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I assume you mean in a car's engine.
To get the best answer, you need to be more specific.
First, drain the engine's oil.
Second, disconnect the electrical connector from the sending unit. (usually one small wire with a push on/pull off connector)
Third, use a socket which fits over the (usually six) flat sides of the sending unit.
This may be a standard socket, OR,
You may need a special socket to remove the sending unit. You may be able to loan out the tool needed from AutoZone or you can buy it from NAPA auto parts.
Fourth, turn the tool counter-clockwise.
Installation is the reverse of removal.
What else can I help you with?
Where is the oil sending unit on a 2000 Pontiac Bonneville and how to replace it?
where is the oil sending unit on my 2000 bonnieville
How do you replace sending unit 1994 Chevy 1500 5.7?
We need to know which sending unit you speak of. There are several on that vehicle such as temperature sending unit, oil pressure sending unit and fuel gauge sending unit.
How do you test your oil pressure?
Remove oil sending unit and replace with a mechanical gauge
Why is your oil gauge working intermitently on your Chevy avelanche?
Bad connection at wireing connector at the oil sending unit. Bad sending unit. Replace as needed.
How do you replace an oil sending sensor on a 96 Mercury Villager where is it?
The oil pressure sending unit is located right above the oil filter.
How do you replace an oil sending unit on a 94 Chevy Cavalier Z-24?
you have to remove the oil pan and replace the pump
How do you replace the Oil Level Sending Unit on a Malibu?
The sensor screws into the side of the oil pan. You will need to drain the oil and then replace the sensor.
How do you replace Oil pressure sending unit?
The oil pressure sending unit is removed by disconnecting the wiring harness and unscrewing the unit using a wrench. The hole is then wiped clean, a new unit installed, and the wires reattached.
Where is the Oil Pressure Sending Unit located on a 1990 Ford F-150 with a 302 motor?
The oil pressure sending unit on a 302 ford is located on the block of the engine. It screws into the block and the sending unit goes on the end. The oil pressure sending unit on a 302 Ford is slightly above and to the left of the oil filter. I find it is easier to replace with the oil filter out.
How do you Check oil pressure 1999 grand prix?
Replace oil sending unit with a manual gauge
1998 Daewoo Leganza with the oil light staying on although there is plenty of oil in the engine?
Probably you need to replace the oil pressure sending unit. It is located on the engine down close to the oil pan. If the sending unit is leaking oil then replace it by all means. Doubtful that the oil pump is defective.
Would the oil pressure sending switch leak oil and then stop?
It developed an leak and then for whatever reason sealed itself. Replace the oil pressure sending unit.
