We'd like to remind Forumites to please avoid political debate on the Forum... Read More »
Screen wash in coolant reservoir!

Liverpool35
Posts: 2 Newbie
in Motoring
I have just put some screen wash in the coolant reservoir of my 2017 Audi s4! :eek:
Did it on the driveway and haven't driven it. There's about a litre gone from the screenwash bottle but half of it went over side of coolant reservoir as coolant reservoir was full unlike the screen wash reservoir which the dash was telling me to fill! So probably say no more than 500ml went in.
Google suggests common mistake! but gives conflicting answers. Some people say nothing to worry about screenwash is mainly just deionised water anyway. Other people say not major issue but do need to get it out but just use turkey baster or something to siphon it out of reservoir as it will like just sit on top of coolant in reservoir as engine not started then add some coolant or deionised water if necessary. Others say need to drain and refill coolant system.
Some of those who suggest the drain and refill say especially important with aluminium engine blocks as screenwash could corrode them. Not sure if me engine is aluminium.
Have RAC membership so not sure if this would be covered so call them out?
Anyone have any thoughts?
Did it on the driveway and haven't driven it. There's about a litre gone from the screenwash bottle but half of it went over side of coolant reservoir as coolant reservoir was full unlike the screen wash reservoir which the dash was telling me to fill! So probably say no more than 500ml went in.
Google suggests common mistake! but gives conflicting answers. Some people say nothing to worry about screenwash is mainly just deionised water anyway. Other people say not major issue but do need to get it out but just use turkey baster or something to siphon it out of reservoir as it will like just sit on top of coolant in reservoir as engine not started then add some coolant or deionised water if necessary. Others say need to drain and refill coolant system.
Some of those who suggest the drain and refill say especially important with aluminium engine blocks as screenwash could corrode them. Not sure if me engine is aluminium.
Have RAC membership so not sure if this would be covered so call them out?
Anyone have any thoughts?
0
Comments
-
Meh.
*padding*0 -
What a pointless comment0
-
Liverpool35 wrote: »What a pointless comment
No, not at all. Remove excess liquid from header tank.
Sorted.0 -
Given the value of your car I would remove the excess then get the coolant changed. But ultimately upto you.0
-
It's not a big deal IMO. Since you haven't driven anywhere the screenwash will still be in the header tank - just drain it out again and top up to the required level.0
-
Why does a brand new car even need the coolant topping up?0
-
It didn’t, OP put it in the wrong place.
If it was me witha brand new car I’d drain and replace.0 -
This discussion has been closed.
Confirm your email address to Create Threads and Reply

Categories
- All Categories
- 350.1K Banking & Borrowing
- 252.7K Reduce Debt & Boost Income
- 453.1K Spending & Discounts
- 243K Work, Benefits & Business
- 597.4K Mortgages, Homes & Bills
- 176.5K Life & Family
- 256K Travel & Transport
- 1.5M Hobbies & Leisure
- 16.1K Discuss & Feedback
- 37.6K Read-Only Boards