The Pickup Tube

• In most applications, the oil pump is found inside and above the oil pan and is actuated by gears either on the end of the distributor or the crankshaft. As the engine spins, the gears in the oil pump rotate and cause the pump to cycle oil. The pickup is a tube located on the end of the pump itself that dips into the oil pan. Once the gears are spinning, the pump operates much like a vacuum and picks up the oil from the pan to distribute it throughout the engine block for cooling and lubricating purposes. If the engine is low on oil, the pickup tube will not be able to provide lubrication to the engine due to being above the pool in the pan.
  
  

The Screen Filter

• Automotive oil pumps use a mesh type screen to filter out sludge and other contaminants before they get into the engine and cause harm. As with any other filter type, over time the screen can get clogged, hurting the performance of the pump. Once the screen gets clogged with debris, the oil pump cannot flow as efficiently, which means less oil to the engine of the vehicle. If the screen ever gets completely clogged up, the engine will only survive a minute or two before things start to let go. Therefore, if you are experiencing a low oil pressure situation and cannot find the cause, it is recommended to inspect your oil pump screen and replace if necessary. Regular oil changes can drastically reduce the amount of sludge buildup in the oil.
  
  

Pump Installation

• Before attempting to replace an oil pump, be sure that you know the proper method for the specific year and model of the vehicle. Normally, the use of RTV silicone or other gasket sealants is not recommended because they can get into the pump and prevent the flow of oil. Instead, simply using the o-rings will suffice. If the pump is stubborn and does not want to seat right away, never force it into place with a hammer or other tool. Damage to the oil pump pickup tube or the filter can result in a major mishap down the road. As with the oil filter on the engine, an oil pump should be primed (filled with oil) before installation so that it is never run without lube.