06 Vector Mtn SE leaking oil but don't know why!

sclwald · Jan 4, 2011

I had some issues with my Vector three weeks ago with the rectifier. Have not been out to the garage for about a week and a half but this morning I went out and the oil that is supposed to be in my sled is now on the garage floor. I don't know where it is coming from. Appears to be from the oil tank side but it is not coming from the oil tank, the drain plug, or the filter. I see residue on the lower right side of the motor but nothing is there.

Is there something I am missing? The best I can tell is the lower hose off the oil tank runs into the lower right side of the motor and it is somewhere in this location.

I just don't get how I rode three weeks ago. Parked the trailer and a week and half later with no movement all the oil is on the floor.

Canoehead · Jan 4, 2011

If your sled was on it's side for any length of time the last time you rode you'll have oil slowly leaking out of your airbox. It might look like allot but it doesn't take much to look like trouble. So open your airbox and look for the white tell tale and clean if required. Also check your oil filter if you have replaced it with a non-Yamaha filter (they're longer and rub on the belly pan until a hole forms).
Good luck and hope this helps

TBird · Jan 4, 2011

A common issue is the oiltank, it cracks along the mounting plate, or @ the bottom hose fitting,
It problably leaks when the oil is hot, or when taken inside into where it's warm, cracks likes temperature changes,

sclwald · Jan 5, 2011

Thanks guys. I will check a little closer on the oil tank side. It is not the filter and it is not from being on it's side. There is at least 2-3 quarts of oil that leaked out.

Canoehead · Jan 5, 2011

I would definately suspect the tank or fittings then.

sclwald · Jan 5, 2011

The tank is still mostly full. Atleast still reading on the dipstick so it did not come from the oil tank. All from the motor. I am going to have to wait until this weekend to try and look into it deeper.

Eburg-Nytro · Jan 6, 2011

There is a Breather that runs from the tank to the airbox. It is very easy to disconnect or forget to reconnect. I would look under the airbox (right side) and see if its leaking from there. Good Luck

RXMax · Jan 6, 2011

Is this not the sled in another post that you said hit a rock??? I would be looking for lower motor damage.. I have seen it happen...

sclwald · Jan 6, 2011

Yes this is the same sled but why would it start leaking a week and a half after the incident. No visual damage anyway.

Thanks to all the input. Gives me a place to point my efforts on Saturday.

Canoehead · Jan 6, 2011

It's hard to believe there's 3 quarts on the floor when the total quantity of engine, oil tank with filter is 3.2 ltrs.

sclwald · Jan 6, 2011

Well I will see just how much is on the floor saturday. 3 quarts was a total guess as it is hard to tell when it is on the floor. But it does take up a spot under the trailer about 3ft by 4ft and then runs another 6 feet under my work bench. It has to be quite a bit.

Does anyone know how much oil is stored in the engine and how much is stored in the oil tank itself?

My thought process is to drain both seperately and then this will tell me if it is coming from the motor or the oil tank.

TRUEBLUEMAX · Jan 7, 2011

I lost about three quarts out of an engine once and the puddle was about fifteen feet across so I would say you are mire mike a quart or so. I think the motor itself holds half a quart.

Mtn-Track · Jan 7, 2011

Had a similar issue with my '07 and it was a crack in the 90* fitting on the bottom of the oil tank. It was a factory defect with the weld where they notched and bent the fitting, but I ended up having to buy one since Yamaha "has never had an issue with that fitting".:tsk:

On the bright side though, my oil tank is still attached to the frame...........for now..............

sclwald · Jan 8, 2011

Thanks for all the input and advise. Tore the sled down a little today. Found the lower crankcase breather hose came disconnected. I would assume when I had the airbox pulled to the side to get to the battery after rectifier problems. Checked the motor and oil tank and didn't see anything out of the obvious as far as the tank goes or the 90 degree fitting.

The oil spot on the garage floor must have been diseaving. I don't know how much had leaked. Seemed like alot to me. My thought process is since it was about 1/2 quart low in the oil tank that it was not leaking since there was still oil in there. Along the same lines if I topped off the oil tank and started it, if the motor had leaked out that the oil tank would be sucked dry pumping it all in the motor. Topped off oil tank and let sled run. Stayed full therefore I assume the motor still had the oil that it origionally had in it.

Only time will tell after a test ride. Will let it sit this week and check for more oil spots.

sclwald · Jan 8, 2011

Does anyone know if the oil monitoring system shuts the motor down in low oil conditions or just gives a warning light?

I am afraid of ruining the motor with oil problems but if I keep a tight eye on it hopefully I can catch it if the fix was not the crank case breather hose.

I just can't beleive that ammount of oil would come out of a breather hose but who knows.

Just crossing my fingers.

BigFish BC · Jan 8, 2011

one other thing to check is the little drain bolt that is just off to the side of the filter under the motor if it comes loose it will seep oil there while sitting.most guys dont use it to change oil but its there to empty the bottom of the motor case of oil.

Canoehead · Jan 9, 2011

Great! Glad to hear you found the culprit!! I believe you'll get a low oil light and then she should shut down. And like I mentioned earlier alittle oil on the floor looks like a horendous amount.
Have fun and good sledding!!

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06 Vector Mtn SE leaking oil but don't know why!

sclwald

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Canoehead

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TBird

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sclwald

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Canoehead

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sclwald

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