Disco 2 Headlight washer non-return valve.

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Yoguko

Active Member
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151
Location
York
Need to change this as the water in my bottle keeps peeing out of the headlight washer jets. When the water level drops below the height of the headlight washers it stops, but by then I've already wasted a few litres of it.

Anyone knows if I need to remove the whole bumper to access it?

Mine's a facelift D2.

Thank you and happy Valentine's
 
Hello

If you download rave workshop manual it is all listed in that.

It does look like it is all in the trim finisher.

Cheers
 
Although I am not sure if there is a non return valve in there for the headlamp washer, Sounds more like the pump may be fubarred.

Cheers
 
Although I am not sure if there is a non return valve in there for the headlamp washer, Sounds more like the pump may be fubarred.

Cheers
Thanks neilly.

Pump's ok. I can use the washers, no problem, they just leak when the water level in the bottle is above the jets. Got the nrv in the post today, just wondering if anyone had done it before.
 
Correct me if I'm wrong, but a non-return valve will stop the water flowing BACK from the jets to the bottle.
Your washers are running forward from the bottle to the jets, so a non-return valve IMO won't help.
I'm with @neilly here, it's probably a fault in the pump. OK it pumps as it should, but it doesn't close off the flow when the power is no longer applied.
 
IMO that non return valve is normally closed diaphragm type and opens under the high pressure when the pump starts then when the pump stops it closes..so if the diaphragm lost it's strenght it doesnt close anymore so the fluid gets to the jets as in comunicating vessels... in this case it's a good place to start and if a new one doesnt fix things then the pump becomes suspect
 
IMO that non return valve is normally closed diaphragm type and opens under the high pressure when the pump starts then when the pump stops it closes..so if the diaphragm lost it's strenght it doesnt close anymore so the fluid gets to the jets as in comunicating vessels... in this case it's a good place to start and if a new one doesnt fix things then the pump becomes suspect
Absolutely right.

I actually got hold of an old NRV and I can blow through it with no resistance, whereas the new one is very tight and doesn't allow any air through. I'm guessing the diaphragm is past its best. Will get it changed over the weekend and I'll report back.

Thanks for all the help.
 
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