[dvnr] advise needed oil leak
bsafr at aol.com
bsafr at aol.com
Wed Mar 25 18:57:56 EDT 2020
I was wondering if Frank was gonna check in.
-----Original Message-----
From: Frank Mohr via DVNR <dvnr at casano.com>
To: William F. Dudley Jr. <dud at casano.com>
Cc: DVNR <dvnr at casano.com>
Sent: Wed, Mar 25, 2020 6:55 pm
Subject: Re: [dvnr] advise needed oil leak
Could use both sealers however you still need the grunt. If you have a older style impact driver the kind you hit with a hammer I’d use that.
Sent from my iPhone
> On Mar 25, 2020, at 5:44 PM, William F. Dudley Jr. via DVNR <dvnr at casano.com> wrote:
>
> Dan et al,
>
> Dan's measurements and my crude measurement technique (working on
> the motor IN THE BIKE) were sufficient to get my pilot drill
> close, and then by some drill bit abuse I was eventually able
> to drill a .400 hole right over the leaky screw. See attached
> picture.
>
> I have successfully removed the screw (it was "tight-ish", but
> certainly no struggle to remove).
>
> To re-assemble:
>
> 1. should I put lock-tite on the threads (after cleaning screw
> and hole with brake cleaner) ?
>
> 2. should I put Yamabond on the shank of the screw near the head?
>
> 3. what torque should I apply to the screw? Is there a number,
> or is "big grunt with screwdriver" good enough?
>
> Thanks,
> Bill Dudley
>
>> On 3/25/20 3:53 PM, Daniel Sellers wrote:
>> OK Mr Dudley
>> The dimensions for the screw hole on an 850 Commando that pertain to your dimension "X" and "Y" are:
>> X = 1.885"
>> Y= 2.44"
>> Mind you I am measuring from two different planes but dimensions are taken from one plane. I compared the dimensions to a 750 Atlas and they are the same.
>> Good Luck with the oil leak.
>> Cheerio
>> dan
>> On Wed, Mar 25, 2020 at 2:34 PM Daniel Sellers <dansellers45 at gmail.com <mailto:dansellers45 at gmail.com>> wrote:
>> OK Mr Dudley
>> On Tue, Mar 24, 2020 at 8:22 PM richard casey <saxmanrich at gmail.com
>> <mailto:saxmanrich at gmail.com>> wrote:
>> I second what Mr Sellers has stated.
>> On Tue, Mar 24, 2020 at 7:03 PM Daniel Sellers via DVNR
>> <dvnr at casano.com <mailto: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 <mailto: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
>> > _______________________________________________
>> > DVNR mailing list
>> > DVNR at casano.com <mailto:DVNR at casano.com>
>> > https://mailman.dudley.nu/mailman/listinfo/dvnr
>> > UNSUBSCRIBE: mail to DVNR-unsubscribe at casano.com
>> <mailto:DVNR-unsubscribe at casano.com>
>> >
>> _______________________________________________
>> DVNR mailing list
>> DVNR at casano.com <mailto:DVNR at casano.com>
>> https://mailman.dudley.nu/mailman/listinfo/dvnr
>> UNSUBSCRIBE: mail to DVNR-unsubscribe at casano.com
>> <mailto:DVNR-unsubscribe at casano.com>
> <drilled_engine_mount_1k.jpg>
> _______________________________________________
> DVNR mailing list
> DVNR at casano.com
> https://mailman.dudley.nu/mailman/listinfo/dvnr
> UNSUBSCRIBE: mail to DVNR-unsubscribe at casano.com
_______________________________________________
DVNR mailing list
DVNR at casano.com
https://mailman.dudley.nu/mailman/listinfo/dvnr
UNSUBSCRIBE: mail to DVNR-unsubscribe at casano.com
More information about the DVNR
mailing list