S2Steve

I've ordered a new thermostat for my RS, just wondered if theres anything I need to know when fitting, i'd imagine its straightforward. Is there any torque settings I need to know?

tabetha

Fitting is quite simple, I never bother with torque settings, just don't go mental on the spanner etc.
After fitted run engine up to temp, with the cap ON, then switch off, and leave about 30 minutes, as it cools it will form pressure in the ex tank that will draw out any trapped air, make sure the uppermost hose/bleed hose is nice and clear.
tabetha

Chris69

really? i always thought the rs turbo self bled with the cap off? its how i've always done it
run it upto temp with the cap off till at least the fan kicks in?

rst230bhp

iTrader: (1)

Thats how i do it

tabetha

I know lots of my friends do too, but look at it this way, it is the pressure, that causes the self bleed once engine is shut off, if the cap is on longer, ie whilst car is running it has more pressure.
Additionally some cars run near 100C anyway, so may well overheat the coolant before the fan kicks in, not good, the pressure is of course needed to raise the boiling point of the fluid.
Having the cap on will in no way at all hinder the air coming out, as some may think, as above if actually helps.
I would guess the cap off thing probably stems from older cars, where the cap was on the rad itself, you couldn't see the level so had to leave it off, or keep putting back taking off etc.
Different people have different ways, this is just mine.
tabetha