knowing when to replace the UIM
I have an 1996 SE with 241,000 miles on it. I've read all the forums on the UIM issue. I haven't had a chance to really clean off the engine but I can see a coolant leak around the LIM. My question is that my UIM has a date stamp of February 8, 2002. Should I replace this one with the APN unit or how could I tell if this is the Dorman unit? I plan to do the regular maintenance for economy (filters, plugs, wires, posn1 o2 sensor, 180 thermo, clean TB, the Dex is gone, only running green glycol etc.) and didn't want to do too much at once if I didn't need to. The car runs great. I haven't drained the oil yet to see if there is coolant in it. Also, if I do replace the LIM, UIM, etc. how much time should I allow? Two full days?