EGR Removal, MOT??

[mustbemuddy]

Hi all, removed the EGR from my 300tdi today and fitted blanking plate along with new modified top hose, but deos the EGR removal effect the vehicle on MOT?? also the plug which was on the egr is now unplugged obviosly, deos this have any bad effects on the engine long term?

Many thanks

[bilge rat]

no and no , neither of mine have egr valves . not had a prob yet but have kept it . & it doesnt make a difference to the emision test

[LEE7]

Hi
Removed mine 2 weeks ago but kept it, just in case.

It drives like a different, much better car.

Well worth doing IMO.


Regards.


Peter.

[mustbemuddy]

Yea, i definatly noticed a difference when i took it out after id fitted it, seemed to pick up batter and generally run abit smoother.

[Tom Mepham]

Mines coming off as soon as I get the bits, ordered a removal kit Thursday so should get it early next week.
What have you all done about the open end on the break vacuum hose?
I’ve ordered a new break vacuum hose to suite a non-EGR equipped tdi, the existing rubber hose looks a bit perished. I thought it wouldn’t be such a bad thing to replace it anyway when you thing about what job it dose!
New hose is £17 from a main dealer.
Tom

[LEE7]

Hi
The large soft end of vac hose at the valve end?

Bent it over & taped it up.

No worries.


Peter

[mustbemuddy]

i bourght the complete kit, comes with the egr blanking plate and a replacment hose which deosnt have the y section for the egr. kit was £23 off ebay, thats the 5mm thick one.

[norevik]

hi
i bought only the blanking plate, as i have a silicon tube from the intercooler to the engine. but didnt get instructions on where to fit the plate. does it bolt onto the top of the turbo? anybody got any pictures?

yours
newbi to disco

[LEE7]

Hi

Plate bolts to the manifold where the valve sits/sat.

Regards.

Peter

[norevik]

Hi

Plate bolts to the manifold where the valve sits/sat.

Regards.

Peter

hi

thanks for your answer.

yours
norevik

[Tom Mepham]

Right, I Hacked the EGR off my 300 yesterday, bolts came undone ok with some WD40 on them- Punched a jubilee clip as one came undone, not nice! Anyway I have noticed a difference with out it, there seems to be a bit more Grunt available at around 1500rpm, it pulls much better on an incline in 5th gear at around 40mph. Hopefully I will get some better MPG figures now. I have got 35.5MPG to beat, that was my best before removing the EGR.
Tom

[thebiglad]

Right, I Hacked the EGR off my 300 yesterday, bolts came undone ok with some WD40 on them- Punched a jubilee clip as one came undone, not nice! Anyway I have noticed a difference with out it, there seems to be a bit more Grunt available at around 1500rpm, it pulls much better on an incline in 5th gear at around 40mph. Hopefully I will get some better MPG figures now. I have got 35.5MPG to beat, that was my best before removing the EGR.
Tom


Hi Tom, I've done a couple of mods that might interest you:

1. De-EGR inc new top hose - afterwards she climbs hills better and generally runs slightly better and a bit better on juice:

2. De-Catt the exhaust downpipe - I did this as the original catt isn't really anything more than a filter, which blocks up over time. I bought a Defender non-cat solid pipe, £21.25+vat from Paddocks.

After fitting the turbo spins up MUCH quicker (you can hear it so drive to it) and from lower revs, boosting low speed torque. If I were to do this again I think I would spend more and get the Diso version which has a flexy section - I feel there is a little more NVH than before the mod.

However changing to the non-cat pipe has made a REALLY noticeable difference in performance. I find now that I'm getting 33-34 mpg daily and my best ever is now 39 mpg !!!!.

However the temptation is to use the extra performance and for the first week after the mod I was revelling in overtaking cars, flying (??) up hills etc. Now I've settled down again and I think the mpg will continue to climb.

3. I took off the viscous fan and replaced it wilth - nothing !!!

She remains at about one third on the temp gauge all the time - ambient temps 36°, towing etc. I'm not usually stuck in traffic, so always have a flow of air through the rad, but just in case I carry the fan with me as it only takes 30 secs to put it back if needed.

I reckon the benefit equates to 2mpg and it costs nothing other than your vigilence checking the header tank level REGULARLY.


Cheers
Dave

[mustbemuddy]

Only problem with decat pipe is that it is an MOT issue as far as im aware :(

[TEMPL4R]

It's not a Cat and it isn't a problem as long as it passes the smoke test.

A Cat isn't a requirement in an emmissions test either, it just has to pass the test.

Chris

[alfapat@dsl.pip]

Ok I have read your thread with enthusiasm, I was expecting a reply about my egr probs on my new purchase , but maybe This is the answer as a everyone here is admitting to no go at low revs, I feel I have to wind up the power all the time.
By the way is this thread related to the td5 BM ENGINE? Its a 51 plate td5.

[thebiglad]

Only problem with decat pipe is that it is an MOT issue as far as im aware :(

With diesel-engined cars (unlike petrol ones) you don't have to have a cat, you just hsve to pass a smoke test.

Dave

[TEMPL4R]

It's not a Cat and it isn't a problem as long as it passes the smoke test.

A Cat isn't a requirement in an emmissions test either, it just has to pass the test.

Chris ( MOT Tester)

[Tom Mepham]

thebiglad
Some interesting MPG you have had there, even more interetsing with the price of bloody diesel these days! I'v got the egr removed like you say and I ordered a de cat pipe yesterday along with a center silencer removal pipe. As soon as those bits arrive I shall fit them an see how we go then, as you said I will probably spend the first week thrashing the nuts off it! Some say I do anyway, I did have a burn up with my mate in his Rover 25 1.416valve- Disco came out on top on a hill!!
Tom

[thebiglad]

thebiglad
Some interesting MPG you have had there, even more interetsing with the price of bloody diesel these days! I'v got the egr removed like you say and I ordered a de cat pipe yesterday along with a center silencer removal pipe. As soon as those bits arrive I shall fit them an see how we go then, as you said I will probably spend the first week thrashing the nuts off it! Some say I do anyway, I did have a burn up with my mate in his Rover 25 1.416valve- Disco came out on top on a hill!!
Tom

Hi Tom, I know most people have a bit of difficulty with our mpg figures, but both the 200 and the 300 auto deliver imo great mpg, for what they are !!

Getting good mpg from a car is a bit like adopting a new philosophy, it has to permeate every aspect of your life for it work.

And so with improving the mpg of a vehicle, the approach needs to encompass both the running efficiency of the car and, very importantly, the driving style.

Please forgive me if you think I'm going off on one, but it REALLY IS possible to get good mpg from a Tdi Disco, just by using the following approach:

The vehicle:-

1. Air filters are crucial to Diesel engine performance. I don't pretend to know fully why this is, I just know it is. For example, two days ago I put a new airfilter in the wifes 200, which according to my records had been changed previously one year ago but only about 5000mls.

The car now runs quieter, smoother and just "happier" somehow - I'd left it for too long.

For the Tdi300 it's possible to buy airfilters for about £3 a piece, so I get 3 at a time, why wouldn't you at that price?

Some of the filters I've taken out of friends cars are just unbelievable, they should be on display somwhere they are so clogged, dirty & dreadful.

2. Oils - all the oils in my cars are synthetic, ie engine, gearbox, transfer box & axles. The more I can reduce friction in a drivetrain like a permanent four wheel drive Disco (real energy-sapper!!), the better. Yes it costs more, but it protects the parts, gives smoother performance and helps with mpg.

And if you really want to, you can increase service intervals.

3. Tyres that are underinflated each juice. Check them regularly and if in doubt, put them at a couple of psi above the reccomended;

4. Brakes - if any of the calipers are seized or partially they will drag and again eat juice. Change the pads regularly so that the pistons never poke out too much and get cruddy.

5. Include any well-known mods, like with LR diesels, the EGR & de-cat thing.


The driver:-

1. for the most part change gear at about 2500rpm, it's within the turbo operating range and is an efficient time to change up as you go into the next gear at about 2000rpm, just as the turbo is picking up and max torque is available.

2. A Disco weighs roughly 2100 kgs and is powered by, depending on model, 111 - 135bhp. This is NOT going to give car-like performance. Accept this and you're halfway to mpg bliss !!

3. Look ahead in the distance & anticipate the road conditions. Back off when you see a speed restriction sign/red traffic light/blockage in the road - by the time you get there, it could have cleared and you keep rolling.

Always remember that the vast majority of the fuel we use is to increase the velocity of our cars - if we can avoid some of that need we save money.

Every time you brake, you have wasted fuel. WHY? Because you didn't anticipate the need to reduce speed just by taking your foot off, earlier. I'm obviously NOT talking about emergency braking to avoid an accident !!

4. Considor taking a course of instruction with you local Advanced Motorists section. You will learn to drive safer, more efficiently AND get a discount on your insurance !!!


OK ok, that's enough from me, you get the idea. But when fuel is the price it is today, our cars need to learn to sip, rather than gulp.

Cheers all and good luck out there

Dave

[Tom Mepham]

Dave, all of those things are part of it, mine is a manual which I like, I can take full advantage of the fantasic grunt that these engines have.
Bolts holding down pipe to manifold are being resistant to coming undone at the moment, no great suprise! Been soaking it all in release oil, my Exhaust pipes should arrive today, so hopefully i'll get them fitted with in a few days.

[thebiglad]

Dave, all of those things are part of it, mine is a manual which I like, I can take full advantage of the fantasic grunt that these engines have.
Bolts holding down pipe to manifold are being resistant to coming undone at the moment, no great suprise! Been soaking it all in release oil, my Exhaust pipes should arrive today, so hopefully i'll get them fitted with in a few days.


Hi there Tom, I found that when I did mine, they came off quite easily when I undid them from underneath, using two extensions, a socket & driver.

Good luck

Dave

[V8_Disco]

Ok I have read your thread with enthusiasm, I was expecting a reply about my egr probs on my new purchase , but maybe This is the answer as a everyone here is admitting to no go at low revs, I feel I have to wind up the power all the time.
By the way is this thread related to the td5 BM ENGINE? Its a 51 plate td5.

No this Thread is mainly about the 200/300 Series Disco 1, However some people claim good proformance from removing the EGR from TD5s, However the Disco 2 TD5 engine is a Land Rover engine not BMW, In fact the Disco 2 was the Last Model to have wholey Land rover/Rover engines with the TD5 and the 4.0 V8, Unless you concider the Defender changes to denote differnt models

Aidan

[Tom Mepham]

Thats how i'd planned to tackle it dave, been soaking it still in WD40. Weather been so rubbish here I can't get very interested in the job at the moment.
All the pipework arrived this afternoon, I need to do a little fabrication to the stainless silencer removal pipe i'v got, it has a flange on the end that connects to the tail pipe- but my exhaust system has a sleeve with a U Bolt. Will be ok just got some stainless mig wire on Ebay!
Also I'v removed the EGR on our Td5, much better without it!
No more black gunk on the Manifold pressure sensor.
Tom

[alfapat@dsl.pip]

No this Thread is mainly about the 200/300 Series Disco 1, However some people claim good proformance from removing the EGR from TD5s, However the Disco 2 TD5 engine is a Land Rover engine not BMW, In fact the Disco 2 was the Last Model to have wholey Land rover/Rover engines with the TD5 and the 4.0 V8, Unless you concider the Defender changes to denote differnt models

Aidan

Many thanks for your reply so apart from fitting an EGR blanking kit specific to a td5 , is the answer then to get the engine re managed as its pretty poor at delivering initial take off , it seems to die unless you take it to 2500 then change quickly to catch it.

[alfapat@dsl.pip]

I have now ordeed a EGR removal kit so rather than wait to see a response I will let you know how I get on.

[mustbemuddy]

Many thanks for your reply so apart from fitting an EGR blanking kit specific to a td5 , is the answer then to get the engine re managed as its pretty poor at delivering initial take off , it seems to die unless you take it to 2500 then change quickly to catch it.

I know the TDI's are like this on discoverys, you have to go to atleast 2500rpm before changing up. the egr deos make a noticable difference though. Also considering decat pipe.

[thebiglad]

I know the TDI's are like this on discoverys, you have to go to atleast 2500rpm before changing up. the egr deos make a noticable difference though. Also considering decat pipe.

De-catting the exhaust pipe makes a really big difference to the initial take-off especially - don't know if this would apply to Td5.

Sorry for the crap typing, had a bit of a beer-up tonight - EXCELLENT !!

[alfapat@dsl.pip]

Thanks for your response guys , hope I can change everthing over when it comes.Anyone no of any pitfalls I might encounter before I commit myself. Do they come with instructions or are they online in the forum , well I mean more intense ones other than whats in the forum?

[mustbemuddy]

Not sure on TD5, easy job on the TDI 300, think TD5 will be abit more of a job as it is all hidden away :(

[alfapat@dsl.pip]

Oh really! Just my luck , has anyone on this forum done the job on a td5 then please?

[Tom Mepham]

Yep, I'v removed the EGR on our Td5, easy job, possibley easyer than a Tdi! You need to get a kit to do the job, I got ours from JGS 4x4 on Ebay. Consisting of a stainless tube, a gasket, a blanking plate and gasket amd some little blanking plugs for the vacume hoses. The Kit from JGS 4x4 comes with full instructions so if you at all unsure about what to do you can easily find out. http://cgi.ebay.co.uk/Land-Rover-Discovery-2-TD5-EGR-Removal-Full-Kit_W0QQitemZ250272963777QQcmdZViewItem?_trksid=p3 286.m20.l1116
There are pictures of where and and what your removing on the Ebay page. There is only 3bolts holding the Plastic cover on the engine, fish it off and have a look for a start!
Oh and is it better with out?
Yes! Ours is a manual and it pulls better at lower RPM, can do 40mph up hill in 5th gear better. Less RPM- less fuel burnt! Also no more black gunk on the MAP sensor, recomend cleaning that at the same time.
Tom

[alfapat@dsl.pip]

Many, Many thanks for your reply you have given a good deal of confidence in what I am doing, yes its from JGS so also has instructions, just arrived to day. NOW DO i wait till mot in a MTH OR HAS IT REALLY NO EFFECT ON IT?

[Tom Mepham]

Well, as far as I am aware it will be fine, you do not need to have an EGR fitted to pass an MOT. As long as it passes the Emissions test it will be fine, you are given pretty large margins to comply with at MOT compared with manufacturers when they produce a new vehicle. There is part of the EU emissions laws that says as a manufacturer you can't produce a diesel engine with out an EGR valve which is why they are fitted.
The EGR is to lower the amounts of Nitrogen oxide in the exhaust gas, I’m not even sure that the MOT emissions test even measures the levels of this gas.
Do you know about cleaning the MAP sensor on the inlet manifold on td5?
It’s a little sensor just in front of the EGR valve, with two bolts securing it and a wire on it.
Tom

[alfapat@dsl.pip]

no I don't can you enlighten me , just in case, please.

[kielderman]

Specialist garage told me you only need to unplug cable at egr valve ! thats what his mechanics do to there discos.
last discovery i fitted kit this time just unpluged it.
I was told the valve will only open if 12volt dc is applied to it via the sensor on top of ip,thats how it works.
Take the manifold off and clean out the gunk he said,they get messy.
my local mot station said the cat would have to be in good condition if fitted,but if not there its not a problem as long as the emissions pass.

[thebiglad]

Specialist garage told me you only need to unplug cable at egr valve ! thats what his mechanics do to there discos.
last discovery i fitted kit this time just unpluged it.
I was told the valve will only open if 12volt dc is applied to it via the sensor on top of ip,thats how it works.
Take the manifold off and clean out the gunk he said,they get messy.
my local mot station said the cat would have to be in good condition if fitted,but if not there its not a problem as long as the emissions pass.

I find that a very amateurish approach. There are two main problems with the EGR system as a whole.

1. They are supposed to operate on light throttle only - isn't that what most of us drive around on for most of the time??

2. Even when they operate correctly, they still pump back into the inlet manifold all kinds of black marmite-looking tar - now that just cannot be good for an engine. The trouble is often the DON'T work properly so the valve is pemanently open and chucking rubbish into the engine all the time.

You have to wonder what is the actual benefit to you, the driver, of such a rubbish system. The car runs better, cleaner and more economically without it, the mot tests are not adversely affected.

All motor manaufacturers bang on about the need for carefully filtered air only, entering into your precious engine, but they don't tell you that they've incorporated a system that will pump all that crap in there, without you ever knowing.

Once you've taken an EGR valve apart you will NEVER want another one on any of your vehicles again.

Cheers

Dave

I would never use a garage that thinks so tunnel-visioned as this one.

[Tom Mepham]

The thing with the Td5 EGR unit is that the valve block its self is quite a restriction on the air intake. Also the later Td5 EGR unit has a flap it can shut to create more vacuum on the exhaust intake, so it literally sucks in the crap! We took ours off and replaced it with the strait pipe as part of the kit from JGS 4x4. The induction noise is slightly louder now, which is some indication of the effect the EGR unit has on the air flow.
The black gunk as discussed gets all over the Manifold Absolute Pressure/Inlet Manifold Temperature sensor and subsequently causes a loss in performance. This sensor basically detects negative pressure in the manifold when you accelerate and tells the ECU to open the waste gate on the turbo and pressurise the manifold.
With black gunk on it dose not detect the change in pressure so well and basically the engine dose not seem so sharp. I have attached a pic of what it looks like, look on the manifold and you will find it.
Just clean it with some break cleaner and a bit of cloth and re-fit, very simple!
Tom

[alfapat@dsl.pip]

Many thanks, next quite moment I will be fitting this kit so will keep posted.Cheers Pat

[mustbemuddy]

Got told today that on the 300tdi, when removing the egr system, you must unplug 2 other sensors to get any improvment or mpg, apperntly tehres one on the fuel pump and one on the intake, is this true. I was told that if you just remove the egr valve then it makes your mpg drop to 18-20 :eek:

Any truth in this peps :confused:

thanks

[thebiglad]

Got told today that on the 300tdi, when removing the egr system, you must unplug 2 other sensors to get any improvment or mpg, apperntly tehres one on the fuel pump and one on the intake, is this true. I was told that if you just remove the egr valve then it makes your mpg drop to 18-20 :eek:

Any truth in this peps :confused:

thanks


I must be honest I hate to hear this sort of thing. It's just not specific enough.

Lesson one, there are two types of pump on the Tdi 300 range, one manual and one semi electronic (EDC)

On the manual ones there is a vacuum connection on top of the EGR valve as well as an electrical connection. When you remove the EGR valve, by definition you have disconnected both of these contacts. Block the vacuum tube, tidy up the electrical out the way and bob is your proverbial.

On the EDC ones there is no electrical connection on the EGR valve, only a vacuum pipe (that's how it was on my '98 anyway).

I disconnected the vacuum tube, blocked it off, blocked off the EGR valve and, just out of interest, I filled up today, 100 euros:eek: and the mpg in mixed usuage came out at 33mpg - including 20% towing !!!

They're talking b0llocks my friend, don't trust 'em again.

Cheers & good luck

Dave

[Tom Mepham]

Yer I’m not sure about the EDC controlled 300tdi's, I am lucky I think, mine is one of the last "proper" mechanical controlled tdis. There was a thread on here somewhere that talked about problems with EDC and removing the EGR. Mine has a throttle position sensor on the pump but this makes no difference to the fuelling, it is just used by the EGR ECU to calculate engine load and how much Exhaust to let by. I’v not got any new MPG figures yet but I will have to fill up early next week and I’ll see if there is any difference.
There might just be a wiff of bull**** about what you have been told.
Tom

[mustbemuddy]

Mine has the electrical connection, havnt blocked of the vacum pipe though. :(

[thebiglad]

Mine has the electrical connection, havnt blocked of the vacum pipe though. :(


My understanding was that the EGR was opened by the vacuum and the electrical connection was there to tell the ecu what was happening. Tdi 300 related.

Assuming that is correct, you have not stopped the valve opening and shutting so you'll still get black crap in your inlet manifold.

Dave

[mustbemuddy]

This is the tiny little pipe off the egr valve ?? runs from egr to down near airbox somewhere :confused: whats the best way of blocking it off, bit off silicone in the end or a little self tapper?

thanks

[thebiglad]

This is the tiny little pipe off the egr valve ?? runs from egr to down near airbox somewhere :confused: whats the best way of blocking it off, bit off silicone in the end or a little self tapper?

thanks

That's the one, I blocked mine off with a self-tapper, never had any issues since.

Cheers
Dave

[Tom Mepham]

Short bit of heavy galvanised fence wire made quite a good job on our Mitsubishi van. I put a tiny hook on the end so I could get it back out if needed.
Tom

[cliffTD5]

The thing with the Td5 EGR unit is that the valve block its self is quite a restriction on the air intake. Also the later Td5 EGR unit has a flap it can shut to create more vacuum on the exhaust intake, so it literally sucks in the crap! We took ours off and replaced it with the strait pipe as part of the kit from JGS 4x4. The induction noise is slightly louder now, which is some indication of the effect the EGR unit has on the air flow.
The black gunk as discussed gets all over the Manifold Absolute Pressure/Inlet Manifold Temperature sensor and subsequently causes a loss in performance. This sensor basically detects negative pressure in the manifold when you accelerate and tells the ECU to open the waste gate on the turbo and pressurise the manifold.
With black gunk on it dose not detect the change in pressure so well and basically the engine dose not seem so sharp. I have attached a pic of what it looks like, look on the manifold and you will find it.
Just clean it with some break cleaner and a bit of cloth and re-fit, very simple!
Tom

Thanks for this one :) Got rid of our egr the other week with the same kit as yours but had not cleaned this sensor.
Whipped it out tonight and it was quite gungy cleaned it all out with contact cleaner so heres hoping for a slight change.

Would be nice to give it a try but poor old D is being trailered in tomorrow for a new ACE pipe :rolleyes:

[alfapat@dsl.pip]

Also fitted my removal kit and blanked the egr off, cleaned the sensor and now notice a great difference especially in 4th gear! 1st and 2nd is much more responsive also , thanks to this site for this mod and info . Incedentally I enquired at local dealership about the cost of chipping and they proudly replied with a cost of £640 incl vat !!!!!!!!!!!!
I think not!

[Tom Mepham]

Glad it all worked for you alfapat, I get the impression some people think we’re full of bull ****!
One of the other little performance related problems I have experienced is the Fuel pick up strainer on the fuel pump in the tank can get dirty and restrict the flow. All that happens then is the power just seems to dry up when you start thrashing it.
Its always worth bearing in mind, the Td5 seems to be very susceptible to fuel blockage.
Tom

[alfapat@dsl.pip]

I'll maybe check that too Tom some time I have got a busy spell coming up at Harvest so maybe after that.
Many Thanks
Patrick

[disco44]

For a Aussie "dipstick" like me can someone post photos of the removal of the EGR's on a 300TDI please . It sounds to me to a very interesting removal particularity to performance and MPG

Thanks

[thebiglad]

For a Aussie "dipstick" like me can someone post photos of the removal of the EGR's on a 300TDI please . It sounds to me to a very interesting removal particularity to performance and MPG

Thanks


Hi Disco44, there are two basic ways of doing this
1. Remove the EGR valve and block off the hole in the exhaust manifold or, as I did;
2. Block off after the EGR valve and remove the old pipework.

I couldn't get the hex bolts undone on mine to remove completely the EGR valve so I did it as per the pictures, works just as good.

[mustbemuddy]

:confused: your egr layout is alot different to mine, what year is your disco? mines a 96, my egr valve is all 1, if i remove the pipe then i have to remove the egr valve, my exhasut manifold is different also, mine geos straight down instead on across like yours... wierd :eek:

[thebiglad]

:confused: your egr layout is alot different to mine, what year is your disco? mines a 96, my egr valve is all 1, if i remove the pipe then i have to remove the egr valve, my exhasut manifold is different also, mine geos straight down instead on across like yours... wierd :eek:

Mines' a '98 auto.

Dave

[disco44]

Hi Disco44, there are two basic ways of doing this
1. Remove the EGR valve and block off the hole in the exhaust manifold or, as I did;
2. Block off after the EGR valve and remove the old pipework.

I couldn't get the hex bolts undone on mine to remove completely the EGR valve so I did it as per the pictures, works just as good.

Thanks much appreciated......Have a safe trip ....Do you know that the K's on your trip to Morocco are the same as going across Australia east to west 5000 kilometers
Cheers
Disco 44 ( John )

[thebiglad]

Thanks much appreciated......Have a safe trip ....Do you know that the K's on your trip to Morocco are the same as going across Australia east to west 5000 kilometers
Cheers
Disco 44 ( John )

That's interesting - it's just a bit further away from my house:D:D

Cheers
Dave

[ScottTDI]

Nice bit of info here, thanks lads. :)

is there a how to thread or something simaler on how to remove the EGR valve?
I'm doing a search but its hard to search for EGR when the limit is 4 letters. lol

Biglad:=- your EGR location and pipe work is different to mine, i guess this is down to yours being a auto and 2 years newer?

[First 24]

Have a look here:http://www.difflock.com/magazine/Modifications/Remove_the_EGR_valve_-_Land_Rover_300TDi.shtml

[Mikey 110]

The thing with the Td5 EGR unit is that the valve block its self is quite a restriction on the air intake. Also the later Td5 EGR unit has a flap it can shut to create more vacuum on the exhaust intake, so it literally sucks in the crap! We took ours off and replaced it with the strait pipe as part of the kit from JGS 4x4. The induction noise is slightly louder now, which is some indication of the effect the EGR unit has on the air flow.
The black gunk as discussed gets all over the Manifold Absolute Pressure/Inlet Manifold Temperature sensor and subsequently causes a loss in performance. This sensor basically detects negative pressure in the manifold when you accelerate and tells the ECU to open the waste gate on the turbo and pressurise the manifold.
With black gunk on it dose not detect the change in pressure so well and basically the engine dose not seem so sharp. I have attached a pic of what it looks like, look on the manifold and you will find it.
Just clean it with some break cleaner and a bit of cloth and re-fit, very simple!
Tom

I presume it has some sort of gasket, is it anything special or can I just make one up?