EJCP.PARTS

NISSAN 2.5 QR25DE

The QR25DE is a 2.5 L (2488 cc) variant built with cast steel connecting rods, a steel timing chain, counter-rotating balance shafts, and an aluminum intake manifold. The engine bore is 89 mm with a stroke of 100 mm and a compression ratio ranging from 9.5:1 to 10.5:1 depending on the vehicle.[1] Output is rated 175 hp (130 kW) at 6000 rpm with 180 lb·ft (244 N·m) of torque at 4000 rpm in the Altima 2.5 and Sentra SE-R models. Altimas that are PZEV compliant create 170 hp (130 kW) and 175 lb·ft (237 N·m) of torque.[3] In the 2005+ Nissan Frontier the QR25DE generates 152 hp (113 kW) and 171 lb·ft (232 N·m) of torque The revised QR25DE found in the 2007+ Sentra, Altima, Rogue, etc. has a number of improvements over the older QR25DE. These include: A simpler, larger diameter single path resin intake manifold replaced the old dual path design. (Note: California emissions models do have a swirl control valve located in the intake) Revised piston crown shape to support a higher compression ratio of 9.6:1.(10.5:1 in Sentra SE-R Spec V.) The balancer system has been moved back slightly from the crank pulley to a more central location in the block. Revised cam shaft profile. Reinforced connecting rods. Reduced friction likely through Nissan's extensive use of coatings on pistons, journal bearings, etc. Additional engine mount on the top of the motor, pulley side. Higher rev limit and improved power output.[WIKI]

SIZES BLOCK MATERIAL HEAD MATERIAL CAM TYPE FUEL SYSTEM
2.5 ALUMINUM ALUMINUM DOHC MPFI

ITEMS

BRACKETS EXHAUST MANIFOLD INTAKE MANIFOLD OIL PAN PISTON
SENSORS TIMING COVER TIMING SET VALVE COVER VALVE INFORMATION

LISTING TEMPLATES

SIZES COMPATABILITY NOTES
2.5 DOHC 02-06 ALTIMA SENTRA ****
2.5 DOHC 05-08 FRONTIER ****
2.5 DOHC 07-08 SENTRA NOTE CVT OR MANUAL
2.5 DOHC 07-08 ALTIMA ****
2.5 DOHC 08 ROGUE NOTE CALI OR FED
NOTE COOLER
2.5 DOHC 09 ALTIMA NOTE HYBRID OR NOT
NOTE FED OR CALI
2.5 DOHC 09-12 SENTRA ****
2.5 DOHC 09-10 ROGUE CALI EMMISSIONS
NOTE COOLER
2.5 DOHC 09-15 ROGUE W/ OR W/O TOW PACKAGE
MAY BE DEFINED BY OIL COOLER
FED EMMISSIONS
JAPAN BUILT
2.5 DOHC 09-12 EQUATOR
09-16 FRONTIER
****
2.5 DOHC 10-11 ALTIMA HYBRID
2.5 DOHC 10-13 ALTIMA NOTE CALI OR FED
13 IS COUPE ONLY
2.5 DOHC 13-14 ALTIMA SEDAN ONLY
2.5 DOHC 13-14 ALTIMA SEDAN ONLY
2.5 DOHC 14-16 ROGUE US BUILT
2.5 DOHC 15-16 ROGUE KOREA BUILT
2.5 DOHC 15 ALTIMA

VALVE INFORMATION EARLY

MAKE MODEL YEAR RANGE
NISSAN ALTIMA 2002-2006
NISSAN FRONTIER 2005-2014
NISSAN SENTRA 2002-2006
SUZUKI EQUATOR 2009-2012
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST 30.7 6 98.8 1 *NIS25AU
INTAKE 35.6 6 97.2 1 *NIS25AU

VALVE INFORMATION REDESIGN

MAKE MODEL YEAR RANGE
NISSAN ALTIMA 2007-2012
NISSAN ROUGE 2008-2013
NISSAN SENTRA 2007-2012
TYPE HEAD DIAMETER STEM DIAMETER O.A.L. GROOVES LOCATION
EXHAUST 30.4 6 97.8 1 *NIS25BU
INTAKE 35.7 6 96.9 1 *NIS25BU

CAMSHAFT/CRANKSHAFT POSITION SENSOR
02-06 ALTIMA
05-12 FRONTIER
02-06 SENTRA

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