Mazda RX-7 Service and Repair Manual EWD

Detailed repair manual for Mazda RX-7 with full electrical diagrams (EWD). Includes information on the rotary engine, transmission, chassis, brake system and electrical equipment. Suitable for professionals and owners who want to service and repair the car themselves.

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1st generation (SA/FB) - 1978-1985

2nd generation (FC) - 1985-1992

3rd generation (FD) - 1992-2002

1. 12A Rotary Engine Problems

High Oil Consumption – Unlike piston engines, rotary engines are designed to consume oil to lubricate the seals. Owners often forgot to add oil, which led to wear.

Worn Rotor Sealing Lips (Apex Seals) – The main vulnerability of rotary engines. When using low-quality oil, bad fuel, or overheating, these seals wear out, reducing compression and leading to a loss of power.

Engine Overheating – Due to design features, rotary engines are prone to overheating, especially if the cooling radiator was dirty or the cooling system was inefficient.

2. Carburetor Problems

Early versions of the RX-7 were equipped with a Nikki carburetor, which required frequent adjustments. Due to contamination of the jets, problems with fuel delivery occurred.

3. Electrical

Over time, problems with the wiring could arise, especially at the contact points and connectors.

4. Body corrosion

Like many Japanese cars of those years, the first generation RX-7 was prone to rust, especially on the sills, fenders and underbody.

5. Suspension problems

The car had a rear dependent suspension with a solid axle (unlike the more advanced independent solutions of competitors), which affected handling.

Over time, the silent blocks wore out, which led to a deterioration in stability on the road.

6. Low engine life

On average, the service life of the rotary 12A was 100-150 thousand km with good maintenance, after which a major overhaul was required.