Hola, iam Nancy Thomas, Don’t overdo it!
Can I Just Top Off Coolant? [Solved]
Top off the coolant reservoir If the coolant level is low in the reservoir, you can refill it to the max fill line but do not overfill it. The coolant mixture expands when it heats up and needs the extra room. Keeping your coolant at the correct level is one of the ways to keep your radiator good working order.
Penrite DIY How to Top Up Your Coolant
Anton de Pasquale and Emily Duggan explain how to
Adding COOLANT, top off COOLANT, FIX LOW COOLANT WARNING LIGHT
How to add
How to Check & Add Coolant
How to Check & Add