SMALL METAL CAP. BIG JOB.
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That little radiator pressure cap plays a critical role in your cooling system.
As coolant temperature rises, the cap maintains system pressure. Higher pressure raises the coolant’s boiling point, helping prevent boiling and steam formation during high-temperature operation.
🌡️ At atmospheric pressure:
Water boils at about 100°C (212°F) at sea level.
⚙️ With a pressurized cooling system:
The boiling point increases, depending on the coolant mixture and the cap’s rated pressure.
Why does this matter?
If coolant boils, steam pockets can reduce effective heat transfer and contribute to overheating.
💡 Quick Quiz:
What happens to coolant’s boiling point when cooling-system pressure increases?
A — It goes up ✅
B — It goes down
C — It stays the same
⚠️ A faulty or incorrect pressure cap can cause coolant loss, poor pressure control, or overheating.
Never underestimate the little parts. 🛠️
#AutomotiveCarIndia #CoolingSystem #RadiatorCap #EngineCooling #Mechanics #Automotive
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