[dvnr] advise needed oil leak

[richard casey]

I second what Mr Sellers has stated.

On Tue, Mar 24, 2020 at 7:03 PM Daniel Sellers via DVNR <dvnr at casano.com>
wrote:

> Bill
> The screw circled in red is one of two machine screws that fasten the left
> and right crankcase halves together independent of the larger bolts that
> fasten the engine to the cradle. The oil is likely leaking from the same
> location and some coming from the crankcase half joint and some getting out
> of the same leak an weeping out the screw hole. Did the bolts mounting the
> engine to the cradle work loose? Good luck sealing a leak externally after
> oil has gotten between the existing seal between the case and sealant. You
> might be able to reduce the leak by tightening the 1/4" machine screw and
> mounting bolts.
>
> These are my thoughts. I'm sure you will have some experts explain it
> better.
>
> Dan Sellers
>
> On Tue, Mar 24, 2020 at 5:47 PM William F. Dudley Jr. via DVNR <
> dvnr at casano.com> wrote:
>
> > Hi,
> >
> > My 71 Commando is weeping oil out of the motor.
> >
> > There are two leaks.  One is the case joint between left and
> > right halves, aft of the oil drain/oil screen.
> >
> > The other one is from the screw around which I have drawn
> > a red circle in the attached photo.
> >
> > I don't want to disassemble the entire motorcycle for these
> > stupid leaks.  I can goober up the case on the seam with some
> > RTV and stop that leak, but the one at the screw is harder,
> > since the screw is hidden behind the engine mounting plate.
> > (I also have some more sophisticated means to seal that leak
> > on the seam.  So I may not end up goobering it up with RTV.)
> >
> > I thought that if I drilled a hole in the engine mounting plate,
> > right over that screw, then I could then sort out that leak
> > one way or another.
> >
> > Questions:
> >
> > 1. what does that screw do?  Does it just plug an oil way after
> > the factory drilled the oil way during manufacturing?
> >
> > 2. Does anyone have a Commando case not mounted in a motorcycle
> > from which they could measure 'X' and 'Y' as shown on my drawing?
> > That will help me locate where to drill.
> >
> > I plan on putting a stainless plate between the engine mounting
> > plate and the crankcase when I drill, so that I don't overshoot
> > and make a mess of the case.
> >
> > Thanks,
> > --
> > Bill Dudley
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