Shealesy
Member Since: 09 May 2021
Location: Caithness
Posts: 238
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Especially at this time of year, roads are mucky with salt spray, wipers going for most of any journey, windscreen rapidly gaining that greying muck all over it. Ah ha! But I have squirty water available! Pull on the stick and oh… two whole dry wipes before the magic blue/yellow (other flavours are available) soapy juice comes through. Two wipes of near total blindness.
Not two minutes later a truck sprays you with more muck, ah ha! More squirty water needed! Another pull on the stick, two more blinding dry wipes before the magic happens.
The rear is also getting quite opaque, best have a wash. Push the button, wait, wait, dry wipe after dry wipe, and suddenly clean as the magic fluid reaches the nozzle.
What’s going on? It didn’t do this at first. A recent development over the last few weeks. I’ve just been out (in the blizzard) and had the bonnet liner off. All that pipework is sound, NRVs I can breathe through both ways but they may be fluid switch and not air so unknown, and all 3 at the same time? I have my doubts. My headlight washers also never seem to spray but this maybe needs more testing, and being xenons I want to be considerate to other road users, as headlights are a 24hr necessity from now until April in my local area.
So I’m leaning towards bottle/pump/filter. I am not going to be tackling this in the snow, so maybe at the weekend. Maybe the filter is clogged and flexing, creating negative pressure between it and the pump, then after the scoosh, it’s drawing back down and taking the juice out of the lines?
Happy to take any other rambling thoughts and fix suggestions, or maybe this is simply another wonderful “feature” of the vehicle. (I don’t love it any less, my timed climate has been defrosting it for the school run all week, nothing beats bashing down a deep snowy lane in a warm car).
2016 D4 SDV6 D4 XS Commercial - MY16 - Corris Grey
D3 HSE - MY05 - Java black - Retired
Vauxhall Insignia Country Tourer - PX’d, in a poorly way
GAP IIDBT G3
2x Colliewobbles and a Kelpie
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 20th Nov 2024 11:16 am |
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waterbuoy
Member Since: 26 Oct 2013
Location: Argyll
Posts: 2929
  
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partially frozen pipework? Currently 2009 Disco 3 SE, 2013 MY D4 HSE and 2016 D4 SE
Previously:
TD5 Defender 110 CSW (230k miles)
300TDi Disco 1 (289k)
4 RR Classics (300-350k each, 2 manual, 2 auto)
110 V8 CSW (220k)
S3 109 hi cap pickup (ex RN)
S2A 88 Safari SW with lpg conversion (bloody lethal)
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| 20th Nov 2024 12:13 pm |
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Shealesy
Member Since: 09 May 2021
Location: Caithness
Posts: 238
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Was happening in the summer-like period of November too, temperature in the teens, in November!! And I would hope my -20 screenwash isn’t freezing at a paltry -2. D4 XS Commercial - MY16 - Corris Grey
D3 HSE - MY05 - Java black - Retired
Vauxhall Insignia Country Tourer - PX’d, in a poorly way
GAP IIDBT G3
2x Colliewobbles and a Kelpie
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| 20th Nov 2024 12:29 pm |
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CarlW
Member Since: 07 Aug 2005
Location: Lancashire
Posts: 113
 
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I'm guessing but there's probably a 'one-way' valve in the system somewhere that used to do it's job and stop fluid draining back out of the pipes into the tank but it's now sticking open! Disco 4 Landmark
Mercedes Benz SLK CDi
BMW 335D Touring
Defender XS SW 2010 - gone
TDV8 2008 RRS - gone
Disco 3 HSE 2005 - gone
BMW R1150GS
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| 20th Nov 2024 8:32 pm |
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Shealesy
Member Since: 09 May 2021
Location: Caithness
Posts: 238
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There are non-return valves just before each spray head under the bonnet, and presumably one by the rear squirter, but for all 3 to go bad at exactly the same time makes me lean towards it being something else.
Once I’ve emptied this bottle of fluid I’m going to get in at the pump and see if there’s anything obviously wrong down there. I have used a couple of half bottles of screenwash that were just sitting around and needed tidying up, so could have added some unsavoury gunge in. D4 XS Commercial - MY16 - Corris Grey
D3 HSE - MY05 - Java black - Retired
Vauxhall Insignia Country Tourer - PX’d, in a poorly way
GAP IIDBT G3
2x Colliewobbles and a Kelpie
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| 22nd Nov 2024 8:12 am |
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CarlW
Member Since: 07 Aug 2005
Location: Lancashire
Posts: 113
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It will only take one of the valves to go bad, once air is in the pipe the fluid will drain back to the tank emptying the pipe - next time you run the pump you first have to fill the empty pipe before pressure will build and allow fluid to squirt from the nozzles Disco 4 Landmark
Mercedes Benz SLK CDi
BMW 335D Touring
Defender XS SW 2010 - gone
TDV8 2008 RRS - gone
Disco 3 HSE 2005 - gone
BMW R1150GS
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| 22nd Nov 2024 9:12 am |
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Shealesy
Member Since: 09 May 2021
Location: Caithness
Posts: 238
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Would the rear squirter be affected by a front squirter’s non return valve going bad, or vice versa? Do they share a pump (eg. one direction for front, reverse rotation for rear) or otherwise any pipework? As the rear exhibits the same behaviour.
It’s set to be warmer (anbove 0c) after today so going to have more of a poke about. I’ll try some form of running liquid both ways through the easily accessible NRVs, as air passes both ways through both front ones I suspect they’re a fluid switch. Kind of hope it is one/both of those as they’re easy to get to. Hoping I don’t need to strip the arch liner and all the other kneeling on gravel related parts of getting to the bottle/pumps. D4 XS Commercial - MY16 - Corris Grey
D3 HSE - MY05 - Java black - Retired
Vauxhall Insignia Country Tourer - PX’d, in a poorly way
GAP IIDBT G3
2x Colliewobbles and a Kelpie
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| 23rd Nov 2024 1:24 pm |
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faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 344
 
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did you find anything ? had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
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| 27th Nov 2024 6:53 pm |
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Shealesy
Member Since: 09 May 2021
Location: Caithness
Posts: 238
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Solved. It was indeed one or both non-return valves under the bonnet. Replacements kindly donated by my old D3.
The old D3 also donated its bonnet liner and a few fir tree pegs, it’s considerably more substantial than that floppy piece of felty fabric on the D4. Has a decent amount of structure about it. D4 XS Commercial - MY16 - Corris Grey
D3 HSE - MY05 - Java black - Retired
Vauxhall Insignia Country Tourer - PX’d, in a poorly way
GAP IIDBT G3
2x Colliewobbles and a Kelpie
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| 11th Dec 2024 11:23 am |
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