Topic: 77 CB750f - Lower Oil line leak at fitting... new O-rings installed, still leaks

[alacrity]

77 CB750f - Lower Oil line leak at fitting... new O-rings installed, still leaked (less, but ... still).  Did it all again with another set of new o_rings.  same leak.  The one leaking is the one that orients vertically (this would be the feed from the oil tank), slightly to the rear of the other one (the return side is fine and dry).  I've installed fresh 15mm x 2.5mm O-rings and torqued them down, slowly, evenly and the fitting is flat.  There was nothing in or around the compression fitting/entry tube. all looked good and fresh and clean. Bike has under 7k original miles on it!  So... basically... what the heck is going on here?   Should I make a gasket? Try a thicker o-ring? Add Hylomar? Try fire? 

[754]

 Can't hep but thing it's a crack or gouge.
 Or maybe the crimp is no longer sealing..  clean it and watch carefully might be able to dust it wit flour.

[Don R]

Could the bolts be the wrong length and bottoming out before they tighten?

[alacrity]

Could the bolts be the wrong length and bottoming out before they tighten?

It's funny I thought EXACTLY the same thing, so I checked the depth with my caliper - and I have nearly a half inch to spare.  Yet I thought -- maybe the threads are chewed up or ... some reason it hits the torque limit and that isn't letting the bolt seat. So I tried slightly shorter bolts, Same darn thing.

[alacrity]

Yes. the face on the engine side is perfect /smooth and flat, as is the face on the oil line mating side.

It's a nice snug fit... doesn't go in at an angle, but only straight in as it should.  It's leaking from right above and then past the lower of the two bolts... which could just be gravity, or maybe the bolt housing is cracked inside there? ugh.. IDK. 

Can't hep but thing it's a crack or gouge.
 Or maybe the crimp is no longer sealing..  clean it and watch carefully might be able to dust it wit flour.

[Don R]

 As a retired plumber, I always look above the apparent leak for the source. Just happened on a set of cylinder heads on my race car. I saw water around a head stud, the leak is a nearly invisible crack in the metal.

[alacrity]

My grandfather was a plumber.  I should have "channeled" what he taught me, but you reminded me of it. Thank you.

I cleaned all the surfaces and ran the bike. 

Oil is seeping from hose itself, from just above the crimp (the inner or rear hose, gravity fed from the oil tank).   I am gonna get a local hose company to use my fittings and replace the hose with fresh strong crimp clamps.
Mr. Hose is their name, Carson CA.

As a retired plumber, I always look above the apparent leak for the source. Just happened on a set of cylinder heads on my race car. I saw water around a head stud, the leak is a nearly invisible crack in the metal.

[Tracksnblades1]

My grandfather was a plumber.  I should have "channeled" what he taught me, but you reminded me of it. Thank you.

I cleaned all the surfaces and ran the bike. 

Oil is seeping from hose itself, from just above the crimp (the inner or rear hose, gravity fed from the oil tank).   I am gonna get a local hose company to use my fittings and replace the hose with fresh strong crimp clamps.
Mr. Hose is their name, Carson CA.

As a retired plumber, I always look above the apparent leak for the source. Just happened on a set of cylinder heads on my race car. I saw water around a head stud, the leak is a nearly invisible crack in the metal.

Kenny has sets for the F and K models.

As a young guy, while attending CC, I had to help an older plumber. He said all you have to know right now is : male goes in female and sh^t always runs down hill. You'll learn the rest real quick if you make any mistakes....😎

[alacrity]

Kenny?

[Tracksnblades1]

See above, multitasking doesn't flatter me...😩

[Jerry Rxman Griffin aka MuthaF'er]

Kenny?

At CycleX

[Don R]

 Too bad it's not an o ring, easier and cheaper. Glad to be of assistance.