Latest posts
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Engine Rebuilding: technical guide to measurement, machining, assembly and diagnosis
Engine rebuilding is a precision process that combines metrology, machining, materials knowledge and careful assembly. Every stage — from block to cylinder head, from crankshaft to valves — depends on suitable instruments and on the tolerances defined by the manufacturer. A seemingly small error can cause noise, oil consumption, loss of compression, overheating, accelerated wear…
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Direct Injection in Otto-Cycle Engines: components, high pressure, mixture strategies and diagnosis
How gasoline direct injection works: low- and high-pressure circuits, the cam-driven high-pressure pump and quantity valve, injectors, homogeneous and stratified modes, stoichiometry with Brazilian fuels, DTCs, carbon deposits, LSPI and safety — with original illustrations and a quiz.
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Aftermarket Car Alarms and Accessories: Security, Comfort and Technical Care
How car alarms work, sensors and rolling-code remotes, power door locks and window modules, kill switches, professional wiring and splicing, CAN network testing (60 Ω), factory immobilizers and diagnosis — with original illustrations and a quiz.
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Car Audio: acoustics, speakers, amplifiers, crossovers, electrical installation and tuning
Sound fundamentals, head units and RCA signals, speaker construction and Thiele-Small specs, amplifier classes and bridging, series/parallel impedance, power cable and fuse sizing, crossovers, gain setting and troubleshooting — with original illustrations and a 10-question quiz.
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Vehicle Lighting System: optics, halogen, xenon, LED, aiming, diagnosis and regulations
How headlamps form the beam, photometric units, bulb categories, xenon (HID) and LED technology, headlamp aiming and leveling, relay and BCM control, workshop diagnosis and Brazilian regulations — with original illustrations and a 10-question quiz.
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Signaling Systems and Wiring Diagrams: relays, horn, turn signals, tail, brake and reverse lights, headlamps
DIN 72552 terminal designations, how relays work and how to test them, horn, turn signal and hazard circuits, dual-filament bulbs, headlamp aiming, fuses, reading wiring diagrams and voltage-drop diagnosis — with original illustrations and a 10-question quiz.
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Alternator: operation, testing, diagnosis and smart alternators
How an alternator works: rotor, stator, rectifier diodes and regulator; the three current circuits; voltage drop tests; bench tests of rotor, stator and diodes; and smart alternators controlled via LIN, CAN or PWM — with original illustrations.
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Active and Passive Safety Systems: ABS, traction control, stability control, ADAS and airbags
ABS, TCS, ESC, ADAS, seat belts and airbags explained for technicians: physics of grip, the ABS control cycle, wheel speed sensor tests, calibration, brake fluid and workshop diagnosis — with original illustrations.
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Turbocharged Engine: operation, components, diagnosis and best practices — exam study material
How a turbocharger works: wastegate, electronic boost control, VGT, intercooler, gauge vs. absolute pressure, turbo vs. supercharger, diagnosis and correct shutdown — with original illustrations.
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Automotive Ignition Systems: From Contact Points to Electronic Systems — Operation, Tests and Diagnosis
From contact points to electronic systems: coil, ignition advance, Hall and inductive sensors, CKP and CMP, wasted spark and COP, spark plugs, knock and a professional diagnostic method.