Spec 82-86 BMW 325/528 2.7L / 86-93 BMW 325 2.5L / Stage 1 Clutch Kit

An E30 325i or E28 528e with a slipping clutch, a takeoff shudder, or a pedal that only grabs at the very top is overdue for a new disc and pressure plate. The SPEC SB101 is a Stage 1 kit for the M20-powered BMWs: the 1986-1993 325 with the 2.5L, the 1982-1986 325e and 528e with the 2.7L, and several related models. It uses a molded organic lining, so it drives like a fresh factory clutch but with more holding power for an engine that has intake, chip or cam work.

What the clutch kit does in an M20 BMW

Behind the M20 inline six sits a Getrag five-speed, and the clutch is the only link between them. The pressure plate clamps the disc against the flywheel; when you press the pedal, the release bearing pushes the diaphragm fingers and frees the disc so you can shift. SPEC rates SB101 at 363 ft-lb of torque capacity, well above what a stock 2.5L or 2.7L makes, so it has margin for a mildly modified engine without the harsh bite of a puck disc. SPEC lists the kit weight at 17 lb.

Symptoms of a worn E30 or E28 clutch

• RPM climbs under load in fourth or fifth without the car gaining speed
• Judder pulling away, often worse once the drivetrain is warm
• Engagement right at the top of the pedal travel
• Grinding into first or reverse, or the car creeping with the pedal down, which points to poor release
• A rattle or squeal that changes when the pedal is pressed, usually the release bearing

Engagement shudder on these cars can also come from worn transmission or engine mounts or a guibo that lets the drivetrain wind up, so check those while you are under the car.

How to confirm it is the clutch

The E30 clutch hydraulics share the brake fluid reservoir, so a low reservoir, a leaking slave or an air-bound line can stop the clutch from releasing. Fix any hydraulic issue first. For slip, try a gentle full-throttle pull in fifth from low speed and watch for the tach running ahead of road speed. Our guide to diagnosing slipping covers what to look for, and this explainer on flare vs. slip helps sort out a vague symptom.

Fitment

SPEC lists SB101 for the BMW 325 E30 2.5L (1986-1993), the 325 E30 2.7L eta (1982-1986), the 323 (1981-1986), the 325ix (1988-1991), the 524 (1982-1985), the 525 (1989-1990), the 528 E28 built through April 1986, the E30 M3 (1987-1991) and the E36 M3 3.0L (1995-1996) when used with the original dual mass flywheel. Coverage varies by production date on the E28, so send us your year and VIN, or compare the old disc and cover, before ordering. For a stronger setup on a boosted or built engine, see the SPEC SB103 Stage 3 kit, or shop more in our clutch kit collection.

Install notes

• Remove the old pilot bearing from the crank with a pilot bearing puller and press in a new one.
• Resurface or replace the flywheel; a glazed or heat-checked surface will cause chatter with a fresh disc.
• Center the disc with a BMW-pattern tool like the BMW clutch alignment tool kit, then tighten the pressure plate bolts a little at a time in a crisscross pattern.
• Check the release fork and its pivot pin for wear, lightly grease the input shaft splines, and bleed the slave cylinder with fresh brake fluid.
• Drive gently for the first few hundred miles so the organic lining beds in evenly.

How much torque will SB101 hold?

SPEC rates it at 363 ft-lb. That is plenty for a stock or mildly modified M20. Big turbo builds should step up to Stage 2 or Stage 3.

Will it feel like the stock clutch?

Close to it. SPEC's Stage 1 uses a molded organic lining built for smooth engagement and long life, so it suits a daily-driven E30 or E28.

Does it fit the 325e eta and the 528e?

Yes, SPEC lists the 1982-1986 325 E30 2.7L and the 528 E28 built through April 1986. Send us your VIN if your car was built in 1986.

Can I use it on an E36 M3?

SPEC lists the 1995-1996 E36 M3 3.0L only when used with the original dual mass flywheel. Confirm your flywheel before ordering.

What else should I buy with it?

A pilot bearing, flywheel bolts if you remove the flywheel, fresh brake fluid for the bleed, and a release fork pin if yours is worn.

• How to Diagnose Transmission Slipping
• Shift Flare vs. Slip: How to Tell Them Apart
• Automatic vs. Manual Transmission Repair Cost