Alternator Belt Tension and Routing
A belt is specified by rib count, profile and effective length. How tension is set, why routing matters, and how to tell a slipping belt from a bad bearing.
ReadAlternator, Starter & A/C Compressor Guides — Page 2
Page 2 of 3. Technical guides for alternators, starters and A/C compressors — diagnosing a fault, replacing a part, reading an OE number, and how freight and minimum order quantities work.
Replacing an Alternator Pulley and Belt
Break the pulley nut before the belt comes off. Order of operations for swapping an alternator pulley and belt, the tools needed, and the mistakes to avoid.
ReadBad Alternator Symptoms, in the Order They Appear
Which bad alternator symptoms show up first, what the warning light actually reports, and the checks that separate a failing alternator from a flat battery.
ReadWhat Does an Alternator Do? How Charging Works
What does an alternator do: where the current comes from, why output at idle matters more than the headline rating, and what ends an alternator's life.
ReadHow to Test an Alternator With a Multimeter
Four meter readings, four verdicts: resting voltage, charging voltage under load, AC ripple and voltage drop, plus what each reading rules out.
ReadAlternator Replacement Cost: How to Read a Quote
Why the same alternator job is quoted three different ways, which lines move the number, and how to compare two quotes without guessing.
ReadHigh Output Alternator Sizing: Choosing a Rating
Size a high output alternator from your own load list: continuous load, output at idle, pulley ratio, and the wiring an upgrade actually needs.
ReadHow to Replace an Alternator
How to tell a bad alternator from a flat battery, test it with a multimeter, and replace it safely — with cost drivers, pulley and regulator notes.
ReadIs It a Bad Battery or Alternator? A Meter-First Diagnosis
Whether the fault is the battery or the alternator comes down to four readings. A meter-first order of tests, and why a new alternator often changes nothing.
ReadAlternator Wiring and Mounting: What You Can Replace
Alternator wiring, connectors and mounting, and which parts can be renewed — regulator, rectifier, brushes, pulley — versus when the whole unit must go.
ReadWhy Is My Car AC Making Noise? 6 Common Causes Explained
Six reasons a car's air conditioning makes noise, how to tell them apart, and which ones you can fix without opening the refrigerant circuit.
ReadStarter Motor Repair vs Replacement
When a starter motor fails, which faults are worth repairing and which make replacement the cheaper answer — with the checks that decide it.
Read