Coolant

[gaz-williams]

As stupid as I sound what coolant shall I buy to top it up or shall I just use water??

 

[Fletcher]

Renault Type D Coolant.

 

[gaz-williams]

Cheers mate!

 

[Kazumz]

As stupid as I sound what coolant shall I buy to top it up or shall I just use water??

Water boils quickly, so no.

 

[Foxspeed]

Water boils quickly, so no.

that's what the pressure cap is for....

 

[Kazumz]

that's what the pressure cap is for....

But doesn't water boil at a much lower temperature than coolant?

 

[03area]

by having the system pressurised it allows the water to boil at a higher temperature. not sure precisely how it works, but its used in F1 cars, their coolant doesnt boil till about 14 degrees

 

[Stephenvenning]

Basically at sea level water boils at 100C, at high altitude or pressure lower than 1 it will boil at a lower temperature. At high pressure it boils at a higher temperature.

This is because the molecules in water can expand easily into the ambient atmosphere in a low pressure due to there being more room (low pressure has less density) and vice versa

 

[Foxspeed]

yep - pressurised cooling system - modern motors have them a lot higher now - the st runs at 21psi!