Reply With QuoteSo nothings changed since the first unit injector engines came out.
Extra inline filters was the advice from a a mate at Land Rover Australia in '98 when they had a spate of injector warranty claims on the then new Storm TD5.
Swaggie
I have been at a major filtration conference the last week.
There was some bad news for anyone who has a commonrail diesel and expects the injectors to last. A study of commonrail diesel filters under real operational conditions found that none were able to keep the particulate levels within spec. Which means that the injectors on medium and heavy duty diesels won't last to their design life.
Light duty diesels (e.g. the TD2.7 etc) are considered "disposable" engines, so the injectors may still last the life of the engine.
However, the upshot of this is that it would be a VERY good idea to fit a 2nd inline filter if you plan to keep your commonrail diesel for a long time or you travel to areas likely to have dirty fuel (e.g. the CSR).
There is some info in this paper - however the presentation had lots of extra info.
http://www.afssociety.org/spring2011...egan-paper.pdf
Moderator
So nothings changed since the first unit injector engines came out.
Extra inline filters was the advice from a a mate at Land Rover Australia in '98 when they had a spate of injector warranty claims on the then new Storm TD5.
ChatterBox
SubscriberSo my old Tdi just looks better and better.
If I keep it long enough its value may increase exponentially .
Wayne
LordRover
SupporterSurely you would not just bung in another inline filter - most likely of the same particle size - if particles pass though one filter they would also pass through the second filter.
However, I would fit a lower micron filter after the main filter.
Garry
REMLR 243
2007 Range Rover Sport TDV6
1977 FC 101
1976 Jaguar XJ12C
1973 Haflinger AP700
1971 Jaguar V12 E-Type Series 3 Roadster
1957 Series 1 88"
1957 Series 1 88" Station Wagon
ChatterBox
Just how do you put in another inline filter with a TD5 pressurised lines with strange path through the system
Swaggie
Garry - (almost all) filters are not sieves. So micron ratings of filters are a bit of a misnomer.Originally Posted by garrycol
A particle of a given size has a certain probability of being captured by the filter. Lets say you have a filter that removes 50% of 4 micron particles. If you put 2 filters in line, you will then remove 75% of the original concentration, rather than 50% that just A single filter would remove.
The study I linked above showed that the main issue is resuspension of particles by vibration (or reduced efficiency of the filter due to vibration). Which implies that the rougher the road the more dirt you are getting to your injectors.
TopicToaster
Would a centrifuge filter be applicable in this situation?
Given that with oil they are used as a bypass filter will it work for fuel?
I guess if the flow rate is ok it could be put in line. Would also need a second pump to repressurise the fuel.
Just thinking out loud!
Swaggie
No - as you mention they are bypass filters, not full flow. The pressure drop across them is far too high and the flow rate far too low for use as a FF fuel filter.
Master
I gotta agree, theres alot to be said for all this hi-tech stuff in 4wd's these days.
i reckon my 300tdi will be going strong long after later model landrover diesels have spatten the dummy
ForumSage
So Ben. Was there any word on water causing injector failure as well? Where I'm going with this is do we need to install water traps and filters or is just an extra filter going to do the job?
I'm also interested in what the failure mode is. Is it accumulated particles blocking up fine ports, is it wear or is it something else?
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