207 SW Water Problem

First of all, greetings. I own a 2011 207 SW. My car was losing coolant. Or rather, let me put it this way. One day I see the coolant level below minimum, the next I see it's back to normal. The entire cooling system, including the thermostat, radiator, reservoir, etc., has been replaced. The problem is still the same. (I don't know if it's a problem.) One morning I wake up, open the reservoir, and the water level is normal. The next day I open it, and it's low. Three days later, I open it again, and it's normal. :) The mechanic says it's normal. I'm just worrying too much, but I don't understand.

If the difference you're describing isn't a difference of at most 1cm due to the car being on a hill, the mechanic is talking nonsense. Besides, on a hill, 1cm seems small on one side and large on the rear. You'll understand that. Otherwise, it's absolutely not normal. There's probably air in your coolant system. As someone who always changes my own oil, water, and filters and has owned a 207 for eight years, I recommend that if you're at all knowledgeable, you can bleed it yourself. But be very careful; when you open the hood when the engine is at 90 degrees, water splashes onto you and you can burn yourself. What you need to do is idle the car for 10 minutes. It will release the air automatically. If the air conditioner is set to hot and the heater is running, it will also remove the air from that area. Furthermore, air in the coolant is a problem that can damage the engine over time. This is because air is constantly flowing through one section instead of water, and it may not be providing full cooling. antipollution2023-12-16 09:16:38