Nissan Skyline R33 Engine Service Manual (1993–1998)

This English-language Nissan Skyline R33 engine service manual covers the 1993–1998 R33 series and the RB20E, RB25DE, RB25DET, and RB26DETT engines, including standard and N1 GT-R applications. JPNZ reconstructed the Japanese manual in English and adapted some material for different driving conditions.

PDF Navigation and Page Count

Finding information in the PDF. Use the printed contents and index to locate sections. The PDF has no text search or embedded bookmarks. Small connector and pin labels in the engine wiring diagrams need magnification, and the final index page is upside down.

The RAR download contains one printable English PDF with 491 pages. It includes General Information (18 pages), Engine (450), Service Data (11), Specifications (6), and the Index (4). The cover and publisher’s notice account for the remaining two pages and are included in the total.

Engine Repair, Turbocharger Service, and ECCS Diagnostics

These are selected topics from the manual. It also covers auxiliary-belt tension and the RB25DE dual-mode muffler where fitted.

• Engine removal and overhaul procedures cover removal and installation for the listed engines, with cylinder-head and internal engine overhaul for the RB26DETT.
• Timing and valve train procedures cover timing-belt replacement, camshaft inspection, hydraulic lifter checks, and RB26DETT shim selection.
• Turbochargers and intake sections cover turbocharger removal and inspection, intercooler and recirculation-valve checks, and RB26DETT throttle-linkage adjustment.
• Fuel and ignition checks cover fuel pressure, injector and fuel-pump circuits, ignition coils, and power transistors, with procedures organized by engine.
• ECCS diagnosis includes symptom charts, self-diagnosis, CONSULT data monitoring and active tests, wiring diagrams, and control-unit pin layouts.
• Cooling and lubrication procedures cover water pumps, thermostats, radiators, coolant bleeding, oil pumps, and oil-pressure checks.
• Selected brake service covers master cylinders, calipers, and disc inspection, along with brake-fluid replacement and bleeding.

The measurement procedures and CONSULT and oscilloscope tests are suited to mechanics experienced in engine repair and electrical fault tracing.

Engine Overhaul and Valve Timing

The RB26DETT section covers cylinder-head disassembly, valve-guide and seat inspection, and piston, connecting-rod, and crankshaft measurement. Main- and connecting-rod-bearing charts match component grades to bearing sizes, helping identify suitable replacement bearings during overhaul.

Valve-train procedures distinguish the hydraulic lifters in the RB20E and RB25 engines from the adjustment shims in the RB26DETT. The RB25 camshaft procedure warns that a pulley holder can damage the internal mechanism of the intake camshaft timing pulley.

Turbochargers, Intake, and Fuel Delivery

Air-cleaner and intake-duct service extends through injector removal and fuel-system checks. RB26DETT illustrations show throttle-linkage adjustment and the different vacuum-hose routing for standard and N1 configurations.

The RB25DET fault chart links oil leakage, exhaust smoke, noise, and poor power to possible turbocharger faults. The turbo sections cover removal, external inspection, and wastegate actuator checks. The turbocharger body is serviced as an assembly, and the actuator test notes identify excessive test pressure as a cause of diaphragm damage.

ECCS Diagnosis and Engine Wiring

Engine-specific wiring diagrams, control-unit pin layouts, and input/output signal charts support checks for power, ground, and harness continuity before replacing a sensor or control unit. The fault charts cover hard starting, unstable idle, hesitation, and stalling. RB26DETT tests also cover both airflow meters, the fuel-pump control modulator, and the boost-control solenoid.

Electrical coverage centers on engine management, including selected automatic-transmission signals on the RB25 engines. For body wiring, transmission overhaul, or chassis overhaul, use the corresponding service manual.

Oil Coolers and Brake Assemblies

Oil-cooler procedures distinguish the standard RB26DETT water-cooled unit from the N1 air-cooled installation. The GT-R brake pages include exploded views of the OPB27V front and OPB13V rear calipers.

Always review the manual’s safety precautions regarding heavy lifting and fluid handling before starting any engine work.

Valve Clearance and Turbo Shaft Play Examples

For RB26DETT shim selection, the cold valve-clearance standards are 0.42–0.48 mm on the intake side and 0.35–0.41 mm on the exhaust side. The manual gives hot clearances separately for reference.

The RB25DET turbocharger inspection gives a standard axial rotor-shaft end play of 0.120–0.200 mm for the dial-indicator check.