answer
Describe the condition precisely
Coolant is visible or its level repeatedly falls.
- system
- cooling
safety
Can you drive it?
Limit driving and arrange prompt inspection. Stop immediately if the symptom worsens or affects control, braking, steering, temperature, oil pressure, smoke, or fire.
- safety level
- stop soon
symptoms
Conditions that narrow the cause
Record cold or hot operation, idle or load, speed, braking or turning, weather, recent repairs, fluid levels, warning lamps, codes, noises, smells, and whether the symptom is intermittent.
observations
- temperature
- load
- speed
- warning lights
- codes
- recent work
diagnosis
Use the least-invasive confirming test
Begin with visual and basic safety checks, then scan the relevant modules and test the suspected system under the conditions that reproduce the symptom. Do not replace a part from the symptom name alone.
actions
- Pressure-test cooling system — Check the cooling system for external and internal leakage at controlled pressure.
SOURCES
- Car Trouble Lab diagnostic methodologyCar Trouble Lab · editorial source
sources
How this page was produced
Car Trouble Lab assembled this page from the cited public records and automated quality checks. A named independent automotive technician has not reviewed this page unless a verified reviewer is explicitly listed. Use the primary records and a qualified technician for vehicle-specific safety, diagnosis, or repair decisions.
- methodology path
- /methodology
- editorial process
- source-linked automated quality gate
- editorial policy path
- /editorial-policy
- independent technical review
- No