Timing Chain Kit and Oil Pump for 2002-2006 Nissan Altima & Sentra (QR25DE 2.5L DOHC) — (Fits: Nissan)

The oil pump for the Nissan QR25DE engine (typically integrated into the front timing cover) utilizes a standard inner-and-outer rotor design. When servicing this oil pump or installing a timing chain kit, you must use a feeler gauge to measure specific internal clearances to ensure proper oil pressure.

Description

Pump body-to-outer rotor clearance: 0.114 – 0.179 mm (0.0045 – 0.0070 in); Rotor tip clearance (inner rotor-to-outer rotor): Less than 0.220 mm (0.0087 in); Pump body-to-rotor radial clearance: 0.035 – 0.070 mm (0.0014 – 0

Engine Oil and Oil Pressure Specifications
Oil Capacity: 4.2 to 4.9 quarts (depending on vehicle model and filter size).
Idle Oil Pressure: Approximately 14 psi (at operating temperature)..0028 in).