RS4 (B8) Coolant Question

[Hodgie]

Hi All,

I have an Audi RS4 B8. Its new to me and I'm a little concerned about the colour of the coolant as per the below photo. I have extracted a small amount and it is purple as G12 should be however when viewed from the reservoir as below it is more orange/brown.

The car drives ok, doesn't overheat etc. Just wondering if others with a similar car have the same? the black reservoir doesn't help!

Thanks,

[Dr G]

Has it ever been replaced? I've a 2015 Q7 here on original coolant that's pretty yucky looking. Nothing wrong with it so flush, fill, and go again.

B8 RS4 you could do a glycol test as gearbox oil cooler failure is not unheard of.

[Hodgie]

I don’t know if I’m honest, there is a lot of history but no mention of coolant so assuming not. I’ll get it flushed and changed and hope that resolves it. There’s been three gearbox services. Thanks

[Iceblue]

Hodgie said:

Hi All,

I have an Audi RS4 B8. Its new to me and I'm a little concerned about the colour of the coolant as per the below photo. I have extracted a small amount and it is purple as G12 should be however when viewed from the reservoir as below it is more orange/brown.

The car drives ok, doesn't overheat etc. Just wondering if others with a similar car have the same? the black reservoir doesn't help!
Check if the expansion bottle has silikat on it some contain a small bag of silica crystals which releases additives to supposedly help with aluminium corrosion, they can burst and cause discolouration and worse still the crystals can block the radiator and heater matrix alot of people take them out burst or not.

Thanks,