Tom, check and see if your FLAPS has any spark plug "anti foulers"
It's funky little thing that screws into the cylinder (where the spark plug
goes)
and the spark plug screws into it. It's supposed to help keep plugs from
getting fouled so quickly in oil burning engines. Many FLAPS used to
carry them. Anyway, ask for one that fits 18mm spark plugs. The threads on
a O2 sensor are the same as 18mm spark plugs (-:

It's a simple matter to cut the anti fouler in half with a hacksaw and weld
the female threaded part to the exhaust system to accept an O2 sensor.
Ask me how I know. (-:

Steve

--------------
At 05:24 PM 8/28/2004, Tom Young wrote:

>Hi all:
>
>I was unable to rotate my catalytic converter to get the O2 sensor bung
>pointed downward where I could use it as an exhaust snifter port (previous
>thread: "Question for the catalytic converter experts") so now I need to
>actually add a port in the crossover pipe.  None of the auto parts stores
>around here have a weld-on O2 sensor bung (usual reaction when I ask for
>such a thing: uncomprehending blank stare).  So, since I don't really intend
>to put an O2 sensor in this port, what would be wrong with just welding a
>nice big nut on the crossover pipe, and plugging it when not in use with a
>short bolt?  Anything?
>
>TIA.
>---------------------------------------------------------------
>Tom Young                       '81 Vanagon
>Lafayette, CA 94549         '82 Westfalia
>---------------------------------------------------------------