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)

[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.