water level/ header tank experiment

[willg95vr6 0]

if you run your car to normal operating temp (let it cool down a little) then take the cap off the header tank. the water level should be at the correct level.

 

but

 

what i need to know is, what does your car do when you rev the engine slightly?

 

mine: the water will go down slightly and remain still/calm but as soon as you lower the revs to idle the water wil get all choppy and bubble over quite baddly. (which is why i am loosing so much water - cap back on when driving by the way)

 

The T piece hose going in the the top of the header tank is hot on the left side but cold on the right (not sure is that is suppose to do that or if it blocked - the cause of the problems).

 

The lower pipe coming from the thermostat is hot (so i think i just wasted my money on a new one)

 

could anyone let me know what you car does on the above experiment.

 

cheers

Will

[willg95vr6 0]

just to add from looking at other threads.

 

car gets up to running temp (no bubling up for water)

thermostat kicks in when starting to get hot (lower pipe gets hot)

then

thats when the water starts to bubbly over

 

at this point the fans are not cutting in but will do later

 

any ideas anyone - cheers Will

[ZippyVR6 0]

Once the thermostadt opens up the pump is running the water through the system continually, this is what is causing the water to bubble over. It is a great way of releasing any airlocks in the system.

[willg95vr6 0]

when the car is idling the water pipes are rock hard with pressure, is that right

also i just ran vag - com 512.1 and got an error back saying:

00522 engine coolant temperature sensor (g62) 26-10 implausable signal - intermittent

 

if i run vag-com 409-1 i dont get this error message

 

you reckon this has anything to do with the problem (lossing water through excess pressure)