got a bad oil leak :/

[artsehcro09]

hey hows it going! i just bought a SunL LB250-T4. its 4 yrs old and it has 5000 miles on it. this is my first bike and i dont know to much about them. i am eager to learn though!

i have a really bad leak that started yesterday and i noticed when i got home from work that i was covered in oil and so i the rest of my bike
http://farm3.static.flickr.com/2663/5719391421_c1dd68cd98_s.jpg (http://www.flickr.com/photos/9030734@N05/5719391421/)

here is a couple of pics of where i think i have narrowed the leak down to.
http://farm3.static.flickr.com/2635/5719391531_2358cb27a5_s.jpg (http://www.flickr.com/photos/9030734@N05/5719391531/)
and now a little closerhttp://farm3.static.flickr.com/2525/5719952666_d44ec46a5d_s.jpg (http://www.flickr.com/photos/9030734@N05/5719952666/)
and from the opposite side
http://farm4.static.flickr.com/3054/5719391315_2b6a67efec_s.jpg (http://www.flickr.com/photos/9030734@N05/5719391315/)
has anyone had this problem before and know of how i might go about fixing this? please help :D

[Weldangrind]

Welcome!

It looks like the leak is originating from the vent hose. That hose on the top of the engine is designed to vent excess crankcase pressure to atmosphere, and some oil vapour is carried with it. Perhaps the hose has a crack in it (common to Chinese hose). If you replace the hose with good quality parts store stuff, it might be solved.

[artsehcro09]

which hose exactly are you talking about.. i think you talking about the bigger one that i have labeled "A" here but im not exactly sure.
http://farm3.static.flickr.com/2525/5719952666_d44ec46a5d_s.jpg (http://www.flickr.com/photos/9030734@N05/5719952666/)
http://farm3.static.flickr.com/2399/5719415337_b65430edf4_s.jpg (http://www.flickr.com/photos/9030734@N05/5719415337/)
now the part that i have labeled "B" is like a stem that a hose looks like it would fit on. the same hose that i have labeled "C" is on the opposite side there but i doesnt lead to anything. so im guessing its a breather. but anyways the "B" stem is wet with oil to the touch when the engine is off but dry when it is on. so thats making me think its like a vacuum of some sort. THANKS!!!!

[artsehcro09]

i do believe you are talking about this hose here
http://farm4.static.flickr.com/3496/5719424471_085ea60988_s.jpg (http://www.flickr.com/photos/9030734@N05/5719424471/)
this hose has a clamp on both ends but the other end doesnt go anywhere. this hose is supposed to be a breather correct?

[artsehcro09]

sorry somehow the pictures deleted....i put them back but they are smaller..you can just click on them though and they will get bigger.

[JimmyFingers]

mine started leaking from the vent hose one time because I put too much oil in after an oil change. Fixed it by sucking out some of the excess oil...fingers

[artsehcro09]

I know that is a possible reason for an oil leak but i hadnt added any oil to begin it just had what it already had in there. i checked it when i bought it and it was fine. but i checked it last night after i notice the leak and i was damn near empty. so where ever its coming from its just hemoraging oil.

[Barnone]

i do believe you are talking about this hose here
http://farm4.static.flickr.com/3496/5719424471_085ea60988_s.jpg (http://www.flickr.com/photos/9030734@N05/5719424471/)
this hose has a clamp on both ends but the other end doesnt go anywhere. this hose is supposed to be a breather correct?
I believe that hose that vents the crankcase should go to the air box or air filter.

[artsehcro09]

i do believe you are talking about this hose here
http://farm4.static.flickr.com/3496/5719424471_085ea60988_s.jpg (http://www.flickr.com/photos/9030734@N05/5719424471/)
this hose has a clamp on both ends but the other end doesnt go anywhere. this hose is supposed to be a breather correct?
I believe that hose that vents the crankcase should go to the air box or air filter.

i have looked hard for where this hose might go and there is no place at all

[Barnone]

Has someone removed the air box? Does the bike have an air filter? Take a photo of the carb but back some distance so we can see more..

[artsehcro09]

http://farm4.static.flickr.com/3635/5720007649_f5f706842a_z.jpg (http://www.flickr.com/photos/9030734@N05/5720007649/)

[artsehcro09]

http://farm4.static.flickr.com/3039/5720000705_acf779537b_z.jpg (http://www.flickr.com/photos/9030734@N05/5720000705/)

[artsehcro09]

http://farm3.static.flickr.com/2587/5719952931_4a7247a86b_z.jpg (http://www.flickr.com/photos/9030734@N05/5719952931/)
http://farm3.static.flickr.com/2113/5720518240_c3421c0aee_z.jpg (http://www.flickr.com/photos/9030734@N05/5720518240/)

[artsehcro09]

http://farm3.static.flickr.com/2699/5720613172_7b468a41fc.jpg (http://www.flickr.com/photos/9030734@N05/5720613172/)

[Barnone]

There should be a nipple on that air box aft of the carb to attach that hose to but I can't see it in your photos. Is the air box still on the bike?

Did you determine that the oil was leaking out of that hose?

[artsehcro09]

I do believe that that jose is the one that is leaking. I took the seat of and cleaned out the air box butthere is no place on it at all for that hose. Weldangrind said that that hose might need to be replaced so I flipped it on it's other side and so far it has leaked but I'm not really able to ride it. There is a part now on the frame that has broken it's weld and is rattling really bad. It's one of the frame bars down in the front kinda where the exhaust pipes come from the engine. I just gotta find a welder now.

[Weldangrind]

There is a clamp on the end of that oily hose, so it likely connected to something. On our atv's, that hose simply routed behind the engine and points at the ground.

[artsehcro09]

I checked Aall over the air box and isn't anything that the Hose could go to. It's not even long enough to go to anything.

[artsehcro09]

Since that hose sometimes just goes to nowhere like you said maybe that extra clamp is just there bc that is a pretty generic part/hose and the extra clamp just never got taken off. A simple fix maybe I could just make the hose longer and may that would give it a little more room to breath and less might actually spill out? Anybody think that might work

[Weldangrind]

The simple answer is to just replace the hose with a longer one, and point it to the ground behind the engine. That's the way all of our bikes and atv's are.

[artsehcro09]

Great I was hoping that it would be that easy. Now I gotta get that frame piece rewelded and I should be good to go! It's only about a one inch weld and I don't know anybody besides just taking it to the shop. It shouldn't cost too much would it?? A lot of my friends have been asking me if I regret buying the bike bc I have been having to work on it since I bought it. But like hell no ive enjoyed the little time I've had to ride so much I'm just ready to be ready to ride again. Thanks everyone for the help!!

[Barnone]

Someone has butchered up your bike if you can't find the place where that hose attaches. Either way oil should not be leaking out of that hose because it is just a crankcase breather. You probably have a major engine problem that is forcing oil out of that hose.
Good luck.

[Weldangrind]

I would agree, except that the hose has an odd S-shape to it, and it terminates above the engine. If I re-routed my vent hose to look like that, I'd fully expect oil vapour to collect there as well.

I do agree that the hose was originally designed to clamp to something, given the odd shape and the clamp on the end. No matter. A new hose that terminates above the ground will likely solve the problem. If oil seems to pour out of the hose after that, it might be a ring seal issue.

[artsehcro09]

Im at the bike shop and they are saying it a gasket that is bad. How can I find a replacement these guys are saying I won't be able to. And they don't seem too willing to help. More just why in hell would you buy a china bike!

[FastDoc]

Others will chime in but I think your motor is a clone of a rebel 250 so a gasket for that should work. Also if it's a simple looking one making your own is ot hard and good practice.

Read this:

http://www.dansmc.com/gaskets.htm

[Weldangrind]

A shop that doesn't specialize in China stuff is just a quick way to lower your self-esteem.

Which gasket are they saying is leaking? Can you show us? I'm not buying that diagnosis yet.

[Barnone]

A oil leak out of a gasket is better than oil blowing out of the crankcase vent.

[artsehcro09]

Ok good news, when I got home from the shop I figured everything out and got the leak fixed. The guy at the shop would only weld the frame back and he wasnt really anxious to help me out with anything else. But on my way back in inside my apt complex and I took at look at a similar bike and i noticed that the bolt on my crank case had rattled out so I went and got one, tightened it in there and everything cleared up. no more leaks at all.

[artsehcro09]

I also switched that vent hose out with about 8 in of regular 3/8 hose and diverted it to rest right above the chain so If anything does come out it'll at least oil the chain. The guy at the shop did point out a spot where it looks some sort of box or catch or something might just rattled off and he thinks that's where the original vent hose went. But still he wasn't much to offer any sort of help or advice. So again I really would like to thank everyone who's helped!

[Weldangrind]

You're welcome. :D

Can you show us which bolt required replacement?

[artsehcro09]

Here is the new vent hose I put on there
http://farm3.static.flickr.com/2134/5738121048_5682b515f9_z.jpg (http://www.flickr.com/photos/9030734@N05/5738121048/)


And here is that bolt that rattled out. It's right above where it says 233cm
http://farm3.static.flickr.com/2261/5737563051_3d4ae022f2_z.jpg (http://www.flickr.com/photos/9030734@N05/5737563051/)

[Weldangrind]

It's hard to tell from the pic, but is that hose pinched behind the side cover? It must be totally unobstructed, or you'll create a leak elsewhere.

[artsehcro09]

I'm not really sure which one you are talking about but checked again and I'm not seeing anything. I think it might just be the picture

[Weldangrind]

I'm talking about the new vent hose you just installed. I hope it's just the pic.

[artsehcro09]

Oh ok ya the new vent hose isn't squished or nothing it just sitting freely in there pointing right above the chain. There is quite a good size gap there that it's sitting in.

I do see what you're talking about in the picture how it looks squished it's just a bad angle :D

[Barnone]

Not a biggie but shouldn't you have a filter on that vent hose? When you engine cools you will be sucking unfiltered air and what not into your crankcase. I would get rid of that long hose and just use a short hose with a crankcase breather filter sticking up.

[Weldangrind]

That's a good idea. :idea:

None of my off-road machines have a filter on that hose, but I can see the logic.

[artsehcro09]

I am now in need of a cam chain :/
It's a sun l lb250. I remember somebody here telling me that it is a rebel 250 clone and I was wondering if I could get the chain for that bc I can't find it at all.