Little oil leak...

[activpop]

That oil line that goes into the rear of the sump and is attached by a  brass nut has developed a slow drip. Before I yard on it, which I am hesitant to do, what should I know about that connection. Is it a compression fitting or in need of a crush washer or something? I have someone looking at the bike this coming week, and would like to fix it. Thanks!

[gstallons]

IF the leak(s) are at the connections you need a 01154230 gasket and a 90706010 o-ring . The gasket will go between the fitting & pan and the o-ring will go between the fitting and the breather hose that goes up to the frame. 

If it is the hose , you will need a 01154631 pipe. 

 

[docc]

The fitting on that oil return line to the rear of the sump changed from the early AN fitting to the later (double) O-ring.

I discovered, the long and hard way, that oil dripping from that line may well be coming from another source, though . . .

[docc]

After chasing this issue for months, my wet sump return line was traced to spooge from the tank vent that was zip-tied to the return line . . .

[gstallons]

Hmmm. my input is "for entertainment purposes only" . 

[activpop]

15 hours ago, gstallons said:

IF the leak(s) are at the connections you need a 01154230 gasket and a 90706010 o-ring . The gasket will go between the fitting & pan and the o-ring will go between the fitting and the breather hose that goes up to the frame. 

If it is the hose , you will need a 01154631 pipe. 

 

Idk when I'm going to learn this lesson. After your post I said, Duh, pull out the parts catalog. I saw everything you described in detail. Thanks for the prompt!

[activpop]

I am always amazed at the wealth of info to be found here. The amount of detail that is written about some little part or connection on a Sport is impressive. I'm on it now, time to order parts. Thank you all!

[activpop]

Parts ordered. MG Cycle to the rescue.

[activpop]

Well that was easy, $1.40 washer and no more drips. Simple pleasures!

[docc]

1 hour ago, activpop said:

Well that was easy, $1.40 washer and no more drips. Simple pleasures!

The "crush" washer(s) at the top where the return line attaches to the frame spine?

[activpop]

2 hours ago, docc said:

The "crush" washer(s) at the top where the return line attaches to the frame spine?

No, the 22mm nut that goes into the rear of the sump. It was dripping out of that area and no sign of oil anywhere beyond it on the flare connection or elbow. After looking at the parts diagram, it was evident where to start. gstallons prompted me to open the book.

What I don't understand is why that line ends into the frame. Does oil make it up there?

[gstallons]

No , it is part of the closed loop ventilation system. I don't like it but I didn't make it. This back hose goes up to the lower portion of the frame and bolts to the side of 

the frame. The front hose that always deteriorates goes into the top portion of the frame goes down and attaches to the engine crankcase area. Look at your parts manual for a good understanding .

Edited 22 hours ago by gstallons

[activpop]

Thanks @gstallons Will there be a test in the morning? 

Seriously though, most crankcase vents I am familiar with are venting air, and are situated at the top of the crankcase. This one is at the bottom and has oil in it.  Must be an Italian design.

I will look at the parts book when I get back to the shop. Maybe then I will understand the process. 

[audiomick]

1 hour ago, activpop said:

 This one is at the bottom and has oil in it. ..

As far as I understand it, that is the return that brings the re-condensed oil out of the frame back to the motor. The one that connects to the frame up near the steering head brings the vapours out of the crankcase into the frame.

Please correct me if I am wrong.

[activpop]

@audiomick, that seems like a wonderful way to introduce water into the crankcase.  Putting the vapors into a steel tube, then draining it back to the crankcase? I can see condensation happening in colder months.