M30 Engine Overview for E9 Owners
M30 block families used in the E9, displacement variants, and major service points.
DraftLibrary
Technical Library
Articles arranged by system. Coverage spans both platforms where mechanics overlap, with model-specific notes where they diverge.
Engine
Engine
Cooling
Cooling
E9 Cooling System Layout
Radiator, thermostat housing, and hose routing on the E9 M30 engine.
DraftBMW M1 Cooling System Explained
Coolant circuit, expansion tank, and fan operation on the M1.
DraftE9 Heater Core and Cabin Heat
Heater box access, core replacement considerations, and common leak points.
DraftFuel
Fuel
E9 Carburetor Systems Overview
Zenith and Solex carburetor types, linkage setup, and tuning basics.
DraftM1 Kugelfischer Injection Overview
Mechanical fuel injection layout, pump drive, and injector service notes.
DraftE9 Fuel Tank and Line Inspection
Tank mounting, sender unit, and steel line corrosion assessment.
DraftElectrical
Electrical
BMW E9 Wiring Diagram Beginner Guide
How to read E9 schematics and trace common circuits.
DraftM1 Charging and Starting System
Alternator, starter motor, and battery tray reference for the M1.
DraftE9 Fuse Panel and Relay Reference
Fuse assignments, relay locations, and common failure symptoms.
DraftSuspension
Suspension
BMW E9 Front Suspension Explained
McPherson strut front end layout, bushings, and alignment considerations.
DraftE9 Rear Semi-Trailing Arm Overview
Rear axle geometry, bushing wear, and subframe mounting points.
DraftM1 Suspension Geometry Notes
Double-wishbone front and semi-trailing arm rear: setup and wear patterns.
DraftBrakes
Brakes
BMW E9 Brake System Explained
Dual-circuit hydraulics, caliper types, and pad specifications by year.
DraftM1 Brake System Overview
Ventilated disc layout, caliper reference, and brake fluid specifications.
DraftE9 Brake Line Inspection
Hard line routing, flexible hose condition, and master cylinder assessment.
DraftDrivetrain
Drivetrain
E9 Getrag Gearbox Overview
Transmission types fitted to the E9, shift linkage, and fluid specifications.
DraftBMW M1 Gearbox Overview
Five-speed Getrag layout, clutch operation, and driveshaft reference.
DraftE9 Differential and Halfshaft Notes
Rear axle ratios, limited-slip options, and CV joint inspection.
DraftBody & Chassis
Body & Chassis
BMW E9 Rust Inspection Guide
Primary corrosion zones on the E9 unibody. Inspection methodology and checklist.
ReadE9 Unibody Structure Overview
Major structural members, panel attachment, and load-bearing areas.
DraftM1 Spaceframe Construction Notes
Tubular frame layout, body panel mounting, and structural inspection points.
DraftInterior
Interior
E9 Dashboard and Instrument Panel
Gauge layout, wood trim, and common deterioration patterns on E9 interiors.
DraftM1 Interior Trim Reference
Seat construction, door panels, and original material specifications.
DraftE9 Seat and Upholstery Notes
Seat frame types, recaro options, and reupholstery material reference.
DraftTrim
Trim
E9 Exterior Trim and Badging
Grille, bumpers, side trim, and correct badge placement by model year.
DraftE9 Chrome and Brightwork Restoration
Window surrounds, bumper trim, and replating considerations.
DraftM1 Exterior Trim and Aerodynamics
Front spoiler, rear wing, and body kit component reference.
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