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Post by jjoshua20213 on Dec 29, 2013 14:23:49 GMT -5
Its a 1p39qmb. Also, what causes them to go bad. I know excessive pressure, but besides that. I have an abused old 2007 engine with no problems and a 2012 bike with blown oil seals. I'm talkin half a talk of oil gone a day. Its soo much oil it ruined my cvt to the point where its slipping or seizing, nothing inbetween. Valve vent is functioning alright so i'm ruling out pressure. This all started after I installed new piston rings and an A9 Cam The leak was major but tolerable, now its like I miles well have a 2 stroke. It uses more oil than gas  If I have to split the crank case i'm tapping out. |
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Post by alleyoop on Dec 29, 2013 14:34:23 GMT -5
So your saying oil is coming out behind the Variator and by the Stator is that where the OIL IS COMING OUT?
The oil seal on the LEFT side is BEHIND the Variator and easy to replace.
The oil seal on the RIGHT side is INSIDE the plate that the stator is bolted to so the right side is a little more work because the Oil seal is actually inside the COVER. But you do not have to split the case.
Alleyoop
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Post by alleyoop on Dec 29, 2013 15:05:53 GMT -5
Here are pictures of where the Crank Oil Seals are: Alleyoop   |
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Post by jjoshua20213 on Dec 29, 2013 15:56:33 GMT -5
Its just the variator side. So what do I just remove the variator and pick out the old one and stick in a new one the same way I removed the old one?
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Post by alleyoop on Dec 29, 2013 16:31:19 GMT -5
Cool, easy as pie just try not to scratch the case where the rubber seal sits in when picking it out. Then slip the new seal in and your done.
Alleyoop
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Post by jjoshua20213 on Dec 30, 2013 13:14:17 GMT -5
Cool, easy as pie just try not to scratch the case where the rubber seal sits in when picking it out. Then slip the new seal in and your done. Alleyoop Thank god! I know this is a dumb question because I already know the answer is no its going to leak, but can I take the one off my other bike and put it on this one? |
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Post by alleyoop on Dec 30, 2013 13:19:33 GMT -5
You can try, but order new seals just in case because if you damage the seal taking it off the other bike it will leak.
Alleyoop
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Post by JR on Dec 30, 2013 14:12:36 GMT -5
This all started after I installed new piston rings and an A9 Cam The leak was major but tolerable, now its like I miles well have a 2 stroke. It uses more oil than gas If I have to split the crank case i'm tapping out. If the rings were not properly installed you may have a lot of pressure going into the crankcase blowing the oil out past the seals. The ring gaps need to be staggered properly so the compression and oil is kept in the right place. FYI, I was taught that once a seal is removed, never put it back. The risk of it leaking is great and the work has to be done all over again. They are really cheap and I'd never pull one from one motor and put it in another. |
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Post by woowilly on Dec 30, 2013 16:57:08 GMT -5
Part of properly installing new rings is honing the bore to break the glaze so the rings will seat. Installing new piston rings without giving the cylinder a light honing will lead to it taking a long time for the rings to seat if they ever even seat. ( there'll be more than the normal amount of blow by and oil burning 'till they seat.) Here's a link on ring seatingGoogle piston ring break in or seating for more info. The procedure I've always followed is: lightly hone the cylinder if it's a used cylinder, gap rings to spec. or at .003 inch per inch of bore if no spec. available, then accelerate under load to a moderate rpm a few times, stop and let it cool down, repeat 5 to 10 times, then go easy the first 20 miles. Try for lots of stop and go driving and warm up - cool down cycles for the first 50 to 100 miles. Until the rings seat avoid long periods of idling, long periods of running with no load, high rpm. |
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Post by alleyoop on Dec 30, 2013 17:16:44 GMT -5
He did not say he was burning oil he said it was leaking oil past his crank oil seals so it has nothing to do with his rings at this point.
Alleyoop
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Post by JR on Dec 30, 2013 20:26:52 GMT -5
I certainly understand what you are saying Alley but if pressurevis blowing through the rings into the crank case it could force oil out the seals. I know this from personal experience with oil puking out the front seal in a truck I had years ago.
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Post by alleyoop on Dec 30, 2013 22:45:02 GMT -5
I will say again it has nothing to do with the rings , Rings should seal period NOW if the PCV VALVE in the Valve cover or the hose are not VENTING then yes that would create pressure in the crankcase and even blow out some gasket. But RINGS causing this not on your life.
Doug, You do know that the Left Side where the CAM chain connects to the crank is wide open right? All the way from the Top of the Head to the Crankcase. If pressure builds up in the crankcase it would mean the pressure is also in the Top of the head by the rockers and what per say alleviates extra pressure..THE PCV valve and the Vent Hose, now if the VENT hose is KINKED or BENT or the PCV Valve is not venting then blowouts could happen if there is enough pressure. I don't think I can explain it any simpler than that.
It could also just be OLD SEALS don't forget they are made out of rubber and inner part of the Oil seal rotates with the crank the outer part of the seal is stationary JUST LIKE A BEARING. They do wear out and get weak and get pushed out sort of walk off the crank as they say.
Alleyoop
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Post by JR on Dec 30, 2013 23:05:44 GMT -5
I don't think I told him to take the head off and look.He said it started after the rings were changed. So I was just thinking well what might have been done wrong to make it blow oil out the seals. Seems resonable to think that perhaps the rings were done wrong. The rings I have changed have oil wiping and compression rings. If the compression ring gaps are close enought and let pressure through, where else would it go but the crankcase.
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Post by alleyoop on Dec 30, 2013 23:13:40 GMT -5
I am done I think I explained it in simple terms the OP can decide what he wants to do.
Alleyoop
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Post by jjoshua20213 on Dec 31, 2013 8:27:09 GMT -5
Thanks everyone! I think this is just another case of my bad luck and the seal went out on its own. The rings were carefully installed and everything was done right, the cylinder was dirt cheap to begin with so re-using it was probably a bad idea, but is unrelated to this problem.. I have replacements on the way. I noticed when the oil is full it comes out the most, and when the dipstick reads mid-low readings it leaks less. That would make sense. Less oil=less oil pressure.
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..BAD TO THE BONE..
