Before ordering replacement parts or starting your repair, review the factory torque specifications, required tools, and critical vehicle gotchas below.
Factory Specifications & Torque Ratings
Component / Parameter
Factory Specification
DIY Relevance
Mounting Bolts Torque
35 - 45 ft-lbs (13mm - 15mm)
Torque securely to engine bracket to maintain belt alignment
B+ Terminal Nut Torque
8 - 10 ft-lbs (10mm or 12mm)
Disconnect battery negative BEFORE touching main 12V B+ post
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Step-by-Step DIY Summary
Disconnect Battery: Turn off the ignition, remove the key, and disconnect the negative battery cable (usually 10mm or 8mm). Isolate the cable end.
Relieve Belt Tension: Fit a socket or belt tool on the tensioner pulley bolt. Rotate to release tension and slip the serpentine belt off the alternator pulley.
Disconnect Electrical Connectors: Unplug the field/stator wiring harness plug and remove the protective rubber boot and nut holding the main B+ battery cable.
Unbolt & Remove Alternator: Remove the through-bolts holding the alternator to the engine mounting bracket. Carefully pry or wiggle the alternator free.
Install & Test Voltage: Install the new alternator and torque mounting bolts. Reinstall the B+ wire and wiring harness. Route the serpentine belt according to the diagram and verify all ribs seat into pulley grooves. Reconnect battery and measure 13.8V-14.5V across battery terminals with engine running.
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