Inspecting A Used Car Engine Compartment (50 Points)

Onsite Car Inspections

Mobile Vehicle Inspections Engine Checklist Guide

This detailed list covers various components and systems within the engine compartment, ensuring a thorough inspection of the vehicle’s mechanical condition. Adjustments can be made based on specific vehicle types and models.

internal combustion engine automotive

Engine Inspection:

Engine Oil:

Check oil level and color.

Look for any visible contaminants.

Transmission Fluid:

Inspect transmission fluid level and condition.

Brake Fluid:

Check brake fluid level and clarity.

Power Steering Fluid:

Inspect power steering fluid level.


Check coolant level and color.


Inspect the battery for secure mounting.

Check terminals for corrosion.

Battery Voltage:

Use a multimeter to measure battery voltage.

Drive Belts:

Inspect belts for wear and proper tension.

Timing Belt:

Check the timing belt for wear and replace if necessary.

Engine Hoses:

Inspect hoses for cracks, leaks, or bulges.


Check radiator for leaks or damage.


Test thermostat functionality.

Air Filter:

Inspect air filter for cleanliness.

Fuel Filter:

Check fuel filter for any signs of clogs.

Engine Mounts:

Inspect engine mounts for wear or damage.

Exhaust System:

Check for rust, leaks, or loose parts.

Oxygen Sensor:

Test oxygen sensor functionality.

Spark Plugs:

Inspect spark plugs for wear and proper gap.

Ignition Wires:

Check ignition wires for wear or damage.

Distributor Cap and Rotor:

Inspect for wear or corrosion.

PCV Valve:

Check PCV valve for proper operation.

Brake Booster:

Inspect for vacuum leaks.

Master Cylinder:

Check master cylinder for leaks.

Fluid Leaks:

Look for any visible fluid leaks under the engine.

Engine Cover:

Inspect for proper installation.

Vacuum Hoses:

Check vacuum hoses for cracks or leaks.


Inspect for leaks or abnormal noises if applicable.

Coolant Hoses:

Inspect coolant hoses for wear or damage.

Coolant Reservoir:

Check coolant reservoir level.


Inspect oil dipstick for proper oil level.

Oil Filler Cap:

Check oil filler cap for proper sealing.

Throttle Body:

Inspect for carbon buildup.

Intake Manifold:

Check for leaks or loose connections.

Exhaust Manifold:

Inspect for cracks or leaks.

Turbo Intercooler:

Inspect for damage or leaks if applicable.

Radiator Cap:

Check radiator cap for proper sealing.

Engine Coolant Temperature Sensor:

Test for proper functionality.

Power Steering Pump:

Check for leaks or unusual noises.

Brake Lines:

Inspect brake lines for corrosion or leaks.

Fuel Injector:

Test fuel injectors for proper spray pattern.


Check alternator for proper charging.

Starter Motor:

Test starter motor functionality.

Serpetine Belt Tensioner:

Inspect for proper tension.

Cruise Control Module:

Test cruise control functionality.

Throttle Position Sensor:

Check for proper operation.

Engine Ground Strap:

Inspect for secure connection.

Exhaust Gas Recirculation (EGR) Valve:

Test for proper functionality.

MAP Sensor:

Inspect for proper operation.

Battery Cables:

Check battery cables for corrosion and tightness.

Engine Control Module (ECM):

Scan for any stored error codes.

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