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Under 3500kg vehicles, e.g. Land Cruiser, Land Rover, Subaru etc.
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  #1  
Old 9 Feb 2011
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300tdi Air Filters
Eve Gents

Just wondering what the more extensively travelled folk thought of Air filtration and if the standard system was enough.

In my little experience of Morocco and the dusty mountain tracks of the Alps I would have thought no. quite simply because the filter was dirty after some 2-3000 miles of use even with a raised air intake.

I have the option of the military twin filter canister and was wondering if others use this and what their thoughts were with regards to replacement, effectiveness etc.

Any other options? We will be heading across central asia/mongolia/siberia in 2 years time so will be putting plenty of miles on the clock over dusty roads.

Cheers,

G
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  #2  
Old 10 Feb 2011
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I put in a K&N filter in my 300Tdi before traveling RTW and I've just cleaned it for the third time (didn't really need it but I was doing a clean up of all the rest of the intake system) since getting it in 2002. I last cleaned it in 2005 before going into Australia (again not needed but required by AQUIS), and it's seen lots of dust roads since then, red Aussie dust and all through south and cenral America. When I fitted it I noticed that it seemed to reverse the slightlt drop in power I noticed when I fitted the raised intake with "cyclone top". The Cleaner and oil kit available are enough to clean it at least twice and take up a lot less space than 1 replacement filter. I did keep a very regular check on its condition and removed any flies that got in there but that was pretty much it. I'm sure there are other brands just as good, pipercross etc. but that worked for me and I cant see myself changing it..

Mal
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Old 10 Feb 2011
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I think Discovery filters are good, cheap as chips and light....so take a couple of spares, and have the old one cleaned with an air compessor when you get the chance.

Not sure how the military cannister works....sorry
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  #4  
Old 10 Feb 2011
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Hello. I would recommend the standard factory fit air filters. Get an OE (origional equipment) one and I think that's about as good as you're going to get.
The reason your filter needed cleaning was because it was doing it's job. Although, like you say, another pre filter would help this.
The K&N filter won't need cleaning as much as it's letting more air through (gives a little more power - cool) but it also lets more dust through (no so cool!)

If you've got a raised air intake then the cyclone pre filters are pretty good, like they have on tractors.

Byee
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  #5  
Old 10 Feb 2011
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Quote:
Originally Posted by mattsavage View Post
Hello. I would recommend the standard factory fit air filters. Get an OE (origional equipment) one and I think that's about as good as you're going to get.
The reason your filter needed cleaning was because it was doing it's job. Although, like you say, another pre filter would help this.
The K&N filter won't need cleaning as much as it's letting more air through (gives a little more power - cool) but it also lets more dust through (no so cool!)

If you've got a raised air intake then the cyclone pre filters are pretty good, like they have on tractors.

Byee
thanks for that, yes my 90 has original engine and filter etc. Suppose your right, it is doing its job! dont fancy the K&N really.

The 300tdi military ones are more or less the same, but they are slightly larger in diameter and length. They also have a smaller cylindrical filter that slots inside which I have been told the MOD only fit for operations in Iraq and Afgan. I was thinking I could run the internal filter for the duration of my trip whilst only replaceing the outer one over a longer period... maybe.

maybe im thinking about it too much!

G
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  #6  
Old 13 Feb 2011
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Unless you have found a supplier Griff you can't ge hold of either filter very easily. The second pre-filters are especially difficult to find.

Why add more complication? If you are worried about it fit an agricultural pre filter to the snorkel top and carry a spare paper filter.
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  #7  
Old 29 Sep 2012
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this is what you need, donaldson pre filter with clear bowl...period!

I have seen these do miracles in mining industry where visibility can be only 3 feet...and the machines run constantly in dust....oh, I have one of these in my RRC and now 3rd. year on the dusty roads, and the filter is still clean!

Donaldson 7" Cyclonic Pre-Filter - Expedition Portal
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