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egr valve

Started by pabinlove, February 13, 2012, 10:37:49 PM

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February 13, 2012, 10:37:49 PM
hi to all this is my first post so hi,

my problem is that i have oil leaking out of the egr valve, i have read how to take the manifold off. but i was just wondering if i can just replace the valve or gasket or something or do i have to take the whole lot off.
all help is welcome many thanks
February 13, 2012, 11:07:50 PM #1 Last Edit: February 13, 2012, 11:17:36 PM by Mirez
Hi and welcome to the forum! Did you read the cleaning post? If so that's more geared towards performance gains then your problem as you don't need to strip it down that far. The EGR valve can be replaced on its own in situ if you have good dexterity!

The oil is coming from blow-by (oil forced by the piston rings (which is perfectly normal btw)) which then enters the intake system via the turbo. The EGR valve contains a small valve that is moved by vacuum as the ECU dictates. The valve sits in a metal bush which allows it to slide with the vacuum. Over time the knarly gunk that builds up in the intake manifold erodes the bush which when coupled with the pressurised intake air allows oil vapour to pass between the valve and bush. Unfortunately at the bottom of the valve are two small holes which are designed to exhaust the displaced air from the valve but of course allows the oil to drain out as well and that'll be where your leak is originating from.

There aren't a lot of options open in terms of a simple fix, you can't block the holes as the valve will just stick in the up position (bad!) and there are no serviceable parts inside the EGR so you can't replace the bush. You can replace the EGR valve in its entirety but its not at all cheap or you can buy something called an "EGR delete kit" which basically does away with the EGR valve and replaces it with a strait through pipe - its debatable if that's strictly legal though although its quite common for people wanting more performance to do. The final option is to fit an oil/air separator to the car which will remove oil from the intake system so there's nothing to leak - this is what I have installed on mine however again its not cheap but at least fixes a number of issues in one hit :) I can provide more info if this is something you are interested in. The last option is to seal the holes are disable the EGR system by disconnecting the vacuum pipe and plugging it, again its not technically legal to disable an emissions system though albeit its unlikely to ever be discovered :)

Finally though whilst my mentality is "it shouldn't do that, fix it" this is a cosmetic inconvenience rather then anything else, you will be loosing such a small amount of air that there will be no performance problem and other then the oil being visible as a leak its not something to worry about :)
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February 17, 2012, 01:25:40 PM #2
Thank you for your advice seen and downloaded the post on how to clean the manifold looks quiet tight in there, i have no problem in taking anything to pieces, as I'm the same that shouldn't do that so fix it but knowing it doesn't affect to much i will leave that one till later many thanks Paul
March 19, 2012, 07:17:09 PM #3
hi all
just a quick one roughly how much will egr valve cost me? nolt had chance to look computer not responding very well at the min
March 20, 2012, 03:56:42 AM #4
Just got a brand new Wahler OEM unit for Ã,£133 when I rang VW dealer they want Ã,£178.
Fords not doubt will be dearer
There were some secondhand ones also on ebay although personally I would give them a miss.
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
March 20, 2012, 04:15:18 PM #5
hi
you don't have a part number for the Wahler OEM unit do you?
don't want to replace it yet, but got some time off end of the month, and it seams to be using more fuel than normal.
I've been looking at the cleaning the intake manifold as well when i take it off, the milage is just up to 98000 does anybody have any tips or advice?
March 20, 2012, 05:31:01 PM #6
OE number 038151501AL
Wahler part no. 7372D
2016 Vauxhall Insignia Elite Nav in White 2.0CDTI Manual.
2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
March 20, 2012, 09:39:01 PM #7
cheers thank you :)
October 14, 2017, 03:52:18 PM #8
Quote from: Mirez on February 13, 2012, 11:07:50 PM
Hi and welcome to the forum! Did you read the cleaning post? If so that's more geared towards performance gains then your problem as you don't need to strip it down that far. The EGR valve can be replaced on its own in situ if you have good dexterity!

The oil is coming from blow-by (oil forced by the piston rings (which is perfectly normal btw)) which then enters the intake system via the turbo. The EGR valve contains a small valve that is moved by vacuum as the ECU dictates. The valve sits in a metal bush which allows it to slide with the vacuum. Over time the knarly gunk that builds up in the intake manifold erodes the bush which when coupled with the pressurised intake air allows oil vapour to pass between the valve and bush. Unfortunately at the bottom of the valve are two small holes which are designed to exhaust the displaced air from the valve but of course allows the oil to drain out as well and that'll be where your leak is originating from.



hello there do you still have the information on this oil/air separator you fitted to your galaxy?
There aren't a lot of options open in terms of a simple fix, you can't block the holes as the valve will just stick in the up position (bad!) and there are no serviceable parts inside the EGR so you can't replace the bush. You can replace the EGR valve in its entirety but its not at all cheap or you can buy something called an "EGR delete kit" which basically does away with the EGR valve and replaces it with a strait through pipe - its debatable if that's strictly legal though although its quite common for people wanting more performance to do. The final option is to fit an oil/air separator to the car which will remove oil from the intake system so there's nothing to leak - this is what I have installed on mine however again its not cheap but at least fixes a number of issues in one hit :) I can provide more info if this is something you are interested in. The last option is to seal the holes are disable the EGR system by disconnecting the vacuum pipe and plugging it, again its not technically legal to disable an emissions system though albeit its unlikely to ever be discovered :)

Finally though whilst my mentality is "it shouldn't do that, fix it" this is a cosmetic inconvenience rather then anything else, you will be loosing such a small amount of air that there will be no performance problem and other then the oil being visible as a leak its not something to worry about :)
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