Cleaning windshield wiper system T shaped valve

The T piece probably incorporates a one way valve on each side so that the water does not run back to the tank (which would make it take longer to spray onto the screen) If the T piece is blocked then soak it in a descaler, either the type for kettle or irons or just vinegar.

you could replace it with a t piece without valves, a shop that sells aquarium stuff would probably have something, either add inline one way valves or just live with the slight delay in water delivery.

If the jets for the screen are blocked then the best way to clear them is using a miniature drill bit, most people do not have these available so a bristle from a wire brush is the next best, after ensuring the hole is clear use compressed air to get any lumps out.

I would not recommend plain water, not even demineralised, I would always add a proper screen wash fluid.

Ultrasonic cleaners are great for little bits like this. Assuming you have one.

How much is this T-tubing, for Buddha sake?!!

You should try to use warm vinegar with a seringe to force the passage still it work and rinse with tap water. If you used normal water, it made depots in all the system. You should clean all the reservoir and tubing and use only good liquid.

Nedavno Mrcheerful napisa:

Yes, it does incorporate one way valve, but I there must be also some sort of pressure relief valve. Here is the photo of the T piece:

I will do that, but I use this rarely, and I fitted new one about year and a half ago.

I drilled trough the old one, and I use it like that for now.

Jets are not blocked, new ones are fitted at the same time as the valve, and with the old drilled trough valve the spray OK.

Where I am I can not find screen wash fluid that I can be sure that will not harm rubber around the windscreen. I bought some, and it turned to blue colored leaf-like smelly stuff (the reason I changed valve and jets). So I thought that demineralised water is the next best solution.

Nedavno SteveH napisa:

No, I don't. :-(

the bleed off holes are in some in line valves, I hink there must be a diaphragm in them, as maybe pressure relief, perhaps yours have failed?

as for the fluid, then yes, use demineralised as the next best thing.

Nedavno Lin Chung napisa:

It is not the price. Nearest dealer is 100 miles away, plus I have to wait until they get the part from Germany (last time I bought it dealer did not have it in stock, my car is from '87). Then I have to wait for the part to pass the customs, and then go and get it.

Altogether one to two months :-( Everything is different, slow and usually more expensive here.

If you don't add *something* to the water, bacteria will grow and the resultant mess will keep blocking things up.

Can you get methylated spirits? Adding that at around 2-5% dilution would help.

Chris

Nedavno Chris Whelan napisa:

Methylated spirits... Is this alcohol used for medical purposes (for disinfection)?

It your part of the world, it may be known as denatured alchohol.

See here:

You just need something to prevent bacteria growth. Good quality screen wash additive will contain something that does the job.

Chris

Nedavno Chris Whelan napisa:

OK, thank you.

Nedavno Yvan napisa:

I went to the shop that cleans cartridges for ink-jet printers, and ask them to clean T-valve with their ultrasonic cleaner.

Nothing happened. It seams that something inside is broken :-(

If I blow at the point where fluid comes in, I can hear air escaping at openings (pressure relief?). I guess I'll order new one...

When I broke a 316 a couple of years back and sold the bits on eBay, I had more people asking for that T-piece than anything else - pity I'd already thrown it away.