Monday, Feb 18, 2013 at 22:18
RA
The water watch does pick up water in the system and because it flows into the filter housing at the top, it is also going through the filter/gauze at the same time the water watch is detecting.
If it is large gobs of water then the probes will detect that immediately. The concentration has to get to 200PPM before the waterwatch will detect emulsified water. So when it detects it if the filter doesn't have some dewatering ability the emulsified stuff has already passed through the filter and on it's way to the HP pump.
Yes you stop and drain but the horse has already run down the lane.
My system uses a dewatering filter and that is designed, nothing is perfect, to attract and hold water emulsified in the fuel so it collects on the filter medium, hopefully on the outside and when built up/collected sufficiently enough it drops into the bowl. Claimed removal 95% of free water removed. So how emulsified that means is subject to discussion. Trust eh! We all trust something.
Either a large filter, larger than most recommend, or two in parallel will allow for the water to have enough time to settle somewhere and not keep trying to go to the engine so urgently. The flow on a V8 LC is higher than a 3litre engine so I see the filtering ability and dewatering to be particularly important because of the flow rate which can occur.
Mine doesn't have a warning the water is there, I look I see.
The OE filter does have both a water level in bowl sensor and also a restriction sensor which activates when the system pressure begins to go below zero.
This feature also works if the pre is clogged or waterlogged and therefore restricted.
I can be corrected but to my knowledge, the waterwatch while a good product cannot actually stop the water, either emulsified or droplets, from travelling onwards. Only the alarm and the stop and drain is the controlling factor. Perhaps I have missed something and it does stop it. I would like to learn more.
FollowupID:
781959