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5.0 Water Leak - Colorful at Reservoir, WHY???

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Old 12-06-2020, 09:40 PM
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I'm just here waiting to see the explanation of why he was only running water in the cooling system. How the hell it didn't overheat is beyond me, the normal operating temperature is right at the boiling point of water.
Old 12-06-2020, 10:32 PM
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Originally Posted by RL1990
I'm just here waiting to see the explanation of why he was only running water in the cooling system. How the hell it didn't overheat is beyond me, the normal operating temperature is right at the boiling point of water.
The boiling point of water is 212 F at sea level. The coolant system runs at 16 psig, so the boiling point of pure water in the coolant system would be around 260 F. You won't risk overheating if you run pure water (pure water actually has better heat transfer properties than a 50/50 antifreeze mix), but corrosion would be a huge problem.

Last edited by antony1103; 12-06-2020 at 10:37 PM.
Old 12-06-2020, 10:36 PM
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Originally Posted by RL1990
I'm just here waiting to see the explanation of why he was only running water in the cooling system. How the hell it didn't overheat is beyond me, the normal operating temperature is right at the boiling point of water.
Er, nope.
Originally Posted by antony1103
The boiling point of water is 212 F at sea level. The coolant system runs at 16 psig, so the boiling point of pure water in the coolant system would be around 260 F. You won't risk overheating if you run pure water (pure water actually has better heat transfer properties and a 50/50 antifreeze mix), but corrosion would be a huge problem.
Yup, antifreeze is in there for a lower freeze point and to protect components, seals etc. if you didn't need that, it would be a more efficient cooling system with just water, the only thing affecting the boiling point is pressure.
Old 12-07-2020, 06:55 PM
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So is the engine roast if that is actually rust?



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