Variable Flow Oil Pump

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

The variable flow oil pump is attached to the underside of the windage tray with 3 bolts. A solenoid valve in the variable flow oil pump switches to reduce the oil gallery control pressure at lower engine speeds. This reduces the power consumption of the variable flow oil pump and reducing overall fuel consumption. The variable flow oil pump is controlled by the Powertrain Control Module (PCM). The input shaft of the variable flow oil pump is driven from the front of the crankshaft, by the secondary timing chain, at 0.87 engine speed.

The variable flow oil pump draws oil from the oil pan through a centrally mounted pick-up pipe. The oil is pressurized and pumped through an output pipe to the cylinder block. The engine oil is then passing through an anti-drain valve and a plate type oil cooler. The engine oil is filtered by a replaceable filter element, installed on the front of the Bank 1 cylinder head.

The output from the oil filter is distributed through oil galleries in the cylinder heads and the cylinder block. All moving parts are lubricated by pressurized or splash oil. Pressurized oil is also provided for the Variable Camshaft Timing (VCT) system, the piston oil cooling jets and the timing chain lubrication jets.

The oil returns to the oil pan under gravity. Large drain holes through the cylinder heads and the cylinder block are provide the rapid return of the engine oil to the oil pan. System replenishment is through the oil filler cap on the Bank 2 camshaft cover.

The oil evacuation pipe is installed to allow oil to be drawn from the oil pan. The upper end of the oil evacuation pipe is located under the oil filler cap.

The oil drain plug is installed in the right side of the oil pan.

Variable Flow Oil Pump Nominal Operating Pressures