLOW tubes, what is happening to your bike is normal, stop worrying.

Quote:
Originally Posted by shiftn3rdon1 View Post
Why do you only use 3 qts?
because thats how much oil the engine takes.
its actually 2.8L w/ a filter change, which is just under 3 quarts.
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post #10 of 15 (permalink) Old 03-02-2009, 05:40 PM
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one of those is a coolant overflow hose, the other is a fuel overflow hose. it is either coolant, fuel, or both- not oil.

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post #11 of 15 (permalink) Old 03-04-2009, 10:16 AM
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One hose is a coolant overflow tube, one is a crankcase ventilation tube (heat will expell tiny amounts of oil) don't worry about it, and the other is the fuel tank vent tube.

I had an issue once with these tubes that I was un-aware of. I was doing a trackday and had full race bodywork on the bike. Meaning that the underbelly was toatally enclosed. Well, the night befor the trackday, it rained like Pigs and rabbits. The underbelly had about three inches of water sitting there (did not have a drain hole/plug installe yet). When I started the bike, it ran fine for about 5 seconds then died. What I didn't know was, when the fuel pump primes and that little vent tube from the tank was submerged in the water was bad ju-ju. When the pump primed (creating a vacuum) it sucked up a bunch of water and ceremoniously introduced it into the gas tank....water in fuel.....very bad. Anyway, I was up 'til 2am trying to drain all the gas out of the tank and lines. But the spark plugs were soaked with water droplets and would not fire. I had to wait until the local bike shop opened to get new plugs to install. I missed the first hour of the track day trying to get the bike to run.

Lesson learned on my part....$67 for 4 plugs....what a day.
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post #12 of 15 (permalink) Old 09-11-2011, 05:03 PM
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i am having the exact same issue. oil substance with gas odor coming out of one of the vent tubes. 2010 cbr600rr 5000mi. just occured today for the first time. idk what the deal is with it????!!!!
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post #13 of 15 (permalink) Old 09-12-2011, 07:47 AM
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Could be gas mixing with chain lube leaking down...

My advice: Don't worry about it unless it continues to happen.
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post #14 of 15 (permalink) Old 09-12-2011, 08:22 AM
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Quote:
Originally Posted by sdime95 View Post
my 06 is black and the tank get hot as hell when sitting in the sun mine will sometimes drip a few drops makes a spot about the size of a quarter
awesome bro, my bikes red but my tanks black, just like yours
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post #15 of 15 (permalink) Old 09-12-2011, 10:07 AM
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I think that's crankcase breather blowby fluid. Its supposed to go back into the airbox to be sucked back into the engine. Older Honda's (CB) had a stopper plug at the end of the drain tube. You would remove the plug and nasty brown oil and gas would come out.

Check to make sure the tube isnt gummed up.
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