E46Fanatics - View Single Post - [Cooling System Upgrade] 1-BAR Radiator Cap
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Old 10-07-2012, 01:54 PM   #120
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Originally Posted by SeanC View Post
While not being 100% sure, maybe a system constantly venting is not a healthy one. Think about the venting system being stuck open or in the worse but less likely case, stuck closed.

96 degrees is not the temperature in the block, it is what the coolant temperature sensor in the lower radiator hose measures. I used this value as an approximation of the coolant temperature inside the ET, which will maximize the pressure. We were trying to put a ceiling on the highest pressure, so as to err on the cautious side.

Temperature is probably much higher in the block, but of course not higher than the boiling point. Oil temperature might give a better estimation of that. INPA does have the capability of reading the oil temp.
If you want an example of a venting system that is open, you can look into heavy trucks. I forget the reasons, but they run a non-pressurized open cooling system.

Incorrect on the coolant temperature location. The lower radiator hose sensor is only used for control of the fans. The actual coolant temperature sensor used for engine operation is on the intake side of the head.

Last edited by mkodama; 10-07-2012 at 02:03 PM.
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