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Hey did you go through with this conversion? I'm looking at doing the same.

That's bizarre! I believe the only other path for coolant to escape is through the one-way bleed valve and back into the reservoir (besides the one-way valves for coolant entering the block). Part 28 in this diagram - https://webautocats.com/etka/audi/aq5/751/121410/

Thanks very much Matt. My needle is solid now, but I've had to replace a few things to get it that way. Sticking coolant shut-off valve, the vacuum solenoid that controls it (N489) and two temp sensors (G62 & G694). So you still haven't been able to resolve your fluctuating temps? Did you...

Wait a sec, is this you on the same site? https://www.touareg-club.net/forum/showpost.php?p=3155965&postcount=317 Can you please share the image on this page - http://www.touareg-club.net/forum/showpost.php?p=2617419&postcount=112 Apparently it's a document from VW saying this behavior is...

And just today I drove for 4 hours with 1 stop, the whole time the commanded coolant temp was 70°C. Doesn't seem right, but there are no fault codes or anything like that which might cause this. The oil temp was well over 85 on occasions. I'm wondering if the ecu is running in some kind of...

I know my control valve is working properly now, I had to replace it recently as it was getting stuck and not fully opening, therefore the block circuit was overheating. But that's all back to normal, I can see the block temp hit 105 then the control valve opens and the temp drops back down to...

Hi Matt, I'm seeing the same behavior in my CRCA engine Touareg. Could you elaborate more on your findings? This has been bugging me for a long time. I've asked the same question on clubtouraeg but no one has any ideas over there. For me, when the outside temp is above 15 degrees C, the...