Ok, so I changed this lovely little device out on my 96 with a 318. Total PIA!. First they stuck the thing back there by the rotor. Second, they stuck it back there by the rotor. For those of you with the v-8 you'll know exactly what I mean. Ok so what is the indication that yours may be failing? At low RPM a sudden drop to no oil pressure accompanied by the "check gauges" chime. How do you know it's not really on oil pressure problem? No valve clatter. Since the 318 has hydraulic lifters, 0 oil pressure would result in caltter as pressure decreased to 0. You can double check with a mechanical oil pressure guage that you can borrow from AZ or Advance. So I bought mine and went to replace it. You need a very, very deep well 1 1/16 socket and the ability to find a hole blind. You cannot see the hole where this thing goes and it must be done completely by brail. Replaced it and viola! The oil pressure is in the normal range an no more drops to no oil pressure.
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