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DISCO3.CO.UK > Technical (D3)

egr and butterfly valve pics
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j,moore
 


Member Since: 26 Nov 2007
Location: out on the piste, or the piss
Posts: 138

United Kingdom 2006 Discovery 3 TDV6 SE Manual Atacama Sand
egr and butterfly valve pics

as i said here are some pics to show i did my conversion,


take off the covers and ducting, be sure to cover the air intakes to prevent anything entering,


remove the air intake duct shown,

remove the actuator, the round thing whith the wires on the end, this is very fiddly and i ended up removing the black bracket undernieth and the long bolt in the top,then i didnt put the back bottom stud back in the actuator, three is enough i think, make sure you replace the black bracket though,

carefuly remove the butterfly rod as shown,

remove the butterfly valve,


then reassemble the rod as removed whith out the valve,

then put the whole assembly back together, dont forget to conect the actuator inkage to the rod,

this is a basic run down of what to do to remove this valve, just be verry careful not to let anything get into any of the air intake ducts because if you do and then you start the engine it will f Censored k it up big style. also can i please state i cannot be held responsible for any damage caused from any advice given, thanks anyway. Thumbs Up
 

Last edited by j,moore on Thu Mar 20 2008 12:09am. Edited 2 times in total 
Post #275284Wed Mar 19 2008 8:31pm
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10forcash
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Member Since: 09 Jun 2005
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

So, errr..... what benefit does removing the butterfly valve give? the EGR pipes behind the valve appear to still be connected and not blanked off so will still pump exhaust gases into the inlet manifold - won't they?
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Post #275291Wed Mar 19 2008 8:35pm
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j,moore
 


Member Since: 26 Nov 2007
Location: out on the piste, or the piss
Posts: 138

United Kingdom 2006 Discovery 3 TDV6 SE Manual Atacama Sand

now to blank off the egrs,


thease are the pipes, use a suitable tool to remove the top clips,


remove the two studs on the flange of the stainless pipe, do not loose the gasket,


remove the pipe and then reasemble whith a suitable blanking plate maide out of stainless plate, and reassemble whith the plate ontop of the gasket. you could put a gasket on the top and bottom if you prefered,

this is a picture of the pesky egr valve,

as re assembled,


and do the same procedure for the other side, there is alot less room so be carefull and dont loose your cool,

and then dont forget to put the clips back on the pipes and reclip any wires and put the whole thing back together and thats about it. please be carefull and as said above please dont hold me responsible for any damage. my disco has done over 17000miles cince this was done and i have had no problems so i dont see why this wont work for all other cars. i have more pics on my gallery to help so good luck. Thumbs Up
regards jim.
  
Post #275301Wed Mar 19 2008 8:51pm
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j,moore
 


Member Since: 26 Nov 2007
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United Kingdom 2006 Discovery 3 TDV6 SE Manual Atacama Sand

sorry 10forcash, you beat my second post, im not as fast at typing sorry, Laughing
  
Post #275303Wed Mar 19 2008 8:55pm
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10forcash
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

Thumbs Up makes sense now! Thumbs Up
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Post #275309Wed Mar 19 2008 9:14pm
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Dom Harvey
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United Kingdom 2008 Discovery 3 TDV6 GS Auto Stornoway Grey

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Post #275314Wed Mar 19 2008 9:27pm
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simon
  


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United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway Grey

So can someone explain why you would want to do this ?

Surely blanking off the EGR valves is not normal else LR would have done it.

Confused of Shropshire.
  
Post #275333Wed Mar 19 2008 10:24pm
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10forcash
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

EGR's are there purely for emission control, they have zero benefit to engine performance, longevity or fuel efficiency....
In the light of the announced punitive taxes I suggest we all blank off the EGR's (although i'm not sure of the benefit of removal of the butterfly valve...) so that we can be sure of getting maximum value from the fuel we're paying (and being double taxed) for!
Generally, EGR's are only active (open) once the throttle has been released to 'recycle' some of the unburnt gases although to comply with EU4 regs, the EGR's are more active in the mid to low throttle range, blanking them off ensures that only fresh air and fuel enters the cylinders
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Post #275338Wed Mar 19 2008 10:32pm
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simon
  


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United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway Grey

Sorry...

So does it make the engine more efficient power wise or fuel consumption wise if you blank them off ?

If blanked then no recycling of unburnt gases is taking place.

Or does recycle not mean re-use in this case?
  
Post #275342Wed Mar 19 2008 10:36pm
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10forcash
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

recycle means that the unburnt fuels get pumped back into the engine instead of out of the exhaust - great for the twot in the BM / Pious / repmobeel behind you, not so great for the D3's performance, 100% fresh air and fresh fuel will always give you better fuel economy and better performance than stale stuff of varying percentages
EGR's are also responsible for choking up the inlet manifold with carbon deposits, restricting the airflow and reducing performance still further....
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Post #275344Wed Mar 19 2008 10:42pm
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simon
  


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United Kingdom 2008 Discovery 3 TDV6 XS Manual Stornoway Grey

Sounds good.

But does that not mean that your emissions testing during an MOT would go out of kilter up to the point of it failing ?
  
Post #275351Wed Mar 19 2008 10:48pm
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10forcash
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

possibly - if you leave the blanking plate in there for the test Whistle
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Post #275354Wed Mar 19 2008 10:49pm
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stapldm
 


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United Kingdom 2007 Discovery 3 TDV6 HSE Auto Stornoway Grey

Although the EGR blanking instructions are brilliant Thumbs Up I'm confused about removal of the butterfly plate; isn't this part of the engine braking mechanism?
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Post #275355Wed Mar 19 2008 10:52pm
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Gareth
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England 2008 Discovery 3 TDV6 HSE Auto Zermatt Silver

I think the point is that a normally functioning pair of EGR valves will make a negligible difference to engine performance at low throttle settings, and zero difference at higher throttle, because they are supposed to shut when you put your foot down.

When they malfunction, or become clogged, which appears to be happening to a fair few vehicles, then they are very detrimental to performance in general.

Blanking seems to be the cost effective way of fixing the fault if your car is out of warranty. Its been a regular modification on 300tdi D1's and I think TD5's
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Post #275360Wed Mar 19 2008 10:53pm
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10forcash
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United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt Silver

stapldm wrote:
Although the EGR blanking instructions are brilliant Thumbs Up I'm confused about removal of the butterfly plate; isn't this part of the engine braking mechanism?
yes it is - especially on auto boxed versions, the butterfly also forces the engine to suck in exhaust gases when the throttle is closed
Gareth - 100% on the 300tdi & TD5 Thumbs Up
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Post #275362Wed Mar 19 2008 10:57pm
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