Coolant

2.9 V6 24v TFSI - 444 bhp
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elchet
1st Gear
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Joined: Thu Jun 10, 2021 5:45 pm

Coolant

Post by elchet » Mon Mar 13, 2023 12:43 pm

Not sure if I have a (slow / undetected leak), but has anyone else experienced coolant levels dropping over time?

I had an interim service at 4 rings in October, and just checked coolant while topping up washer fluid and the float was low.

Mixed 1:1 VAG coolant with distilled water and it took about a litre to get the float to pop all the way up again. I'll keep monitoring of course but seems fishy.
2018 B9 RS4 Daytona Grey

Elpeterol
1st Gear
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Joined: Tue Apr 03, 2018 10:20 pm

Re: Coolant

Post by Elpeterol » Tue Mar 14, 2023 8:10 pm

This came up some time (couple of years!) ago my car used a little coolant in the first few months but has since settled down.

elchet
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Re: Coolant

Post by elchet » Wed Mar 15, 2023 3:14 pm

Good to know, thanks. This is around 40k miles though so would hope everything is fully bedded in now!
2018 B9 RS4 Daytona Grey

Rusty Racer
3rd Gear
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Re: Coolant

Post by Rusty Racer » Wed Mar 15, 2023 8:53 pm

Maybe a pressure test is required?
2018 RS4 B9 Carbon Edition
2014 RS4 B8

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rjwojcik
2nd Gear
Posts: 209
Joined: Fri Sep 10, 2010 9:21 pm

Re: Coolant

Post by rjwojcik » Thu Mar 16, 2023 8:37 am

What's your oil like?
Current:
2018 RS4 - Navarra Blue / Black
Gone:
2016 A6 BiTDI - Midnight Blue / Black
2016 Golf GTD with a "lot" of toys
2016 M3 CP - Mineral Grey / Black
2009 135i - Le Mans Blue / Black

elchet
1st Gear
Posts: 50
Joined: Thu Jun 10, 2021 5:45 pm

Re: Coolant

Post by elchet » Fri Mar 17, 2023 2:55 pm

I haven't had any oil related issues. Everything looks clean around the cap. No comments on fluids at all at the last interval, except that it's due a sport diff oil change so I'll get that done and enquire about coolant on the same trip I guess.
2018 B9 RS4 Daytona Grey

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rjwojcik
2nd Gear
Posts: 209
Joined: Fri Sep 10, 2010 9:21 pm

Re: Coolant

Post by rjwojcik » Sat Mar 18, 2023 8:38 am

So hopefully your coolant isn't mixing with the oil then...
Current:
2018 RS4 - Navarra Blue / Black
Gone:
2016 A6 BiTDI - Midnight Blue / Black
2016 Golf GTD with a "lot" of toys
2016 M3 CP - Mineral Grey / Black
2009 135i - Le Mans Blue / Black

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