Using this oil temperature sensor adapter is easy. First, locate the M18 port on top of your EJ engine. Then, attach the adapter to the port. After that, you can connect your aftermarket temperature sensor with 1/8NPT threads. Before making a purchase, always double - check if the adapter is compatible with your engine. When installing, be aware that you may need to make some small changes for it to fit properly. For maintenance, keep the adapter clean and dry. If you notice any signs of wear or damage, it's a good idea to replace it to ensure accurate temperature readings.