Frontier 2WD L4-2.5L (QR25DE) (2005): Engine, Cooling and Exhaust
Also for this vehicle: Frontier 2WD L4-2.4L (KA24DE) (1998), Frontier 2WD V6-3.3L (VG33E) (2003), Frontier 2WD V6-3.3L SC (VG33ER) (2004), Frontier 2WD V6-4.0L (VQ40DE) (2009), Frontier 4WD V6-3.3L (VG33E) (2003), Frontier 4WD V6-3.3L SC (VG33ER) (2004), Frontier 4WD V6-4.0L (VQ40) (2005), Frontier 4WD V6-4.0L (VQ40DE) (2006), Frontier SC Crew Cab 2WD V6-3.3L SC (VG33ER) (2002), Frontier SC Crew Cab 4WD V6-3.3L SC (VG33ER) (2001), Frontier SC King Cab 2WD V6-3.3L SC (VG33ER) (2002), Frontier SC King Cab 4WD V6-3.3L SC (VG33ER) (2001), Frontier SE Crew Cab 2WD V6-3.3L (VG33E) (2002), Frontier SE Crew Cab 4WD V6-3.3L (VG33E) (2000), Frontier SE King Cab 2WD V6-3.3L (VG33E) (2002), Frontier SE King Cab 4WD L4-2.4L (KA24DE) (1998), Frontier SE King Cab 4WD V6-3.3L (VG33E) (1999), Frontier XE 4WD L4-2.4L (KA24DE) (1998), Frontier XE Crew Cab 2WD V6-3.3L (VG33E) (2000), Frontier XE King Cab 2WD L4-2.4L (KA24DE) (2000), Frontier XE King Cab 2WD V6-3.3L (VG33E) (2001), Frontier XE King Cab 4WD L4-2.4L (KA24DE) (1998), Frontier XE King Cab 4WD V6-3.3L (VG33E) (2002).
Diagnostics
Maintenance
Engine
Transmission
Brakes
Electrical
Steering & suspension
Heating & A/C
Body & interior
Choose Sections to see everything in a chapter, or a chapter title to start at its first page.
Engine293 pages
Actuators and Solenoids - Engine41 pages
- Compression Check › System Information › Specifications23
Camshaft, Lifters and Push Rods20 pages
- Camshaft Bearing › Component Information › Specifications
- Camshaft, Engine › Component Information › Specifications234567891011121314151617
- Lifter / Lash Adjuster, Valve › Component Information › Specifications
- Variable Valve Timing Actuator › Component Information › Technical Service Bulletins › Engine Controls - MIL ON/Multiple VVT DTC's Set
Cylinder Block Assembly35 pages
Balance Shaft › Component Information › Technical Service Bulletins2 pages
- Connecting Rod Bearing › Component Information › Specifications › Connecting Rod Big End Diameter2345678
- Connecting Rod, Engine › Component Information › Specifications › Connecting Rod Side Clearance234
- Crankshaft Main Bearing › Component Information › Specifications › Main Bearing Cap234567
- Crankshaft, Engine › Component Information › Specifications › Crankshaft End Play2345678
- Harmonic Balancer - Crankshaft Pulley › Component Information › Specifications
- Piston, Engine › Component Information › Specifications › Piston to Piston Pin Oil Clearance234
- Piston Ring, Engine › Component Information › Specifications
Cylinder Head Assembly13 pages
- Valve Clearance › System Information › Specifications2345
- Fuel Pressure Release › System Information › Service and Repair
- Valve Cover › Component Information › Service and Repair2
- Valve Guide › Component Information › Specifications
- Valve Seat › Component Information › Specifications
- Valve Spring › Component Information › Specifications
- Valve, Intake/Exhaust › Component Information › Specifications › Valve Timing2
Drive Belts, Mounts, Brackets and Accessories29 pages
Drive Belt › Component Information › Technical Service Bulletins20 pages
- Customer Interest: › 09-007 › Jan › 09 › Engine - Noise From The Drive Belt234
All Technical Service Bulletins for Drive Belt:10 pages
- All Other Service Bulletins for Drive Belt: › 10-002 › Jan › 10 › Engine - Drive Belt Noise Diagnosis23456
Drive Belt Tensioner › Component Information › Technical Service Bulletins8 pages
- Engine Mount › Component Information › Service and Repair
Engine Lubrication18 pages
- Engine Oil Pressure › Component Information › Specifications2
- Engine Oil Drain Plug › Component Information › Specifications
Engine Oil › Component Information3 pages
- Oil Cooler, Engine › Component Information › Service and Repair2
- Oil Filter, Engine › Component Information › Service and Repair
- Oil Pan, Engine › Component Information › Specifications234
- Oil Pressure Gauge › Component Information › Description and Operation
- Oil Pressure Sender › Component Information › Locations2
- Oil Pump, Engine › Engine Oil Pressure › Component Information › Specifications2
- Intake Manifold › Component Information › Specifications234
- Lamps and Indicators - Engine › Oil Pressure Gauge › Component Information › Description and Operation
Seals and Gaskets, Engine7 pages
- Crankshaft Main Bearing Seal › Component Information › Service and Repair
Exhaust Manifold Gasket › Component Information › Technical Service Bulletins4 pages
- Front Crankshaft Seal › Component Information › Service and Repair
- Valve Guide Seal › Component Information › Service and Repair
- Sensors and Switches - Engine › Oil Pressure Sender › Component Information › Locations2
Timing Components55 pages
Balance Shaft › Component Information › Technical Service Bulletins2 pages
- Timing Chain › Component Information › Service and Repair2345678910
- Timing Chain Tensioner › Component Information › Specifications
- Timing Component Alignment Marks › Component Information › Locations
Variable Valve Timing41 pages
Tune-up and Engine Performance Checks62 pages
- Fuel Pressure › System Information › Specifications234
- Air/Fuel Mixture › System Information › Adjustments23456789101112
Idle Speed › System Information30 pages
Technical Service Bulletins15 pages
- All Technical Service Bulletins for Idle Speed: › 05-067 › Oct › 05 › Engine Controls - Engine Idle Speed 25RPM Too High2345
- By Symptom for Idle Speed: › 05-067 › Oct › 05 › Engine Controls - Engine Idle Speed 25RPM Too High2345
- Customer Interest for Idle Speed: › 05-067 › Oct › 05 › Engine Controls - Engine Idle Speed 25RPM Too High2345
- Adjustments › Perform If Idle Is Out of Specification23456789101112131415
- Air Cleaner Housing › Component Information › Service and Repair
- Fuel Filter › Fuel Pressure Release › System Information › Service and Repair
- Firing Order › Component Information › Specifications
- Ignition Timing › Number One Cylinder › Component Information › Locations
- Spark Plug › Component Information › Specifications234
- Compression Check › System Information › Specifications23
- Valve Clearance › System Information › Specifications2345
- Water Pump › Component Information › Specifications23
Cooling System98 pages
- Coolant › Component Information › Specifications › Capacity Specifications2
- Coolant Line/Hose › Component Information › Service and Repair
- Radiator Cooling Fan › Radiator Cooling Fan Motor Relay › Component Information › Locations
- Heater Core › Component Information › Service and Repair
- Radiator › Component Information › Service and Repair23
- Relays and Modules - Cooling System › Radiator Cooling Fan Motor Relay › Component Information › Locations
Thermostat, Engine Cooling › Component Information4 pages
- Water Pump › Component Information › Specifications23
Exhaust System40 pages
Catalytic Converter › Component Information18 pages
Exhaust Manifold › Component Information6 pages
Heat Shield, Exhaust › Component Information › Technical Service Bulletins12 pages
Seals and Gaskets, Exhaust › Exhaust Manifold Gasket › Component Information › Technical Service Bulletins4 pages