Socket size to remove oil pressure switch?

[allenzachary]

I found your forum after searching for information on fixing my wife's 98 Altima 2.4. I'm not really a carhead; simply a guy with a bunch of tools and only a little money, so I try to fix and maintain our cars myself.

Today, while struggling to remove an especially stubborn oil filter, I managed to break off the retaining clips on the Altima's oil pressure switch. No big deal...$6.99 for an aftermarket switch at the local Auto Zone. Except the removal of the factory switch is giving me fits...or non-fits, so to speak.

I tried a 22mm socket to remove the old switch. I appeared a wee bit small, so I ran to the store and bought a 23 and 24 mm just to be sure. Oddly both the 23 and 24 also are a smidge small. It seems as if all three sizes were just 1 millimeter off...just plain weird. I can't get a visual as I'm on a dolly under the car and the switch is mostly blocked by the CV shaft. I'm at a loss.

Can anyone give me insight as to what size socket is required to remove the factory oil pressure switch? Is it even a socket at all?

Thanks in advance for your help. No snickering, please. Aw, heck, if you give me the right answer you can snicker all you want.

allenzacharyforum newbie
Modified by allenzachary at 10:11 PM 1/3/2009