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EGR Valve - How To...
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garrycol
 


Member Since: 06 Dec 2010
Location: Canberra
Posts: 1114

Australia 

The question was asked how do you tell which EGR has failed but I did not see an answer. So how do you tell which one has failed? I appreciate that if one has failed the other will not be far behind but I would prefer to cross that bridge when it happens.

Today I got the check engine light and my scangauge showed error code P0490 - can you tell which one it is from this.

Cheers

Garry
  
Post #8657121st Dec 2011 9:39 am
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Bodsy
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Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

you'll get A or B at the end of it if using a proper fault reader (generic readers don't always give the extra info)
 Bodsys Brake Bible

D4/D3 Remote FBH heat kits
BAS Remaps/ EGR Blank
Transmission Flush
Software updates/enabling


Clock/ SNOTM /3Flash / 4x4Info /BT Update /Service Reset/Error Codes / Gearbox Reset
See It Here 


Last edited by Bodsy on 1st Dec 2011 9:41 am. Edited 1 time in total 
Post #8657131st Dec 2011 9:41 am
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Bodsy
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Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Should have said 405 I think....
 Bodsys Brake Bible

D4/D3 Remote FBH heat kits
BAS Remaps/ EGR Blank
Transmission Flush
Software updates/enabling


Clock/ SNOTM /3Flash / 4x4Info /BT Update /Service Reset/Error Codes / Gearbox Reset
See It Here 
 
Post #8657141st Dec 2011 9:41 am
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garrycol
 


Member Since: 06 Dec 2010
Location: Canberra
Posts: 1114

Australia 

Bodsy wrote:
Should have said 405 I think....


Sorry - do not understand??
  
Post #8657471st Dec 2011 11:41 am
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Bodsy
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Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

P0490 is a general EGR error. P0405A or P0405B shows which EGR valve is failing.
 Bodsys Brake Bible

D4/D3 Remote FBH heat kits
BAS Remaps/ EGR Blank
Transmission Flush
Software updates/enabling


Clock/ SNOTM /3Flash / 4x4Info /BT Update /Service Reset/Error Codes / Gearbox Reset
See It Here 
 
Post #8657521st Dec 2011 11:53 am
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garrycol
 


Member Since: 06 Dec 2010
Location: Canberra
Posts: 1114

Australia 

Ok - thanks for that - before doing anything I am going to fill up with diesel, throw in a double dose of diesel treatment and go for a long drive in Sport mode, driving like it has been stolen and see if that clears it up (hopeful I know) as I am not suffering any performance issues, increased fuel consumption or black smoke - so hoping the EGR is just sticking.

If no change I guess I need to get the codes read (not a cheap exercise) and buy the relevant valve though I expect the other would also be on the way out so just doing the faulty one may be false economy time wise.

It is a shame some boy wonder has not as yet come up with a way to block post 07MY EGRs

Cheers

Garry
  
Post #8657851st Dec 2011 12:57 pm
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WainsWover
 


Member Since: 09 May 2012
Location: Manchester
Posts: 5

2006 Discovery 3 3.0 TDV6 HSE Auto Bonatti GreyDiscovery 3

Disco_Mikey thanks for the excellent idiots guide, just taken both off and waiting for new units.
1964 Landyman, what a great tip. Had a 270 mm flexible drive in the bottom of my toolbox unused for 10 years. Fed it round behind the dipstick and rubber piping and slotted the torx driver through an 8mm ring spanner to guide it into the bolt. 2 minute job even easier than O/S which took about 15 mins.
Many thanks off to buy some new bolts.
  
Post #94296216th Jun 2012 8:21 am
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B16 KJR
 


Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005

Scotland 

[quote]It is a shame some boy wonder has not as yet come up with a way to block post 07MY EGRs
Quote:



Pete Bell at BAS was working on this Thumbs Up
  
Post #94299116th Jun 2012 10:12 am
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dsj1979
 


Member Since: 05 Aug 2011
Location: uk
Posts: 195


I did both yesterday..... what a fun job!

Rather than messing about, I found it easier to take off the EGR valves with the EGR cooler. You have to take a few more bits off but less messing about and struggling to get bolts off! Smile
  
Post #95436413th Jul 2012 5:38 pm
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Buzzstop
 


Member Since: 02 Feb 2013
Location: Scotland
Posts: 1

Scotland 2007 Discovery 3 TDV6 SE Manual Bonatti GreyDiscovery 3

Great detailed post, thanks a lot. replaced both valves on my euro4 yesterday in about 4 hours, I found once the 30torx is located in the inside screw, leave it there until you have entered screw into the new valve, then use a second tool to do outside one, then tighten inner first. ps still lost one to the sump gaurd gods
  
Post #10475472nd Feb 2013 5:44 pm
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Splitpin
 


Member Since: 30 Dec 2010
Location: At the toolbox
Posts: 535


Sorry to drag this up but I will Shocked

Its only applies to blanking the EGRs and removing the throttle butterfly...

Im not sure removing the throttle butterfly is such a great idea. in the event of engine run away this is used to shut it down along with opening the egr valves and the turbo wastegate vanes.

If the butterfly is removed and the egrs are blanked I doubt the VGT vanes will do anything, should the engine try to run on its own oil.

Any thoughts?
  
Post #107032712th Mar 2013 12:53 pm
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Stockley6
 


Member Since: 21 Nov 2012
Location: Stoke-On-Trent
Posts: 2

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
EGR Valve replacement.

Great write up. Helped me tremendously with changing both EGR valves on my 57 Disco3.

Haggled with local main dealership and got both EGR valves (with the most recent upgrade spec- theres been four upgrades to date); 2 sets new gaskets; 8 new stainless steel M6 22mm lgth, 8mm Hex head bolts for what I thought was a half decent price of £320 incl VAT. Doing the job DIY saved me over £400 on dealerships price to replace.

Did consider blanking, but given tricky of the year of registration and while some MOT stations will turn a blind eye to the engine management light, others just won't! and the possible changes to MOT rules for 'newer' vehicles which will =fail.

Did a 12mile test run before hand where I got a dismal 24.6mpg. And the same run afterwards got 32.2mpg. So very pleased.

If you are going ahead and replacing your EGR valves, I'd strongly recommend using stainless steel bolts. Some of the bolts I removed were badly corroded, and pleased to see them come out without shearing.

Next task strip down the old valves to discover just what has failed. One (LHS) stuck permanently shut, the other open. Both have a rattle on shaking. Any guesses.

Cheers (I owe you a pint!)

David
  
Post #112099721st Jun 2013 10:51 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

The little ball bearings that the valve guides run on fall apart, causing the valve to stick. Pretty sure this is what you will also find Thumbs Up

Not to mention the £400 saved Mr. Green
 My D3 Build Thread

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Post #112102122nd Jun 2013 6:15 am
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dave21
 


Member Since: 20 May 2014
Location: kent
Posts: 3

England 2008 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

A very big thank you for this write up, did both on Saturday, would not have considered doing myself before seeing this.
Near side bit of a pig, I unbolted rear bracket on cooler to enable more movement to get to rear torx.
Thumbs Up
  
Post #128661320th May 2014 7:07 am
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Frogsquasher
 


Member Since: 01 Aug 2014
Location: South Yorkshire
Posts: 24

United Kingdom 2006 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3

People have mentioned the blanking kit but have called it a removal kit, question; Can the egr valves be totally removed, made to disappear, poof, gone?
Or are we stuck with the bloody things even if they are blanked off.


....think of the weight saving...
  
Post #134517021st Sep 2014 12:16 pm
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