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Has anyone had trouble here? Peugeot tell me that the filter only needs changing if it gets blocked (does this happen?) but that a fluid needs replacing at a cost of £80 plus labour every 40,000 miles. Is this a diy job and can "equivalent" but cheaper fluids be used? all replies gratefully received.
Edited by Pugugly {P} on 19/02/2008 at 20:59
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£80 or £80/litre ?
I think it depends on the age of the car, they changed the lifespan of the filter at some point. I *think* that they replace the filter at 80K.
Screwloose will know for certain.
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trier
If it's not covered by the previous, extensive, postings; then, briefly, the filter will eventually block with non-flammable regeneration residue and will need replacing. [50.000 miles is it's normal service life; though this will vary greatly.]
No other fluid but the cerium-based Eolys will do. Only a well-equipped garage can re-set the quantity in the additive ECU, without which re-filling is pointless.
Edited by Screwloose on 19/02/2008 at 20:58
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If you do a forum search using the drop down menus for Citroen C5, I was filing some of the back catalogue in Tech using the "new" system, there was a very interesting post about this in 2002 ! (I need to get out more)
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Found this on the Citroen site
Particle filter (PF)
Particles have a diameter of around 0.09 microns and consist mainly of carbon and hydrocarbons. The PF traps these particles and periodically burns them off.
Particles burn naturally at approximately 550 °C, but the normal temperature of exhaust gases leaving the manifold is only 150 °C.
The particle filter system overcomes this problem in a number of ways :
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post-injection during the expansion phase, resulting in post-combustion in the cylinder and a 200 to 250 °C increase in exhaust gas temperature (i.e. to between 350 and 400 °C) ;
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additional post-combustion by means of an oxidising catalyst located upstream of the filter. The catalyst acts on any unburned hydrocarbons resulting from the post-injection and raises the temperature by a further 100 °C (to between 450 and 500 °C) ;
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use of Eolys, a cerine-based additive that reduces the particle combustion temperature to 450 °C.
The particle filter system consists of the following :
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a housing containing the pre-catalyst and filter. The filter is a porous block of silicon carbide that traps all particles in the exhaust gases. Sensors monitor clogging pressure across the filter and the gas temperatures at the inlet and outlet of
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the system ;
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a software programme in the engine control unit that controls regeneration of the filter by post-injection every 400 to 500 km depending on the clogging pressure across the filter. The software also provides diagnostic information on the system. During regeneration, the inlet air is no longer cooled by passing through the air-air intercooler but is instead heated to raise the temperature of the mixture in the combustion chamber with a consequent increase in the temperature of the exhaust gases ;
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a fuel additive system consisting of a probe tube, a system to inject Eolys into the main fuel tank and a dedicated electronic controller. The Eolys is stored in a tank adjacent to the main fuel tank and injected in proportion to the volume of fuel added during refuelling. For example, when filling up with 60 litres of fuel, the system will inject 37.5 ml of solution containing 1.9 g of cerine. The Eolys tank has a capacity of 5 litres, sufficient for 80,000 km.
The filter is cleaned and the Eolys tank refilled during dealer servicing every 80,000 km.
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Very interesting - I've never read a proper explanation of this system, only complaints about it.
I have to say it sounds like an appalling botch-up of a job to me. Do all manufacturers do it this way?
Is there no better - ie, simpler - solution?
If not, it looks as though I am wedded to the unleaded nozzle forever...
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Many thanks for your very thorough explanation. The complications seem an unnecessary worry. Diesels aren't simple any more.
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Many thanks. Disappointing to discover yet another complication. I sold my petrol 406 coupe because of very low gearing-at 80mph 4000revs. Don't think I'll bother with the diesel.
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You should join and look at the following owners club www.peugeot406coupe.com. I believe that £80.00 is fairly standard, it is the addative that is the majority of the cost.
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