C4 screenwash jets blocking
-
- Posts: 12
- Joined: 20 Aug 2024, 10:15
C4 screenwash jets blocking
I just bought a 2023 D4 III coupe (5 door). The screen wash jets have just blocked up for the fourth time. The dealer I bought it from has been very helpful in replacing them, but my suspicion is that a past owner has filled the screenwash system up with dirty water, and that when I drive, the muck in the tank gets disturbed and blocks the jets - the filter at the top of the filler pipe looks dirty. The service manager reckons that's unlikely as he says there's a filter in the tank/pump area to catch any dirt particles that might do that. Any ideas? Thanks, Max
-
- Donor 2024
- Posts: 590
- Joined: 25 Oct 2019, 07:20
- x 426
Re: C4 screenwash jets blocking
I would remove the tank and flush it out, and the pipework. You are probably correct with the dirty water theory
Thanx to Marc and all the admins & knowledgeable people that make this the best forum on the interweb.




-
- Forum Admin Team
- Posts: 26792
- Joined: 02 Mar 2008, 14:30
- x 5187
Re: C4 screenwash jets blocking
Not even dirty water. Algae can grow in the tank, especially if the washers aren't used frequently, and block the jets.
As above, remove the tank and give it a thorough clean and back flush the pipes.
As above, remove the tank and give it a thorough clean and back flush the pipes.
-
- Donor 2023
- Posts: 14003
- Joined: 01 Apr 2012, 09:47
- x 3130
Re: C4 screenwash jets blocking
I had an issue where the car I bought had been parked up for a long while. This turned the screen wash jelly like. I would get a momentary spurt of water out of the main nozzles. My mechanic put an air line onto the pipe (after disconnecting it from a nozzle), and then blew it through for a while. This not only cleared the pipes, it broke up the jelly. We topped up the water, and the screen wash is working properly (and has had a couple of top ups since).
James
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
ex C5 2.0HDi VTR
ex C5 2.0HDi VTR
ex C5 2.2HDi VTX+
Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
ex C5 2.0HDi VTR
ex C5 2.0HDi VTR
ex C5 2.2HDi VTX+
Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
-
- Donor 2024
- Posts: 796
- Joined: 06 Jun 2023, 15:26
- x 196
Re: C4 screenwash jets blocking
Until you have time to remove and clean the washer tank you could syphon the water out, fill again with clean water and repeat. Small diameter hose similar to brake bleeding can usually be fed into the tank, places like B&Q sell it. If you can get a garden hose into the tank you could flush it but chances are it would be too stiff to get round any bends. Screen wash additives can lead to algae.
-
- Posts: 12
- Joined: 20 Aug 2024, 10:15
Re: C4 screenwash jets blocking
Thanks all that's all very useful. Max