Thread: Air Filter Housing Water Detection

Originally Posted by manic

My air filter housing has a drain nipple on the bottom that is tired so I'm replacing it with a rubber bung, and hopefully it will all be water tight.

My safari snorkel seals to the outer wing and has a drain hole, both are a bit dodge. Although I have sealed it all up pretty well, with the heater box on its hard to keep checking up on it.

So, should water get pulled into the filter housing I presume it will collect at the bottom of the filter housing and the housing would need to fill with water before it could be sucked through the turbo? If thats the case would it be worth installing a water detection sensor into the base of the filter housing?

I was thinking of getting a relay switch like this one
Kemo M158 water alarm/monitor switch module buy now - Conrad Electronic SE Water detection kits / modules Electronics Online Store
and sealing the detection wires into a rubber bung that replaces the drain nipple at the base of the filter housing.

Is the original like a rubber 'beak' ?
If so this is designed to close when the engine is running and air is being drawn through the filter but when you turn the engine off it opens and lets any water drain out. Fully 'automatic' and no warning alarm needed.

Colin

hi Colin,

Yeah the rubber beak - they wear out and fail to close, so suck water in. I might be able to get a new one from somewhere but if water is getting in around the snorkel or filter joins it might help to know.

I've stuck a ton of sensors on recently, perhaps I'm getting carried away.

- Matt

It is called the evacuator valve. It is an integral and necessary part of the Donaldson air cleaner system. Go to any truck or diesel spares shop and buy a new one for very little. It uses intake pulses to dump (evacuate) the centrifugally removed particles that are spun out of the intake stream.

Originally Posted by Brian Hjelm

It is called the evacuator valve. It is an integral and necessary part of the Donaldson air cleaner system. Go to any truck or diesel spares shop and buy a new one for very little. It uses intake pulses to dump (evacuate) the centrifugally removed particles that are spun out of the intake stream.

I like the sound of what your talking about but what I have is a standard defender tdi air filter housing with a rubber drain nipple at the base

like this
http://i6.photobucket.com/albums/y24...dwithvalve.jpg

Originally Posted by manic

My air filter housing has a drain nipple on the bottom that is tired so I'm replacing it with a rubber bung, and hopefully it will all be water tight.

.

I think you are talking about the " dump valve", which sticks out into the wheel arch. I believe its primary purpose is to "dump' dust & dirt from the bottom of the air filter housing. If I am going thru water which I think might be a tad high , I place a large paper clip over the "beak", and remove it when thru, If the dump valve is not perished or cracked, best to leave it, it does have a purpose, Bob [ Then again, I'm talking TD5 ]

I would not worry about the odd bit of water in the bottom of the filter housing,
it wont get past the element, plus will soon evaporate and get ingested as water vapour, you will probably even benefit from it.

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