AV-SCANNER guides
Accessory guides
The testers and workshop tools worth owning, and how to use them. Each guide is free to read here and to download as a branded PDF for the workshop.
Compression Tester
Run dry and wet compression tests
Cylinder Leak-Down Tester
Find exactly where a cylinder loses pressure
Fuel Pressure Gauge Kit
Test petrol fuel pressure safely
Vacuum Gauge
Read engine health from manifold vacuum
Timing Light
Check ignition timing on older engines
Spark Plug Tester
Confirm ignition spark safely
Torque Wrench
Choose, use and look after a torque wrench
Oil Pressure Gauge Kit
Measure real engine oil pressure
Boost Leak Tester
Pressure test a turbocharged intake
Fluid Extractor
Remove oil and fluids from above
Timing Tool Set
Why engines need timing tools and how to use them
Diesel Injector Leak-Off Tester
Compare injector return flow
Oil Filter Wrench Set
Choose the right wrench for tight filters
Spark Plug Socket and Gap Tool
Remove, gap and refit plugs properly
Valve Spring Compressor
Service valves safely
Engine Hoist and Stand
Lift and support an engine safely
Piston Ring Compressor
Fit pistons without damaging rings
Use them with the AV-SCANNER
Look up a fault code, run a local diagnosis and open the right guide from the reader's own menus.
