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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Mechanical - 4.4L - Introduction) >> Description and Operation >> Engine Component Description >> Lubrication System

Lubrication System

WARNING: This page is about a different variant/trim than selected.
NOTE: This engine uses a special high performance oil filter. Use of any other filter may lead to filter failure and/or severe engine damage.

The oil pump has increased output from other Northstar engines. The additional output is needed to supply the volume needed for the oil jets required to cool the pistons. An oil gallery, specific the LC3, is used to supply oil to the oil jets. A new oil filter is also required to meet the additional volume that needs to flow from the oil pump. The new oil filter incorporates a bypass valve and a specific filtering media for improved protection along with lower pressure drop through the oil filter. Supercharged Northstar engines oil filter adapters and oil filters utilize special thread size and pitch. The oil filter adapter does not contain the bypass valve.

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