Posted by Nick Jones on 11/19/2007, 2:47 pm, in reply to "Re: spin-on filter adapter"
80.229.165.96
The reason for the variability is that that dimension did not matter at all to the original Triumph arrangement, so machining tolerances were rather er, open.
I heard (but have not seen) that the current versions of this adaptor uses a proper sprung inner seal that can cope with the wide tolerances, but welcome the reminder of the blutack trick as after 19 years I probably ought to fit a new seal and was wondering how to work out the correct size!
Finally, before fitting the outer seal groove must be very carefully checked - there is often one more seal in there than you thought there was....
Nick
--Previous Message--
: The original filter used not an O-ring,
: but a square section rign to sit in the
: groove cut in the block. The filter
: inside sealed around the inner oil
: outlet by a wide fibre washer that was
: part of a new filter.
:
: Adaptors use an O-ring in pace of that
: washer. The Mocal adaptor comes with
: the strange instructions to use a piece
: of BluTac (suuplied)as a depth gauge.
: Trial fit the adaptor with the square
: of BluTac where the O-ring will go and
: then choose from a thick or thin O-ring
: (supplied). Why this variability
: existed, I don't know.
:
: Also, on most Mocal adaptors the
: position of the O-ring groove is
: marginally overlappeing the edge of the
: face that it should seat on. I'm sure
: that I fitted it at least once and had
: no or very litle oil filtering, as all
: the oil bypassed the filter, AND the
: cooler!
:
: JOhn
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