2.7 fuel filter flow rate ??

Ean Austral · 26th October 2016, 04:49 PM

Gday All,

I have just checked the workshop disc I have and it has the info for the 4.0 & the 4.4 but nothing about the 2.7 diesel filter flow rate.

Can anyone tell me what the flow rate needs to be for a fuel filter on the 2.7 please.

thanks in Advance.

Cheers Ean

**Narangga** · 30th October 2016, 02:49 PM

I'm no help Ean. I've even spent some time trying to find out (via internet) what the flow rate is on various manufacturer's filters are but no one gives away any secrets. Maybe we're not supposed to know...

Ean Austral · 30th October 2016, 02:59 PM

Oh well thanks anyway , I guess the worse figures I have seen are around 22l / 100ks so simple brain tells me add a bit and use 30lts/ hour then add some for return so am guessing a flow rate above 50ltrs / hours should cover it.

I am looking at putting a proper water trap filter inline so am about to choose the filter and do some measuring for where it will fit. Looking at the size of the existing filter on 2008 model I would be surprised if the flow rate is anywhere near my figures .

Cheers Ean

**101RRS** · 30th October 2016, 03:08 PM

Water traps are exactly that - water traps and usually there is no filter in them - for example - the Water Watch product. Generally speaking any filter that allows fuel through will also allow some water through hence the "trap" method rather than the "filter" method is preferred.

Ean Austral · 30th October 2016, 03:45 PM

I will re- phrase it . I want to put a better fuel foilter with water trap capabilities that the 1 that is currently there. I am going to leave the existing unit in place just fit another unit inline.

Cheers Ean

**eddy** · 30th October 2016, 04:57 PM

Ean,
Check out the current Oil catch can for a D4 post,on the second page Dalil post shows a photo of his setup of a water trap/filter.

**LRD414** · 31st October 2016, 07:59 AM

Originally Posted by eddy

Check out the current Oil catch can for a D4 post,on the second page Dalil post shows a photo of his setup of a water trap/filter.

Thread link for future reference:
http://www.aulro.com/afvb/l319-disco...-can-d4-2.html

Regards,
Scott

Ean Austral · 31st October 2016, 08:39 AM

Thanks Scott,

I have Sent a PM as I am curious how and where that is plumbed in, it is similar to what I had in mind but L/R use a hard type fuel line with connectors , that is normal rubber fuel hose so I can only assume it comes off the fuel cooler but some more info would be great.

Cheers Ean

**isuzurover** · 31st October 2016, 08:50 AM

Originally Posted by garrycol

Water traps are exactly that - water traps and usually there is no filter in them - for example - the Water Watch product. Generally speaking any filter that allows fuel through will also allow some water through hence the "trap" method rather than the "filter" method is preferred.

Modern diesel filters perform water separation in the filter. Commonrail injectors are much more sensitive to water than old style injectors.

Old style water traps are pretty crap in terms of separating fine water droplets. Even more so in common rails with the higher fuel recirculation rates and fuel temp.

I am surprised that the cav type filter above has enough flow for the application. it may not be rated for a high enough temperature either.

**101RRS** · 31st October 2016, 10:08 AM

Originally Posted by isuzurover

Modern diesel filters perform water separation in the filter.

Yes and no - in the 2.7 fuel filter the water separation process is done inside the fuel filter housing but not specifically by the filter inside it - there is an area at the bottom of the housing where the fuel basically slows down and the water separates out at the bottom (hopefully setting off the alert) and the fuel then goes on into the filter. The problem is the water catchment in the OEM filter is too small and unless acted upon immediately the water can still go through the filter and stuff up the HPFP etc.

Ean - with the small water watch unit they disconnect the rubber hose that goes into the fuel filter and run fuel hose from their up to a spare mount just in front of the air filter in the engine bay - the small water catchment is installed there and rubber fuel hose then runs from there back to the fuel filter inlet. The large Water Watch is mounted elsewhere but uses the same connections.

If you are using just water trap that is a good arrangement but if you are going to just use a filter with a finer gauge than the the OEM then ideally that should be mounted downstream from the OEM filter. The logic being that the OEM will catch the larger particles and the new finer filter catches the smaller ones.

Some people like to mount the finer filter first but this catches everything including the larger stuff and clog up quickly and the OEM is doing nothing but the little water catchment will still work.

Clearly their are different views on this sequence but people who have mounted the finer filter first in other vehicles being used in dirty conditions have reported the finer filter does clog up quickly.

My thoughts for what it is worth.

Garry

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