- 1). Turn the engine off and allow it to cool down. Open the hood and locate the oil pressure switch. The location of the switch is different for every vehicle, however, it is usually located along one side of the engine block. Clean around the switch with a shop rag to remove oil and grit.
- 2). Disconnect the wiring harness plug from the oil pressure switch.
- 3). The oil pressure switch is screwed into the engine block. Turn the oil pressure switch counterclockwise with a wrench, then unscrew it all the way to remove it.
- 4). The new pressure switch may have thread sealant on its threads. If it does not, apply some automotive thread sealant to the threads, then screw it into the threaded hole in the engine block. Tighten the switch according to the manufacturer's specifications. The threads are NPT (National Pipe Thread) standard and are tapered, so it is easy to over-tighten if you are not careful.
- 5). Connect the wiring harness plug into the new switch. Make sure the plug seats all the way and clicks into position.
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