Complete gasket set for 02-06 Nissan Altima Sentra 2.5L QR25DE.

QR25DE complete gasket set for 02-06 Nissan Altima Sentra SE-R 2.5L

A full gasket set for the Nissan QR25DE 2.5L engine (commonly 2002–2006/2007+ Altima, Sentra, X-Trail) typically includes a Multi-Layer Steel (MLS) or graphite cylinder head gasket, valve cover gasket, valve stem seals, and manifold gaskets. These sets are designed for the 2,488cc 16-valve DOHC engine, often featuring an 89mm bore.

Description

Engine: 2.5L 2488cc L4 DOHC 16V (“QR25DE”).
Bore Size: Approximately 89mm.
Material: MLS (Multi-Layer Steel) is common for performance/reliability, requiring high-surface-finish machining.
Fitment Years: Commonly 2002–2006 (Altima/Sentra) or 2007-2012 (depending on the specific kit).
OEM Part Equivalents: 10101-8J085, 10101-AE226

Key components of the complete gasket set (QR25DE):
Cylinder head gasket: Multi-layer steel (MLS) or graphite material.
Valve cover gasket: Usually includes spark plug tube seals.
Intake/exhaust manifold gaskets: Metal or composite material.
Seals and O-rings: Valve stem oil seals (16 pieces), front and rear crankshaft main oil seals, fuel injector O-rings.