Subject: Re: those pesky little o rings
Author: Patrick Hayes
Date: Mar 26, 2001, 9:33 PM
Post ID: 1706052512
In a message dated 03/26/2001 6:24:43 PM Pacific Standard Time,
haw-@frontiernet.net writes:
<< One more thing. The big sized bolt that screws in at the 12 o'clock
position on the head; this has an o-ring around its shank. Should this
o-ring be replaced also?? >>
Huh? The 12 oclock stud should have a standard, small o-ring below the
cylinder. Nothing above but a washer and a special Allen headed nut for the
stud. Perhaps this stud had a leak earlier and the previous owner stuck an
o-ring up there?? Perhaps this was unique to the very early motor you have??
(I don't think so.) The only extra o-ring is a big one about 1" in diameter
used as a seal for the big plug in the head which provides access to the 12
oclock stud. Are you talking about this 12 oclock stud access cover plug?
The early engines used an aluminum crush washer here as a seal. About 1974
or so, Guzzi modified this access plug with a recess to accept a big o-ring.
I doubt you have access such cover plugs, but they can be retrofitted and
perhaps you do. If so, this 0-ring should be replaced almost every time it
is disturbed because it deforms due to head heat.
Patrick Hayes
Fremont CA
EV, EV, SPII, V-65-C, Monza, SuperAlce
MGNOC L-403