Can overheating damage radiator cap?
5) Overheated Engine Leaky coolant or air in the cooling system can lead to an overheated engine. If you notice your engine getting too hot, don’t look under the hood unless you’ve turned the engine off. If there is coolant near the radiator cap, there could be damage to the pressure cap.
How long should I wait to open coolant cap?
Typically though it should be left to cool for 1-2 hours before it’s cooled sufficiently to open the rad cap safely. If you’re actually trying to check the coolant level then you probably need to wait more like 3-5 hours (as if the coolant is still warm it will show a falsely high reading due to expansion).
How long after driving Can I open coolant cap?
Is it normal to lose coolant after 28K miles?
Checked the coolant in bottle as I could see any in the bottle from the side and I heard a air hiss when opening cap. Now the heat has improved. At warm engine the coolant bottle is below the cold mark. I plan on adding some, likely a cup or two. Is a cup or two considered “normal” over 28k miles since last coolant change? What is normal tolerance?
How much coolant does a WRX Outback lose?
There is a gap around the return hose from the radiator where it enters the reservoir bottle, and under high temperatures this gap easily allows for the loss of 1 or 2 cups of coolant over 28k miles due to simple evaporation. As I said though, this is assuming the Outback and the WRX have the same setup.
When was the last time I replaced coolant in my car?
It has been honestly 3.5 years since it was last replaced/filled (30k miles) and checked. Make mine another vote for checking into any measurable loss. The only path to the outside world for coolant mix to vaporize through should be the pinhole vent in your reservoire cap.
Where does the coolant go when the engine is turned off?
When the system goes above normal pressure, with expanding coolant volume, like when the engine is at full operating temperature and is shut off, excess coolant by-passes the radiator cap and flows through a tube and empties into the top of the plastic recovery reservoir which can go to “full hot” level.