1990 Honda Prelude Service and Repair Manual

This factory service and repair manual for the 1990 Honda Prelude is built around this exact year, engine and trim, so the specs, clearances and torque values inside are the ones Honda published for the 2.0L B20A5 or 2.1L B21A1 engine under your hood, not a generic figure pulled from another Prelude generation.

Engines covered

• 2.1L inline-four — DOHC, naturally aspirated, gasoline
• 2.0L inline-four — DOHC, naturally aspirated, gasoline
• 2.0L inline-four — SOHC, naturally aspirated, gasoline

Body styles covered

• 2-door coupe

Trims covered

• 2.0 S
• 2.0 Si
• Si
• Si 4WS
• Si ALB
• SR

Known issues on the 1990 Prelude. One recall is on federal record for this model year, covering the front seat belt buckle assembly: the red plastic "PRESS" release buttons on the front buckles can break, and the broken pieces can fall into the buckle mechanism and keep it from latching properly, leaving the belt unable to protect an occupant in a crash. Owners have filed 4 complaints for the year. The factory diagnostic and repair procedures behind that buckle assembly, and everything else on the car, are here.

Whether you're inspecting the seat belt buckles, rebuilding the B20A5 or B21A1 head, or working through a routine service interval, it keeps you on Honda's own procedure and spec for your specific 1990 Prelude.