Piston with Piston Rings for 2002–2006 Nissan Altima / Sentra 2.5L QR25DE
The Nissan QR25DE piston assembly typically features a standard bore of 89.0 mm, a stroke of 100.0 mm, and a compression height of 32.0 mm, designed specifically for the 2.5-liter inline-four engine. Its compression ratio ranges from 9.5:1 to 10.5:1. Constructed from ZL109 aluminum alloy, the assembly is equipped with a 20 mm full-floating piston pin and utilizes a three-ring piston set, with the clearance between the piston skirt and the cylinder wall maintained within a range of 0.03 to 0.05 mm.
Description
Key Specifications (OEM & Common Upgrade Options) —
Bore: 89.0 mm (Standard); 89.5 mm / 90.0 mm (Oversize options available).
Stroke: 100.0 mm.
Compression Height: 32.0 mm.
Piston Material: ZL109 Aluminum Alloy.
Compression Ratio: 9.5:1 to 10.5:1; up to 11.5:1+ (High-performance kits).
Piston Pin Diameter: 20 mm (Full-floating design with circlips).
Piston Ring Configuration: 3-Ring Set (2 Compression Rings, 1 Oil Ring).
OE Number: A2010-JG300
