Coolant level 360 and small leak

This article may shed more light on the subject of radiator cap pressure rating and its relationship to coolant boiling points. It certainly dispels the use of a .9 bar cap. The benefit of adding Water Wetter to anti-freeze coolant system is another controversial subject for further reading.
Beating the Heat: Advantage of a High Pressure Radiator Cap | Tuner University

BTW, T.Rutland sells an OEM cap for $35.

 

Just bid and wait. I bid on that one and got it.
Alan

 

Using the numbers quoted in the article a difference of 0.1 bar in pressure results in a difference of less than 2.5 degrees Celsius in boiling temperature - it doesn't seem very significant to me? Or maybe that's what you meant as well?

 

I believe the number stamped on the cap is the pressure differential at which venting occurs - i.e. when the inside pressure exceeds the outside pressure by (say) 0.9 bar, the vent opens. Standard atmospheric pressure is around 1 bar, so venting would occur at an internal pressure of 1.9 bar, which equates to a boiling point for pure water of 119C / 246F, or higher in the case of a 50/50 antifreeze mixture.

 

Did kimpearsonusa ever find out what the cause of this leak was?