Mazda RX-7 Repair Service 1993–1995 Manual (P/N 9999-95-018B-94)

• Document scope: A 1,063-page PDF of the 1994 Mazda RX-7 Workshop Manual for the 13B Turbo, Mazda Part No. 9999-95-018B-94, Form No. 1378-10-93H.
• A June 1995 cooling-fan control revision adds module and relay inspection data for applied VIN *JM1FD333R0300001 and later**.
• Covers 13B engine removal, stand mounting, complete teardown, rotor and housing inspection, seal evaluation, reassembly, installation, and turbocharger service.
• Maps the sequential twin-turbo, fuel, intake, emission, and PCME control systems through on-board diagnostics, monitor functions, symptom charts, and electrical tests.
• Driveline sections handle clutch hydraulics and bleeding, R15M-D manual-transmission overhaul, RB4A-EL automatic-transmission testing and teardown, propeller-shaft service, and torque-sensing LSD setup.
• Chassis coverage includes engine-speed-sensing power steering, conventional and ABS brakes, wheel alignment, and double-wishbone suspension removal, inspection, adjustment, and assembly work.
• Reference material provides system diagrams, circuit and power-flow drawings, exploded views, SST listings, torque data, capacities, pressure tests, wear limits, clearances, and electrical specifications.

This shop-level Mazda repair reference extends from scheduled maintenance to full rotary-engine and automatic-transmission overhaul. It is suited to professional technicians and experienced rotary specialists with proper lifting equipment, pressure gauges, electrical test gear, and Mazda SSTs; maintenance sections remain useful to experienced owners, but the overhaul and electronic-diagnosis chapters assume established workshop skills.

13B Turbo Repair Depth

The engine chapter starts with tune-up and compression diagnosis, then moves through rear oil-seal service, engine removal, stand mounting, disassembly, cleaning, inspection and repair, assembly, and installation. Internal coverage identifies the front, intermediate, and rear housings; rotor housings and rotors; apex, side, corner, and oil seals with their springs; the eccentric shaft; stationary gears; and main and rotor bearings. Technical Data collects runout, end play, bearing clearances, seal limits, housing checks, and component-specific tightening specifications.

Lubrication procedures cover the oil cooler, oil pan, pressure-control valve, metering oil pump, and main oil pump. Maintenance is split between normal and unique operating conditions, with U.S. and Canadian schedules for fluids, filters, plugs, belts, cooling, fuel lines, chassis checks, and driveline oil service. The data preserves an R1-specific engine-oil capacity distinction.

Boost Control, Diagnostics, and Driveline

Fuel and emission work goes well beyond parts replacement. The manual covers PCME inputs and outputs, diagnostic trouble codes, switch monitoring, oxygen- and knock-sensor monitor functions, Quick Diagnosis and relationship charts, and electrical diagnosis support. Sequential twin-turbo service addresses the turbo-control, charge-control, precontrol, and wastegate actuators along with the charge-relief valve, solenoids, vacuum routing, charge-air cooler, throttle body, and intake system. Battery, alternator, ignition-coil, igniter, spark, starter, and interlock testing appear in the engine-electrical chapter.

R15M-D repair covers removal, disassembly, gear and synchronizer inspection, shim and end-play selection, assembly, installation, and shift-mechanism overhaul. The electronically controlled RB4A-EL section adds stall, time-lag, line-pressure, road, self-diagnosis, and manual-operation tests before torque-converter, oil-pump, clutch, brake, servo, parking-mechanism, and control-valve-body work. Rear driveline coverage includes drive shafts and torque-sensing LSD inspection, pinion-height setup, bearing preload, backlash, and tooth-contact adjustment.

Representative illustrations include sequential twin-turbo and vacuum-hose routing diagrams, fuel-control wiring and relationship charts, charging/ignition/starting circuits, R15M-D structural and Powerflow views, and RB4A-EL cross-sectional, Powerflow, fluid-passage, and hydraulic-circuit drawings. SST tables identify tools by job and number, including the 49 F011 101 ring-gear brake, 49 F018 9A0 compression tester, 49 1232 670A power-steering gauge set, and 49 F027 0A0 pinion-height gauge set.

Chassis Coverage and Important Scope Limits

Steering chapters cover rack-and-pinion gear and pump teardown, pressure testing, and bleeding. Brake repair spans hydraulic service, master cylinder and booster checks, calipers, parking brake adjustment, ABS self-diagnosis, the hydraulic unit, and wheel-speed sensors. Suspension work covers front and rear alignment plus shock/spring, control-arm, stabilizer, strut-bar, and rear toe-control-link assemblies. Mechanical body procedures address doors and glass, hatch and bumpers, wipers, sunroof, trim, seats, and belts.

Full body-electrical troubleshooting is outside this volume; the manual directs that work to the separate 1994 RX-7 Body Electrical Troubleshooting Manual, No. 1380-10-93H. System-level wiring and circuit diagrams for engine, fuel/emission, transmission, and ABS diagnosis are present here, along with body-electrical and air-conditioning summary data in Technical Data.

The rotary rebuild notes flag two easy ways to damage expensive parts: rotor seals and springs must remain in their respective positions, and abrasive cleaning can harm the seals or the soft coating on housing surfaces. Turbo-actuator checks also warn that excessive applied test pressure can damage an actuator. Engine removal, fuel-system service, brake and ABS work, and underbody repair should be carried out with the manual's specified lift/support equipment, pressure precautions, and SSTs.