Autonatomy · 06.7 Mechanical Diagnostics, Service & Repair

Training boundary: All examples and case evidence are fictional. This course is not a live diagnostic tool or a vehicle-specific repair procedure. Stop unsafe engine operation, follow current OEM instructions and use qualified supervision for actual mechanical tests and repair. Compression values and leak-down percentages are deliberately not prescribed as universal thresholds.

Diagnostic Evidence Explorer

Explore eight types of mechanical diagnostic evidence, the decisions each can support and their limitations.

Four Diagnostic Journeys

Trace an evidence-based route from complaint through safe testing, repair planning and verification.

Evidence Lab · Diagnose Before You Replace

Four fictional complaint files. Open the relevant evidence, choose a next step and revisit your decision as new evidence appears. These are reasoning prompts, not real compression specifications or OEM procedures.

Open the evidence

Choose a supported next action

Training-only decision summary

Review evidence and complete the cases to build a personal study summary.

Opening cards and selecting an answer do not demonstrate real diagnostic competency or authorize engine operation, disassembly or release.

Mechanical Diagnostic Decisions

Six fictional shop complaints. Choose the most justified next step rather than assuming a major engine component has failed.

06.7 · Knowledge Check

Answer all ten questions to record a browser-local study score. This is not a live engine diagnosis, verified vehicle repair, or supervised practical qualification.

Keep learning

Return to Course Player · Previous: 06.6 Inspection & Reassembly · Practice: existing Compression & Leak-Down Lab

Use the existing compression/leak-down activity as another conceptual learning aid. Real tests must follow the exact engine procedure under appropriate supervision.