Blocking of egr

[KCboy]

Can anyone explain what egr does and what good it will do by blocking it? Read in sone of the threds in the forum that it will do more good than harm to your engine when you block it.....

[Ry_Tower]

http://tsikot.com/forums/engine-fuel...locking-55523/

sir KC yung sa akin na strada at paj parehong blocked egr na. Old school kasi kaya walang problem. Sa mga CRDi unit ibang usapan na at sure na may engine warning yan since kasama yan sa monitoring ng ECU.

Sa old school kasi, dpat sa idle lang yan magwork pero kapag matagal na, stuck-up na. Puwede linisan if ok pa or alitan ng bago if sira na talaga. Sa akin, condemned na lang. No problem, bawas pa smoke at bawas contaminants going into the engine.

[t2erns]

blocking off the egr will do more harm than good sa ating environment. the egr helps in cooling down the exhaust ng sasakyan to reduce NOx emission (very harmful). kaya yan nandyan ay para pangalagaan ang ating environment.BTW it should not work at idle otherwise magiging erratic ang idling ng sasakyan.

[Ry_Tower]

blocking off the egr will do more harm than good sa ating environment. the egr helps in cooling down the exhaust ng sasakyan to reduce NOx emission (very harmful). kaya yan nandyan ay para pangalagaan ang ating environment.BTW it should not work at idle otherwise magiging erratic ang idling ng sasakyan.

Yan nakalagay sa manual at sa mga forums. EGR is designed for idling to reduce NOX nga. Kung minimal idling lang naman, it's worth it IMO. Mas ok pa rin nga kung palitan na lang.

[miko101130]

lets clarify somethings first

EGR- exhaust gas recirculation

Because NOx forms primarily when a mixture of nitrogen and oxygen is subjected to high temperature, the lower combustion chamber temperatures caused by EGR reduces the amount of NOx the combustion generates(from wikipedia)

sa loob ng combustion chamber mainit at mataas ang pressure... pag pasok ng hangin(air with oxygen and nitrogen components) together with fuel(either petrol or diesel) plus spark, magkakaroon ng combustion(pagsabog sa loob ng cylinder) one by product is NOx(nitrous oxide) which is harmful to most life forms(kasama mga tao), the greater the temperature(inside the cylinder) the higher the NOx that will be produce. unfortunately dahil modern times tau, we are using electronic controlled fuel and air delivery system( varied and air and fuel ratio according sa need ng vehicle) it will result again into higher NOx..

kaya naimbenta ang EGR, yung exhaust gases coming from the combustion process na papunta na sana sa labas ng tambutso gets recycled( a portion of the gases). it will be sucked and brought to the combustion chamber again to reduce the temperature. pag stable and temperature, ang NOx emission is reduced.

nitrogen +oxygen+high temp combustion=high NOx
nitrogen +oxygen+high temp combustion+ EGR= tolerable NOx

sa mga bagong vehicles, the valve that controls the amount of gases recirculated back is controlled and monitored by the ECU according to the demands of the vehicle.. in short mahirap paki-alamanan!

kapag CRUISING KA (around 60-80kph) the EGR is working at its best... why? because constant ang engine load so predictable ang amount of exhaust gas to be recirculated(LEAN BURN).. so the vehicle does not need so much oxygen or air that is.. therefore pag idle ka the EGR valve is fully closed.

kapag umaarankada ka o paahon o humahataw ka ng takbo the ECU will close the EGR valve to allow more oxygen to be burned.. when the engine needs more power , it needs more volume of air containing oxygen so the EGR will be closed off to provide a rich oxygen environment.. kaya pag mabilis takbo you are polluting the environment more..

IDLE= EGR closed.
CRUISING SPEEDS= EGR open
ACCELERATION/LOAD= EGR closed

in other countries it is illegeal to close EGR. kung luma sasakyan mo its forgivable, kase it will benefit the vehicle..

in the long run, EGR is a primary cause of Gunk and dirt inside the engine.

[t2erns]

nice post.

a link about egr and some diagnostics procedures:
Exhaust Gas Recirculation (EGR)

[miko101130]

Pics of EGR gunk
"check your EGR regularly"

http://i1107.photobucket.com/albums/...0/sm0000g2.jpg
http://i1107.photobucket.com/albums/...lugged-egr.jpg
http://i1107.photobucket.com/albums/...takesludge.jpg
http://i1107.photobucket.com/albums/...130/images.jpg
http://i1107.photobucket.com/albums/...01130/gunk.jpg

[yebo]

NOx = smog. if you like a smoggy metro then go ahead block your egr. if you want cleaner air then please do what is needed, and that is to keep your car properly maintained.

[dvldoc]

Here is the real deal with EGR valve, they only work like they are supposed to when they are new, once they gunk up your engine it completely negates any gains it would have made by being in place.

Why you ask because of the carbon and soot build up increases the exhaust gas temps inside the engine increasing the NOX.

Any that can look at you with a strait face and say this is helping reduce emissions is only going by the theory of how the system works and not what it actually does to the inside of the engine. Unless you do a full intake manifold and intake tract cleaning including the EGR valve. The only thing that can help you is adding a oil catch can. With low quality fuel and low quality fuel and oil filters it makes the clogging and reduced function of these happen.
[SIZE=5]
Does anyone actually think this is reducing emissions?????[/SIZE]. If you never cleaned your intake on a diesel or turbo diesel yours loos like this.


So if your not going to pony up the money for the full intake tracked cleaning your better off deleting the EGR because it is actually making the engine run dirtier making pollution worse. So either maintain it or loose it is how I see the EGR. Most of these will be blocked already via the build up of harden soot and carbon and oil so they are not working to begin with. They really need to be cleaned completely yearly. If you have a 10 year old diesel engine and you have never had it cleaned, you can bet it's not even opening or is completely blocked off already.

To many base stuff on theory vs real world facts. And what I stated is the facts.

[KCboy]

I did add an oil catcg can to minimizee the dirt stuff that goes back to the engineg, wiill regular cleaning of the egr lead to permanent damage to the egr components...( Disassemble, cleaning, diassemble).......with regards to blocking it, will i get any improvement on my engine or am i just polluting the environment more?

[KCboy]

Sir dvldoc,

Maybe you can teach us how o properly clean the egr? I am sure my pick up truck has accumulated already atleast half of the dirt that is in the picture you posted since i da a lot of idling stop and go driving thru traffic here in downtown manila.....

[Ry_Tower]

Sir dvldoc,

Maybe you can teach us how o properly clean the egr? I am sure my pick up truck has accumulated already atleast half of the dirt that is in the picture you posted since i da a lot of idling stop and go driving thru traffic here in downtown manila.....

Madali lang sir linisin EGR ng 4d56.

Somewhere here posted the procedure I just can't remember eh. Yung metal tube lang naman and 2 bolts are what is holding the egr to the intake manifold. Easy to DIY. Use gasoline for cleaning since mas madali matuyo.

[dvldoc]

Regular cleaning of the EGR will not harm it. You need a good degreasing solvent and some elbow grease to clean it out. Boiling water really breaks it up quickly as well. Just let it dry out before re-installing.

I recommend everyone inspect it at least once a year, every 6 months would be much better because they get nasty very quickly especially if you don't have a oil catch can.

[miko101130]

i have a gen 3 pajero from japan, jdm unit... i completely cleaned the intake manifold and all intake tract including the egr throttle body etc... it was indeed dirty..

1. adding catch can can only reduce the dirt soo much... the catch can is not the major source of engine dirt but the EGR...

2. the Egr is a Necessary evil... if you maintain your EGr regularly there is no reason why you should close/remove it..

3. diesel engines produces more soot than petrol therefore cleaning must be more frequent... i think once a year would suffice..

the auto industry always aspire to lower emission and improve efficiency, the EGR was designed to lower emissions and improve efficiency, there are no immortal car parts! therefore all contraptions on our vehicles needs cleaning and replacing... if your EGR is dirty CLEAN IT.. if your EGR is faulty REPLACE IT,, but don't remove it. there is no guilt-free car.

On newer cars the EGR has a start up sensor, it will do a self test diagnosis by cycling the valve of the EGR to prevent it from stucking up, if its stucking up the EGR will send a fault code and engine light will illuminate..

on older cars there maybe no sensors in the EGR valve, therefore the owner must periodically listen to the thack-thack sound it produces during start up to know if its functioning... you can also manually use a multimeter to know if the circuitry is ok..

the owner is responsible for maintaining the vehicle in tip-top condition so that its emission and performance is good. Failure of a part is not a reason to completely removed it,, everything in your car has a valid function..

[dvldoc]

Unfortunately most people have no clue this is a issue. They only work if they are maintained.

[jick.cejoco]

as for my former shop foreman in the medium and heavy equipment shop if he can't figure it out:
alisin mo yan, pampagulo lang yan once he gets stuck on something. he refuses to learn just like many of our own people. stuck in the '70's car mentality. read, get educated and get training on things you feel is important or leave the vehicle maintenance to the professionals

[crazy_boy]

i have a gen 3 pajero from japan, jdm unit... i completely cleaned the intake manifold and all intake tract including the egr throttle body etc... it was indeed dirty..

1. adding catch can can only reduce the dirt soo much... the catch can is not the major source of engine dirt but the EGR...

2. the Egr is a Necessary evil... if you maintain your EGr regularly there is no reason why you should close/remove it..

3. diesel engines produces more soot than petrol therefore cleaning must be more frequent... i think once a year would suffice..

the auto industry always aspire to lower emission and improve efficiency, the EGR was designed to lower emissions and improve efficiency, there are no immortal car parts! therefore all contraptions on our vehicles needs cleaning and replacing... if your EGR is dirty CLEAN IT.. if your EGR is faulty REPLACE IT,, but don't remove it. there is no guilt-free car.

On newer cars the EGR has a start up sensor, it will do a self test diagnosis by cycling the valve of the EGR to prevent it from stucking up, if its stucking up the EGR will send a fault code and engine light will illuminate..

on older cars there maybe no sensors in the EGR valve, therefore the owner must periodically listen to the thack-thack sound it produces during start up to know if its functioning... you can also manually use a multimeter to know if the circuitry is ok..

the owner is responsible for maintaining the vehicle in tip-top condition so that its emission and performance is good. Failure of a part is not a reason to completely removed it,, everything in your car has a valid function..

sir how did you clean your intake manifold, intake tract?

my EGR is blocked right now. but i have been thinking of just cleaning the unit and make it work again. sayang naman yung technology. its there na. might as well make full use of it/

[shelu]

where is the egr in the xuv 05 A/T turbo? i will try to clean it DIY. it would better if somebody can post pics where it is. TIA.

[miko101130]

there are bolts and gaskets to remove... i first remove the engine top cover(plastic at top of engine).. then remove the airfilter box. remove the throttle body assembly. remove the sparkplug covers. remove the electrical sensors at the top of the intake manifold. and then remove the manifold itself... the engine was really dirty lots of gunk... once i was able to clean it,, fuel consumption improved and it feels light to drive (considering na gasoline engine pa yun ha)....

that is true we should remove the lame mechanic mentality... we should read and educate ourselves. in the end tayo din nakikinabang dahil meh alam ka sa car mo and basic engine hindi ka agad maloloko ng mechanic and you'll be more confident dealing with shops.

[doo]

where is the egr in the xuv 05 A/T turbo? i will try to clean it DIY. it would better if somebody can post pics where it is. TIA.

I think wala pa EGR system ang 05 model? The engine with EGR should look like this: