FWIW, I have the same problem. If the adaptor is screwed flush with the
block, there are an inadequate amount of threads to bite into the oil filter.
My solution, inelegant and probably incorrect, is to thread the adaptor only
about half way into the block which re-allocates sufficient "threadage" to
grab the oil filter. I have had no problem with this setup for many 10s of
thousands of miles with both the Fram and AC Delco filters...
Greg Rowe
78 Spitfire
In a message dated 4/16/00 10:22:51 PM EST, danb@thelittlemacshop.com writes:
> >Spitfire guru's
> >
> >A friend of mine has a 78 Spitfire 1500 with the spin on oil filter. A
> >bizarre thing happened, the oil filter popped off. It was found laying in
> >the engine bay off to the side. It looked normal and the threaded pipe
> >unto which it screws looked normal. When I tried to reinstall it it
> >appeared that the filter gasket contacts the seating surface before the
> >thread is engaged. As if the threaded pipe is too short. The last ones
to
> >change the oil (a service station) must have had it on by one thread at
> >best. Typically these filters require 5 or 6 turns before the gasket
> >contacts the seating surface.
> >
> >Has anyone words of wisdom about this. Is there a particular filter that
> >is necessary for this application that has a more convex shape to it?
> >
> >Help me. Help me.
> >
> >Dave Massey
>
> Hi Dave --
>
> Well, it may simply be the wrong type of filter for the car. Are the
> threads in the filter recessed? My Spit filter has the threads up
> very close to the gasket surface.
>
> For late Spits like ours, I believe there were two kinds of filters
> used, depending on which thread adapter you had. The two were AC
> PF13 and AC PF53 (or obviously any of a number of other brands; you
> can look them up in a cross-reference catalog at any auto store).
>
> I'm curious what you mean by "threaded pipe". My Spit has an adapter
> that you thread into the engine block; there's a hex portion in the
> middle that allows you to tighten/loosen it, and then a threaded
> portion (different threads than what goes into the block) which mates
> with the oil filter. Does this sound like what your friend has?
>
> Hope this helps.
>
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