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E34 M5 Discussion 1988-1995 Sedan and Touring

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Old 14th February 2006, 16:13   #1
bay
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Cooling system
All

What pressure is there on the cooling system ?

My hose seams hard..

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Old 14th February 2006, 21:18   #2
Tomba
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the pressure valve of the coolant reservoir (pressure valve = the socket on the reservoir) opens at 2 bar (for E34 M5 S38) (=29 psi).

The overpressure is used to higher the boiling point of the coolant water (normal 100 degrees celcius). nowadays engines run @ 110 - 113 degrees celcius. (better efficiency).

Probalby the reason why your coolant hoses are hard (otherwise you might change them ) If the engine is could you should sqeesh them easy.


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Old 14th February 2006, 22:46   #3
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Hi

The hoses is all okay and easy to sqeesh when cold, but just seams hard when the engine is hot, and there will be if it got 2 bars pressure thanks for the reply tomba

I think my termo switch in my radiator for the electric fan is defekt...

The fan is running when I make a loop on the termo switch, but not when engine is hot so better get a new one..

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