In the process of stamping out all possible hinds of oil residue from my car, I noticed when I had my muffler and heatshield off that the oil pressure switch (on the driver's side -- not the one by the oil filter) is also wet and so I think I'll replace it as well. I'm a bit puzzled about the proper sized wrench for the sensor. 22mm is too small, and 24mm is too loose (I'm not pulling on a loose fitting wrench and rounding the fastener off). According to my calipers, 23mm should be just right, but a 23mm wrench is not a standard tool. Convering to standard (in case it's some trowback) gives me 29/32 which is also far from a standard tool size. What is the proper tool size to wrench the oil sender with? Is it indeed some special-order 23mm odd-ball? Knut To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/