Cooling "problem"

[hunker7]

Hi guys. Changed the thermostat today, refilled the coolant(managed to fit 6 liters) and I can't get the air out of the system. Hooked up VagCom and temp rises to about 95C and won't go up, but thermostat ain't opening either. Thermostat housing hose is barely warm, so is lower rad hose. Been out for a drive, nothing changes. Scared to drive it now.

[AndyP]

Genuine thermostat?

[hunker7]

Wahle I think.

[Cottis]

Should be this

Wahler p/n is 4116.87D1

Had it written down on a bit of paper, as been meaning to do mine for ages (it doesn't get up to temp when cruising, only when stationary) along with the MFTS

[hunker7]

That's the one. It gets upto temperature ok, sits at 95 won't climb or drop. Went for a drive and it didn't change a bit.

[Majorcina]

Also the hoses are not hot

[AndyP]

Take the thermostat out and test it in a pan of boiling water.

[Majorcina]

That's what i told him already

[hunker7]

Doing it now. What is it suppose to do? Because I put both old and new one in the sink, poured boiling water and they do nothing.?

[Majorcina]

they shud "swtich" like closing

[Majorcina]

But it most be above 87celzius

[AndyP]

Doing it now. What is it suppose to do? Because I put both old and new one in the sink, poured boiling water and they do nothing.?

Put them in a pan of water on the cooker, when the water gets hot enough , you will see the stat open. Pouring boiling water over it will not get it hot enough to open.

https://www.youtube.com/watch?v=HEqL0-z3svE

[hunker7]

Both thermostats opened, I'll put it back on and heat the car up as much as I can, then leave it for the night and see. Because I couldn't get it open when it was on the car.

[Majorcina]

So your previous problem was not thermostate related,most be MFTS?

[hunker7]

But doing the "climate control diagnostic" MFTS works. I am starting to think that gauge is playing up.