Engine Oil Lubrication

Lubrication System Flow Diagram 

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

Engine oil is moved from the oil pan and pressurized by the variable flow oil pump with integral vacuum pump. The output from the variable flow oil pump with integral vacuum pump passes through oil drilling to be filtered through the oil filter. The output from the oil filter is distributed through oil drilling in the cylinder heads and the cylinder block.

The engine oil lubricates, cools and actuates various engine components. The engine oil lubricates all the moving parts in the engine by pressurized or splashed engine oil. The engine oil also while in contact with the engine components removes heat. In the oil cooler, the heat from the engine oil transferred to the engine coolant.

Pressurized engine oil is distributed from the variable flow oil pump with integral vacuum pump to the following:

• The oil cooler
• The oil filter
• The crankshaft main bearing (quantity 5)
• The connecting rod large end bearing (quantity 4)
• The intake camshaft
• The exhaust camshaft
• The turbocharger
• The primary timing chain tensioner
• The primary timing chain oil jet
• The secondary timing chain tensioner
• The secondary timing chain oil jet
• The piston cooling oil jet (quantity 4) controlled by the piston cooling oil jet solenoid
• The Variable Camshaft Timing (VCT) actuator (quantity 2)
• Continuously Variable Valve Lift (CVVL) assembly.

The oil returns to the oil pan under gravity. Large drain holes through the cylinder head and the cylinder block make sure that the engine oil returns rapidly to the oil pan. The engine oil is replenished through the oil filler cap on the camshaft cover. An oil drain plug is installed in the side of the oil pan.

Variable flow oil pump 

The pressurized engine oil is fed back to the variable flow oil pump with integral vacuum pump through a drilling in the cylinder block. The variable flow oil pump with integral vacuum pump uses the pressurized engine oil fed back to regulate the oil flow and pressure. The Powertrain Control Module (PCM) uses the oil pressure control solenoid and a map to control the engine oil pressure. The oil pressure control solenoid is located in the variable flow oil pump with integral vacuum pump. The engine oil pressure map uses engine speed and load.