Engine Mechanical and Performance Checklist

Cooling Overheating Diagnostic Checklist

A structured overheating diagnostic sheet for fan, cap, thermostat, pump and airflow faults.

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Checklist Preview

  • Overheating: confirm actual temperature with scan data or thermometer
  • Overheating: check coolant level only when safe
  • Overheating: inspect radiator fins and airflow path
  • Overheating: test fan fuse, relay and command
  • Overheating: check thermostat opening behavior
  • Overheating: inspect pressure cap and overflow circuit
  • Overheating: look for water pump circulation clues
  • Overheating: pressure test for leaks
  • Overheating: check for combustion gas if symptoms persist
  • Overheating: record final fan cycle temperature

How To Use It

Use this checklist before replacing parts. Work from the top down, record the result of each step, and only move to repair decisions when the failed test is clear.

The downloadable PDF includes checkboxes, notes space, final verification and technician sign-off fields for workshop records.

Download Access

The page preview is public for SEO and learning. The PDF download route is available only to logged-in registered users through the existing Tutor login system.

Tools To Prepare

  • Compression tester
  • Leak-down tester
  • Cooling pressure tester
  • Vacuum gauge
  • Borescope

Evidence To Record

  • Cylinder readings
  • Temperature state
  • Leak path
  • Final comparison

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SEO and Research Notes

This original Motomech worksheet is built from common workshop inspection logic: verify the complaint, inspect safety-critical systems first, measure before replacing parts, document the failed test, and finish with a repeatable road-test or service verification.