A4 b8 2.0tdi 105kW problem with coolant temperature

[Gunnark100]

Good, now you can change hole hose, or just part of the hose, if regulator will not fix the issue, next one is return valve, which is also part of the same hose and you cant see this either.

Good luck!

[Audidua]

Thank you, I hope this will fix the issue.

[Gunnark100]

Lets hope so, as the last guy on this russian link posted, he replaced both at the same time, so for him, no idea which was faulty!

return valve separate number is:
1J0122351(20 pound or something like that)

[Audidua]

If I get it right number 1. is Regulator and number 2. is Return Valve?

[Gunnark100]

Should be yes!

Rura wąż wody Audi A4 8K0 B8 03L121157B 1K0121113A VAG. Nanodatex

[Audidua]

Thank you, thank you, thank you...I would not fix this without your help.




I've changed the thermostat only and all is fine now. Thermostat was payed about £15 and was without OEM part number and Audi logo because it is treated and sold like aftermarket part. If you want to purchase it in official service then the price is 3x higher.




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[Audidua]

Here I am with some news about coolant temperature. After thermostat 1K0 121 113A changed all was fine but last few days I've noticed that the coolant temperature is dropping on cca 83 degrees celsius if I set the heating on HI or little bit less. If the heating is set to 25-26C then all is good no oscillations at all even on idle. Is it the return valve 1J0122351 the issue now?


Sent from my iPhone using Tapatalk

[Audidua]

Here I am with some news about coolant temperature. After thermostat 1K0 121 113A changed all was fine but last few days I've noticed that the coolant temperature is dropping on cca 83 degrees celsius if I set the heating on HI or little bit less. If the heating is set to 25-26C then all is good no oscillations at all even on idle. Is it the return valve 1J0122351 the issue now?


Sent from my iPhone using Tapatalk

[Gunnark100]

Here I am with some news about coolant temperature. After thermostat 1K0 121 113A changed all was fine but last few days I've noticed that the coolant temperature is dropping on cca 83 degrees celsius if I set the heating on HI or little bit less. If the heating is set to 25-26C then all is good no oscillations at all even on idle. Is it the return valve 1J0122351 the issue now?
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I never tested any of my car like this, could be normal, especially for tdi engine. I would keep things as they are! Keep 20-25 and dont boil the egs

[Rob69]

If the engine is not working hard but gauge is sitting at 90' and you set the cabin heater to HI, a small drop in dashboard temperature is normal, especially we are now in lower ambient temperatures, does this happen if you are driving steady at say 2500rpm and then set heater to Hi?