My vrs's egr has sprung an oil leak and needs eventually replacing. So, do I use the slightly grubby but working spare I have, or get a delete kit?? What are the implications?? Any advice would be great!

I deleted one on a Mitsubishi Pajero, didn't really notice much difference just less smoke.

 

 However, it was fitted from new and must do something, try it without and any issues fit your old spare.

Just get rid, most people do.

Removed the pipe and blanked mine off. No change in the way the car performed just had the EML on the dash till it got mapped out.

Ateod the end of the day it's preventative maintenance.

Reduce gumming up of internals.

Reduce contamination or incoming air.

Reduce egts.

Small effect but most fail after a bit and just clog up!

Meant to say of Air, not sure if it effects cetane. In petrol it can reduce the octane levels slightly.

I have an egr delete and my engine wants to jump out the bay when I turn it off, might just put it back on, hasn't changed much

As the anti shudder valve is removed when doing this delete. unless of course you have a BLT engine, then you can get a seperate delete kit which retains the ASV.

Cant you just put a blanking washer in where the gasket goes?

That will just stop thw gasses wont it?

As the anti shudder valve is removed when doing this delete. unless of course you have a BLT engine, then you can get a seperate delete kit which retains the ASV.

It was my understand an asz engine didnt have an anti shudder valve? Only the blt.

I removed mine on my pd100 and i cant say the shudder is worth complaining about. Its not bad at all.

Although worth noting that on a blt engine, it would bring up the eml light and they would need mapping out.

the asz has one, its in the EGR section, there is a piston thing in the centre of it then at the beginning there is the valve.

 

hope that makes sence lol

I have an EGR delete on my Fabia which has an ASZ engine code. Good points are it's not getting all clogged up with crap and the car is noticeably smoother to drive at low revs. Bad points are it shudders when switched off and the engine light is on but that just needs the map tweaking.

the asz has one, its in the EGR section, there is a piston thing in the centre of it then at the beginning there is the valve.

hope that makes sence lol

So its all part and parcel of the same part?

If you just blank it off using blanking plates you retain the anti shudder.

Yes mate the egr and anti shudder is all one part.

Isnt the anti shudder the part that throws the eml?

Might be an idea to just blank off the small pipe from the exhaust/turbo to egr.

Must be easy enough?

I don't think my egr made a blind bit of difference and I do hope to restore it for this winter as the egr will heat the engine up quicker and so in theory improve emissions by shortening warm up time.

I think the elephant mod is better because it stops the vapours entering the system and of course if your egr is in place it mixes the sooty exhaust fumes with vapour and you get the thick sludge. Just exhaust gas alone is going to be drier.

EGR works to reduce NOx emissions by reducing temperatures in the combustion chamber. So if it were used during warm-up (which I doubt anyway), it would lengthen warm-up times, wouldn't it? 

depends what year and where it's leaking

I wasn't thinking when I posted that..I don't think the egr opens til the car has warmed up. Forgive me but how does it reduce combustion temperatures? The exhaust air comes out of the turbo/manifold and when the valve is opened goes straight into the intake? Unless of course the compressed air inside the cylinders is at much higher temperature than the exhaust gas..Hmm scienceyyy!

Doesnt cool

It basically reuses used gases so less goes out the back making it less bad gas put each cycle.

Nothing to do with cooling. Exhaust gas has unburnt stuff in so engine needs to be running hot to burn it off.

Hope that makes sence?

EGR?  wossat?  

 

I've not run one for YEEEAAARS....  This was the pipe that replaces the EGR when I last checked after many tens of thousands of miles....  OMG, a little drip of oil.....

 

 

and then compared to what having an EGR can lead to..... 

 

I wasn't thinking when I posted that..I don't think the egr opens til the car has warmed up. Forgive me but how does it reduce combustion temperatures? The exhaust air comes out of the turbo/manifold and when the valve is opened goes straight into the intake? Unless of course the compressed air inside the cylinders is at much higher temperature than the exhaust gas..Hmm scienceyyy!

By reducing the amount of excess oxygen in the cylinders, replacing it with inert exhaust gases.  At the temperatures and pressures in an internal combustion engine, even the nitrogen in the air gets burnt a bit if there's lots of excess oxygen, leading to the poisonous nitrogen oxides (Mostly NO and NO₂, usually abbreviated to NOx.

 

This page gives a reasonably readable and balanced summary of what happens.  There are disadvantages such as increased particulate emissions and the obvious clogging of valves and manifolds.

 

For those that won't click, here's a quote with the gist:

 

"A widely adopted route to reduce NO_x emissions is Exhaust Gas Recirculation (EGR). This involves recirculating a controllable proportion of the engine's exhaust back into the intake air. A valve is usually used to control the flow of gas, and the valve may be closed completely if required.

 

The substitution of burnt gas (which takes no further part in combustion) for oxygen rich air reduces the proportion of the cylinder contents available for combustion. This causes a correspondingly lower heat release and peak cylinder temperature, and reduces the formation of NO_x. The presence of an inert gas in the cylinder further limits the peak temperature (more than throttling alone in a spark ignition engine).

The gas to be recirculated may also be passed through an EGR cooler, which is usually of the air/water type. This reduces the temperature of the gas, which reduces the cylinder charge temperature when EGR is employed. This has two benefits- the reduction of charge temperature results in lower peak temperature, and the greater density of cooled EGR gas allows a higher proportion of EGR to be used. On a diesel engine the recirculated fraction may be as high as 50% under some operating conditions."

 

[my emphasis].

Jase, thats just poor maintenance lol.

Mine hadnt beedncleaned till I did it last year and it was pritty bad. Makes a big difference when cleaned.

Removing the EGR valve WILL reduce the life of your turbo, it WILL increase fuel consumption during lean cruise conditions and it WILL increase toxic NOx emissions.

 

Removing the EGR valve WON'T increase performance.

 

Keep your EGR system clean and well maintained and do the elephant mod to keep it that way.

 

Only VERY highly tuned cars don't work properly with the stock EGR system so it has to be mapped out, very highly tuned means big turbos and bigger injectors, usually those cars running well above 200bhp.

 

Don't do dumb mods if you have no idea why you're doing them other than because you can!

Hi Lukeanderson31,

I have a 2004 1.9tdi ATD engine Elegance. Do you think this Egr delete is worth it on the car we drive as nearly all the posts are concerning Vrs models.

Regards,

John42