Egr Blanking Mod

gemsdad said:

hi S M,glad you agree its a good thing to do,some people just think its a load of hot air,(which it is i suppose),i found my rover 75 cdti to be a lot more pleasurable to drive with this mod,no hesitation on take of at roundabouts etc,better mpg and more powerful as well.

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Definate difference, the car is smoother all round. Had been thinking of replacing it, but will keep it for a few more years now.
Don't know much about the technical bits of increased air flow, but I'd say it's worth fitting to keep all that filth out of the manifold, it looked like thick Bovril when it came out!!
One side effect is Mpg has gone up by around 3 Mpg so the mod should eventualy pay for itself which can't be bad value.

Skinny Mike said:

and blocked the vacuum hose. The engine is alot smoother and back to how it used to react when we got it.

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gemsdad said:

just to say my egr valve was more like the second pic more than the first pic and it did make a big difference to the engine performance.

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ming said:

OK Earthlings. . . . . . . .Update of how i found the td4 after the blank mod. . . . .so thought i would monitor it over time and my own conclusions are ,better response at low revs, seems smoother over all less smoke on kick down, MPG=the same really 0-60=bout the same , OK to cut to the chase is it worth doing. . . .yes the actual system is a crap idea and after say 20,000miles it will defo clog up your inlet and as such will impair the engines breathing,it is not gonna give you rockit response but you do notice a better low down feel

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So this is the reality of the EGR mod, it restores lost performance that has diminished over time due to restriction from the build up of carbon. Your Freelander will undoubtedly feel better/more responsive to drive whether you replace the valve or not.
The claims of massive power improvement over a clean stock valve are unfounded.

Chaser said:

So this is the reality of the EGR mod, it restores lost performance that has diminished over time due to restriction from the build up of carbon. Your Freelander will undoubtedly feel better/more responsive to drive whether you replace the valve or not.
The claims of massive power improvement over a clean stock valve are unfounded.

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Hello there Chaser

Would you agree if you are going to replace the valve, then you might as well get the pass through ( they both seem to be roughly the same price, off EB ), so as to reduce sludge build up in the manifold, which even to my pee sized brain does'nt seem like healthy stuff to have in there.

Skinny Mike said:

Hello there Chaser

Would you agree if you are going to replace the valve, then you might as well get the pass through ( they both seem to be roughly the same price, off EB ), so as to reduce sludge build up in the manifold, which even to my pee sized brain does'nt seem like healthy stuff to have in there.

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The thing is if you disable the EGR valve after cleaning it it can't open and allow any exhaust gas through so you won't get any more sludge in the inlet so the problem doesn't return.

Chaser said:

The thing is if you disable the EGR valve after cleaning it it can't open and allow any exhaust gas through so you won't get any more sludge in the inlet so the problem doesn't return.

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Oh well it looks really shiny

Skinny Mike said:

Hello there Chaser

Would you agree if you are going to replace the valve, then you might as well get the pass through ( they both seem to be roughly the same price, off EB ), so as to reduce sludge build up in the manifold, which even to my pee sized brain does'nt seem like healthy stuff to have in there.

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Correct me if I'm wrong but I think the air you get in through such a bypass tube is as oily as the air coming through via the original egr housing (with the vacuumpipe blocked) since the outlet of the engine breather valve is before this, in other words the composition of the air is the same and the only difference is that with the bypass tube there is nothing where the oily substances in the air can stick on where in the original egr-housing (with the vacuumpipe blocked) the oily bits in the air can stick on the middle axe and the bit of the valve sticking into the housing, as it is visible on these parts people seem to think with the bypass there is nothing of oil in the air and thus the manifold is and stays clean. The difference of a blocked valve and an operating valve is that with a blocked valve the oily air does not get burned by the hot exhaust air and remains oily where with an operating valve the hot exhaust air comes, under certain circumstances, through the valve and makes the oily subtances in the air get carbonised and this results, over the years/miles, in a clogged up inside of the valve.

titter.... I guess i just don't like the thought of peeps spending nearly 50 quid on something when they can have practically the same result for free....

Chaser said:

titter.... I guess i just don't like the thought of peeps spending nearly 50 quid on something when they can have practically the same result for free....

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Any idea how do we clean the my existing EGR valve?Any gasket replacement required and is brake cleaner aerosol works?

Cleaning is a doddle, the crap is fairly soft and oily. Scrape out the worst then use your brake cleaner spray.

You can reuse the 'o' ring seal at the manifold joint and make sure you wipe any oil from the end of the inlet hose before refitting or it can blow off under pressure.

Leave off and plug the vacuum hose it you haven't already.

Really surprised that people are still debating this when so many of us have fitted the bypass & found it to be a good improvement for little money. The old block the vacuum pipe & clean the egr will provide a small improvement at lighter throttle settings. Fitting the bypass provides a much more noticeable improvement across the range. I know, cause I've done it. Now you guys go do it, then post your results.

mikeong said:

Any idea how do we clean the my existing EGR valve?Any gasket replacement required and is brake cleaner aerosol works?

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Poured chocolate all over mine, it came out a treat !

Seriously, used parafin to clean mine, left it soaking for about 15mins, then gave it a good scrub with an old toothbrush, then rinsed and all clean as a whistle.

Chaser said:

So this is the reality of the EGR mod, it restores lost performance that has diminished over time due to restriction from the build up of carbon. Your Freelander will undoubtedly feel better/more responsive to drive whether you replace the valve or not.
The claims of massive power improvement over a clean stock valve are unfounded.

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have you driven one without the EGR valve removed,if not try it,if yes it must just be a ****e car.

gemsdad said:

it has been worked out by the people that make the mods

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gemsdad said:

Be interesting to see their calculations. I hope they took into account the twists and turns of the manifold and the impedance of the intercooler before suggesting a 40% increase in airflow.

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There is a seller on eBay claiming a bypass gives up to 10bhp. Compared to what??

I can only say what I have experienced, as I’m sure will others.
Following Mings thread my EGR valve was removed, cleaned and the vac pipe was plugged to disable EGR and I immediately felt the difference in throttle response as reported by others so there appears to be a small improvement in torque at very low rpm but once above about 2000rpm there was no real change apart from the fact that there was less hesitation when the throttle was increased.

Later when doing some other maintenance I removed the inlet manifold and cleaned the inside as Ming had done because having seen inside when cleaning the EGR valve It just didn’t seem right to leave it like that. Satisfying as it was to know it’s all clean there was no ‘noticeable’ change to the way the car performed.

Likewise when I then decided to go for the Bypass there was no ‘noticeable’ change in performance at all anywhere in the rpm range so my opinion is based on doing it in those three stages.
EGR only operates at small throttle openings and it seems to me that disabling it along with cleaning and ensuring the valve itself was sealing gave me the most benefit.


10 bhp! Not in my case.

Chaser said:

There is a seller on eBay claiming a bypass gives up to 10bhp. Compared to what??

I can only say what I have experienced, as I’m sure will others.
Following Mings thread my EGR valve was removed, cleaned and the vac pipe was plugged to disable EGR and I immediately felt the difference in throttle response as reported by others so there appears to be a small improvement in torque at very low rpm but once above about 2000rpm there was no real change apart from the fact that there was less hesitation when the throttle was increased.

Later when doing some other maintenance I removed the inlet manifold and cleaned the inside as Ming had done because having seen inside when cleaning the EGR valve It just didn’t seem right to leave it like that. Satisfying as it was to know it’s all clean there was no ‘noticeable’ change to the way the car performed.

Likewise when I then decided to go for the Bypass there was no ‘noticeable’ change in performance at all anywhere in the rpm range so my opinion is based on doing it in those three stages.
EGR only operates at small throttle openings and it seems to me that disabling it along with cleaning and ensuring the valve itself was sealing gave me the most benefit.


10 bhp! Not in my case.

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Nicely put Chaser.

Hi All,
Got our FL1 06 TD4 18,000 mls in October, checked EGR and it was only 'half way' mucky.
Following Ming's thread I cleaned and replaced the EGR and blocked the exhaust inlet with a steel disc.
We both noticed an improvement in pick up and apparent power. (it's SWMBO's Motor)
I have now fitted the EGR bypass and the difference is again another noticable improvement, better pick up and better pulling - we now have fitted a towbar and it's been towing the Pikey wagon.
Also switched to fully synthetic oil as we intend to keep the FL for a good while.
Mileage is still in the low 20k's so our observations (all subjective) are representative of effects on a lowish milage TD4.
Bit more observation/data for the pot - I would certainly do it again on another TD4.
TD John

Chaser said:

There is a seller on eBay claiming a bypass gives up to 10bhp. Compared to what??

I can only say what I have experienced, as I’m sure will others.
Following Mings thread my EGR valve was removed, cleaned and the vac pipe was plugged to disable EGR and I immediately felt the difference in throttle response as reported by others so there appears to be a small improvement in torque at very low rpm but once above about 2000rpm there was no real change apart from the fact that there was less hesitation when the throttle was increased.

Later when doing some other maintenance I removed the inlet manifold and cleaned the inside as Ming had done because having seen inside when cleaning the EGR valve It just didn’t seem right to leave it like that. Satisfying as it was to know it’s all clean there was no ‘noticeable’ change to the way the car performed.

Likewise when I then decided to go for the Bypass there was no ‘noticeable’ change in performance at all anywhere in the rpm range so my opinion is based on doing it in those three stages.
EGR only operates at small throttle openings and it seems to me that disabling it along with cleaning and ensuring the valve itself was sealing gave me the most benefit.


10 bhp! Not in my case.

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Hehehe, 10BHP?? So how much will I got with mine Synergy 2 @ option 10 + K&N Sport Filter + EGR Blank mod + cleaned Inlet manifold + X-tra Diesel additive??

Dead fuel filter and fuel pump... I think.. Still have to primed "self-primed" TD4... Life is brutal sometimes...:doh:

Chaser said:

There is a seller on eBay claiming a bypass gives up to 10bhp. Compared to what??

Later when doing some other maintenance I removed the inlet manifold and cleaned the inside as Ming had done because having seen inside when cleaning the EGR valve It just didn’t seem right to leave it like that. Satisfying as it was to know it’s all clean there was no ‘noticeable’ change to the way the car performed.

10 bhp! Not in my case.

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It may not make any noticeable difference to the performance, but it's worth cleaning as it can bugger up the inlet manifold pressure sensor which gets caked in goo over the years and can leed to all sorts of problems as described in the thread TD4 lack of power, which can run out expensive trying to track the problem down. Glad it was'nt me who had that trouble. being pre warned of these problems makes this site worth it's wieght in gold to amateurs like me

Chaser said:

There is a seller on eBay claiming a bypass gives up to 10bhp. Compared to what??




10 bhp! Not in my case.

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I know Roverron worked closely with the guy who developed one of the first bypasses & they quoted 8-10bhp gain. I believe they dyno tested a car before & after the bypass mod, same as they did with their synergy tuning modules. It was one of these units that I bought, which might account for varying results people are achieving, as when I recently looked on ebay the bypasses looked a little different to the one I bought & fitted.

I think the reason we are 'feeling' varying results is likely to be because of the varying condition of the particular EGR systems being replaced. We all agree it's a crap system that malfunctions even on relatively low mileage vehicles. It could be that those that notice the most improvement have without realising, bypassed more faulty systems.