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I noticed that the smaller coolant reservoir in the rear (for the Turbo) has very slowly gone down to almost empty. Ordered some Petronas Paraflu Up (From Alfissimo who carries it). That stuff should arrive Saturday. I'm going to add some and just keep an eye on the level to see if its disappearing unusually quickly. Car has about 15k miles on it now and I don't believe that any coolant has been added during the two oil changes done by the dealer.
Does anyone know if there's a warning light for coolant low-level on the instrument cluster, or if a warning will pop up somewhere at all?
 

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I noticed that the smaller coolant reservoir in the rear (for the Turbo) has very slowly gone down to almost empty. Ordered some Petronas Paraflu Up (From Alfissimo who carries it). That stuff should arrive Saturday. I'm going to add some and just keep an eye on the level to see if its disappearing unusually quickly. Car has about 15k miles on it now and I don't believe that any coolant has been added during the two oil changes done by the dealer.
Does anyone know if there's a warning light for coolant low-level on the instrument cluster, or if a warning will pop up somewhere at all?
I would think that there'd be a warning light.
 

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I noticed that the smaller coolant reservoir in the rear (for the Turbo) has very slowly gone down to almost empty. Ordered some Petronas Paraflu Up (From Alfissimo who carries it). That stuff should arrive Saturday. I'm going to add some and just keep an eye on the level to see if its disappearing unusually quickly. Car has about 15k miles on it now and I don't believe that any coolant has been added during the two oil changes done by the dealer.
Does anyone know if there's a warning light for coolant low-level on the instrument cluster, or if a warning will pop up somewhere at all?
If you are talking about the intercooler expansion tank for the coolant which also supplies the turbo low pressure electric coolant pump (the one which runs for a minute or so after stopping engine), you could have a coolant leak from a faulty O-ring on the turbo inlet/return pipe. I would suggest checking for coolant residue around the turbo to make sure you don't have this issue. When this happened to me I did not notice it till I got a check engine warning for "Charge air cooler temperature", code P026A.

There is a TSB for this.

Copy of TSB from US market:
NUMBER: 0900517
REV. B
GROUP: 09 Engine
DATE: August 22, 2017

SUBJECT: 2.0L Coolant Hose ORing Replacement

OVERVIEW: This bulletin involves replacing the O-ring on the turbocharger coolant return hose.

MODELS: 2017 (GA) Alfa Romeo Giulia

NOTE: This bulletin applies to vehicles within the following markets/countries: NAFTA.

NOTE: This bulletin applies to vehicles built on or before January 13, 2017 (MDH 0113XX)
equipped with a 2.0L 280HP I4 DI Turbo Engine (Sales Code EC2).

SYMPTOM/CONDITION:
The customer may experience a small coolant leak from the O-ring seal of the turbocharger coolant
return hose.

DIAGNOSIS:
If a customer’s VIN is listed in VIP or your RRT VIN list, perform the repair. If any vehicle not on the
VIN list exhibits the symptom/condition, perform the repair.
 

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If you are talking about the intercooler expansion tank for the coolant which also supplies the turbo low pressure electric coolant pump (the one which runs for a minute or so after stopping engine), you could have a coolant leak from a faulty O-ring on the turbo inlet/return pipe. I would suggest checking for coolant residue around the turbo to make sure you don't have this issue. When this happened to me I did not notice it till I got a check engine warning for "Charge air cooler temperature", code P026A.

There is a TSB for this.

Copy of TSB from US market:
NUMBER: 0900517
REV. B
GROUP: 09 Engine
DATE: August 22, 2017

SUBJECT: 2.0L Coolant Hose ORing Replacement

OVERVIEW: This bulletin involves replacing the O-ring on the turbocharger coolant return hose.

MODELS: 2017 (GA) Alfa Romeo Giulia

NOTE: This bulletin applies to vehicles within the following markets/countries: NAFTA.

NOTE: This bulletin applies to vehicles built on or before January 13, 2017 (MDH 0113XX)
equipped with a 2.0L 280HP I4 DI Turbo Engine (Sales Code EC2).

SYMPTOM/CONDITION:
The customer may experience a small coolant leak from the O-ring seal of the turbocharger coolant
return hose.

DIAGNOSIS:
If a customer’s VIN is listed in VIP or your RRT VIN list, perform the repair. If any vehicle not on the
VIN list exhibits the symptom/condition, perform the repair.
Thanks. I’ll check for any leaks in that area. My “Paraflu“ coolant arrived so I’ll top it up and keep a close eye on the level over the next few days/weeks.
 

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@omnicube , I just posted some more (new?) information on this thread:
Cheers
 
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