Nissan 240sx S13 Engine Performance Removal, Overhaul and Installation
Nissan 240sx S13
Removal, overhaul and installation procedures are covered in this article. If component removal and installation is primarily an unbolt and bolt-on procedure, only a torque specification may be furnished.
IGNITION SYSTEM
DISTRIBUTOR
Removal
Align timing mark(s) to piston No. 1 at TDC on compression stroke. Mark rotor position in relation to distributor housing. Disconnect spark plug wires and wiring harness connectors from distributor. Remove distributor hold-down bolt(s). Remove distributor.
Installation
1. To install, reverse removal procedure. Ensure mark(s) or indentations on distributor shaft and housing are aligned. Check distributor rubber "O" ring seal and replace as necessary.
2. After installing distributor, ensure distributor rotor is aligned with mark made during removal or set at cylinder No. 1 spark plug position. Check and adjust timing. Tighten distributor hold-down bolt to specification.
CRANKSHAFT POSITION SENSOR
NOTE: Crankshaft position sensor is located inside the distributor.
FUEL SYSTEM
WARNING: Always relieve fuel pressure before disconnecting any fuel injectionrelated component. DO NOT allow fuel to contact engine or electrical components.
FUEL SYSTEM PRESSURE RELEASE
1. Remove fuel pump fuse.
2. Start engine and allow to run until fuel is exhausted and engine stalls. Crank engine an additional 2 or 3 times to verify all pressure has dissipated. Turn ignition off. Install fuel pump fuse or relay.
FUEL PUMP REMOVAL AND INSTALLATION
NOTE: Fuel pump is located in fuel tank. If vehicle is not equipped with a maintenance access cover for fuel pump service, remove fuel tank.
Release fuel pressure. Disconnect negative battery cable. Remove maintenance access cover. On models without a maintenance access cover, remove fuel tank. Disconnect fuel lines and wiring harness connector. Remove fuel pump mounting bolts. Remove fuel pump from fuel tank. To install, reverse removal procedure.
FUEL RAILS AND INJECTORS
Removal
Release fuel pressure. Disconnect negative battery cable. Remove EGR backpressure transducer valve (Pickup). Disconnect fuel inlet and return lines. Remove fuel rail retaining bolts. Remove fuel rail and injectors as an assembly. Remove injectors from fuel rail.
Installation
Clean injector exterior. Install NEW "O" rings on injectors. Install injectors and fuel rail. Install EGR backpressure transducer valve. Pressurize fuel system and check for leaks.
OXYGEN (O2) SENSOR REMOVAL AND INSTALLATION
1. The O2 sensor is mounted in exhaust pipe, below exhaust header. O2 sensor is equipped with a permanent pigtail which must be protected from damage when removing sensor.
2. Sensor may be difficult to remove when engine temperature is less than 120°F (49°C). Ensure sensor is free of contaminants; avoid using cleaning solvents of any type. Always use anti-seize compound on threads before installing. Tighten sensor to 30 ft. lbs. (41 N.m).
TORQUE SPECIFICATIONS
- Distributor Hold-Down Bolt: 10-13 (14-18) Ft. Lbs. (N.m)
- Fuel Rail Bolt: 16-19 (22-26) Ft. Lbs. (N.m)
- Oxygen Sensor: 30 (41) Ft. Lbs. (N.m)
- Distributor Hold-Down Bolt: 84-108 (9.4-12.2) INCH Lbs. (N.m)
- Fuel Injector Holder Screw: 20-24 (2.2-2.7) INCH Lbs. (N.m)
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Nissan 240sx S13
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