Technician Reference

A free reference library for classic-car technicians. Browse a preview of each chart below — every full chart and the searchable reference are free with registration. Safety guidance is always provided in full.

Safety

• Safety Precautions

Conversions

• Millimeters to Inches Conversion
• Fraction to Decimal
• Torque Conversions
• Temperature Conversion
• Fluid Equivalents
• Pressure Conversion
• Wire Gauge Reference
• Drill Bit Sizes
• Standard Bolt Torque
• Tap Drill Chart
• Weight Conversions
• Thread Pitch & Wrench Cross-Reference

Diagnostics & Tests

• Compression Test
• Vacuum Gauge Diagnostic
• Battery & Charging System
• Oil, Fuel & Cooling Pressures

Classic-Car Specific

• Firing Orders
• Spark Plug Heat Range & Gap
• Engine Oil Viscosity & ZDDP
• Brake Fluid Compatibility
• Wire Color Code Conventions
• Tire Size Cross-Reference
• Refrigerant Reference
• Loctite & RTV Selection
• Ignition: Points, Dwell & Timing
• Spark Plug Reading Guide
• Fuel, Octane & Unleaded Conversion
• Carburetor Tuning Reference
• Cooling System & Antifreeze
• Generator, Alternator & Voltage Regulator
• Sealed-Beam & Bulb Cross-Reference
• Fuses, Flashers & Relays
• Drum Brake Adjustment & Specs
• Belt Tension & Accessory Drive
• VIN & Date / Casting Codes (Pre-1981)

Reference

• Glossary & Abbreviations

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