Oil around EGR housing

[muddyboots]

if the holes are plugged the air leaking past the valve stem could (big could!) lift the diapham slightly and let the boost into the exhaust port, but it would have to be good blu-tac , perhaps a couple of bolts is not such a good idea after all I'll get me coat

Hmm, that theory holds....the blutack was pushed in quite firmly...

 

[muddyboots]

Ed is your ECU 15 or 16 I think 16 will turn on the warning lamp

I have a vague recollection that ECUs from MY04 onwards would work out whether the EGR was disabled, by the amount of air being sensed by the MAF (ie there would be more than expected).
Might be wrong with the year though.

 

[STEVEO@CYMRU]

anyone got a piccie of where this EGR valve is so i can let my mate know where to look

cheers

steveo

 

[sssstew]

see here :-

http://www.flickr.com/photos/vw_tdi/192839547/

back left, hover over and you will see. Its the small round silver capped item at the back left of the engine itself.

 

[mwragg]

Just read a couple of the EGR threads and I am seeing a very small amount of oil on the flange of the pipe where the EGR blanking plate goes ie the top of the pipe that routes the exhaust into the EGR/ASV housing:-

Prior to this I have fitted a blanking plate, but still got a CEL and could not be bothered to remove the plate so I am running with blanking plate and the EGR vacuum hose disconnected and plugged. Also I have bypassed the CCV by plugging the hole back into the inlet duct (just after the MAF) and then connecting a crankcase filter (which vents to atmosphere) to the hose which connects to the rocker cover outlet. Therefore, there should be no oil in my inlet and whatsmore, even if there was, it cannot escape via a possibly leaky EGR blanking plate because the EGR valve (with no vacuum) is permanently closed.

The other possibility is that the EGR blanking plate is leaking from the other (exhaust) side and allowing some exhaust gases to escape here, however, I cannot hear anything and why should the exhaust gases be oily?

Maybe my imagination, but the exhaust seems a little smokier than usual, although there has been no drop in power or torque. So, just where is this oil coming from? It is not a great amount, but I have cleaned it off with a piece of kitchen roll only to see it back the next day. Do you think that my CCV mod is possibly not letting the crankcase breathe enough and therefore oil is being pushed out somewhere else?

 

[cheshire cat]

I would mostly be concerned with the crankcase filter, restricting the breathing, it may not be the oil equivalent of hydrophobic and could well have mayonase in there too, I would get the engine up to temp then pull out the dipstick to try and gauge the c'c' pressure, if you are going to vent to atmosphere I wouldn't use any restriction, but it will create an oily mess p.s. don't forget the leakage from the turbo there will be some

 

[Jimski]

Well, im baffled!! Not used to the PD engines, and i have got this leakage from around the EGR, obviously its a steady build up but messy non the less!

Now i've heard utterings of Allard EGR delete, new EGR's, blanking plates etc, so any benefits? Disadvantages?

Can anyone explain nicely? lol


Jimski

 

[alx_chung]

Well, im baffled!! Not used to the PD engines, and i have got this leakage from around the EGR, obviously its a steady build up but messy non the less!

Now i've heard utterings of Allard EGR delete, new EGR's, blanking plates etc, so any benefits? Disadvantages?

Can anyone explain nicely? lol


Jimski

Not much of an explaination but cleaning the EGR would prob help as there might be a build up of gunk in it. Also gives you a chance to replace the seals and make sure everything is working fine. Cheaper option than getting a delete pipe in the first instance.
Alex

 

[muddyboots]

Well, im baffled!! Not used to the PD engines, and i have got this leakage from around the EGR, obviously its a steady build up but messy non the less!

Now i've heard utterings of Allard EGR delete, new EGR's, blanking plates etc, so any benefits? Disadvantages?

Can anyone explain nicely? lol


Jimski

Replace EGR with a delete pipe (eg Allard):
- no more sooty exhaust into your intake
- no more oil leaks
- slightly less restriction in your inlet
- will get a warning light all the time unless you've got quite an early PD (with earlier ECU)
- very obvious that you've modded the engine
- you'll lose your anti-shudder valve (ASV) which could mean the engine will shudder when it comes to a stop, plus in the unlikely event your turbo disintegrated and the engine starts running on it's oil, it could run away with itself and you've no way of stopping it until it revs itself to destruction.

New EGR:
- cure the oil leak
- won't cause a warning light
- no change in outside appearance
- still get sooty exhaust fumes into the inlet.

EGR blanking plate (basically you undo the exhaust pipe from the EGR, insert a blanking plate, and reassemble):
- no more sooty exhaust into your intake
- no difference to appearance
- won't fix your oil leak
- will get a permanent warning light unless you have an early ECU, or you drill a small hole in the plate to bleed a small amount of exhaust gas through.

EGR stealth pipe (basically you take an old EGR valve, block up the hole that connects to the exhaust, remove the internal butterfly flap, smooth it all out, reassemble):
- no more sooty exhaust into your intake
- no more oil leaks
- slightly less restriction in your inlet
- will get a warning light all the time unless you've got quite an early PD (with earlier ECU)
- no visible difference
- retains your anti-shudder valve


Think that sums the options up

 

[alx_chung]

Replace EGR with a delete pipe (eg Allard):
- no more sooty exhaust into your intake
- no more oil leaks
- slightly less restriction in your inlet
- will get a warning light all the time unless you've got quite an early PD (with earlier ECU)
- very obvious that you've modded the engine
- you'll lose your anti-shudder valve (ASV) which could mean the engine will shudder when it comes to a stop, plus in the unlikely event your turbo disintegrated and the engine starts running on it's oil, it could run away with itself and you've no way of stopping it until it revs itself to destruction.

New EGR:
- cure the oil leak
- won't cause a warning light
- no change in outside appearance
- still get sooty exhaust fumes into the inlet.

EGR blanking plate (basically you undo the exhaust pipe from the EGR, insert a blanking plate, and reassemble):
- no more sooty exhaust into your intake
- no difference to appearance
- won't fix your oil leak
- will get a permanent warning light unless you have an early ECU, or you drill a small hole in the plate to bleed a small amount of exhaust gas through.

EGR stealth pipe (basically you take an old EGR valve, block up the hole that connects to the exhaust, remove the internal butterfly flap, smooth it all out, reassemble):
- no more sooty exhaust into your intake
- no more oil leaks
- slightly less restriction in your inlet
- will get a warning light all the time unless you've got quite an early PD (with earlier ECU)
- no visible difference
- retains your anti-shudder valve


Think that sums the options up

What he said!
Think I might go for either the Delete pipe or option two with the smaller inlet on the plate.
Alex

 

[muddyboots]

My personal favourite option would be the EGR Stealth pipe (lots more info on TDIclub.com).
You'd either need to get hold of an old EGR and do the work yourself, or find someone who was willing to do it for you.
If you've got a more recent ECU, you could design it to include a small exhaust bleed hole to avoid the warning light issue.