Doug,
i want to do the same thing,
only my probe block would attach(intake) to the original hole in the
block that the
original probe went into,
than i want to make an outlet, line to somewhere,
hence the question,
of tapping into the termostat cover or the hose going into my intake,
this i thought would give me a more accurate reading ov my block/water
temp,
johnp

Mike,
my original sensor is only 1/4 wide, screwing into  the block,
tiny,,,grrr,
the machanical sensor is 1/2 inch,
the probe wont even get into the block,
,
and yes on the airlock, thats why i wanted to put in a return line,
to keep the water flowing over the sensor,
i have a drawing of the block im thinking of making if you want a peek,
,
otherwise i have made up a raidiator hose adaptor for it already,
but wanted to keep it closer to the rear of the block, as im assuming
the temp reading would be more accurate.
,
johnp
,

hey Mike, I see all kinds of gauges for cj's.  Know of any for YJ's  Mine's
an 89.  I'm not sure on the brand I need.....  I am aware that all of these
jeeps seem to have gauge problems.  I'm new at this, but it seems that it's
weather related (Moisture).  I plan on replacing some, and putting them in
the stock position, but I'm planning on adding others  (OIL) because the
stock gauges have made me paranoid.  But the best one I did so far, was
remove the cl0ck and replace it with a vacuum gauge....attached it to the
intake....  wanted to do the brake line, but didn't want to add another
potential leak point.  anyway, for the dirty ditch dawg, I don't believe
that that small a line would effect the water/temp situation unless you
were low on water.  Usually those radiators are oversized.  I had mine flow
tested.  The guys say it will cool a chevy 350.  The thermostat will flow
water accordingly.  Like when you remove the thermostat, you can't get the
motor to run at normal temp, always runs cool?  Plenty of flow.  A 1/4 inch
line is like PI_Sing in the wind.....
good luck
Robb-Seattle WA