Easy EGR removal

[Doubt_Incarnate]

i was shopping through ACE today for stuff to work with and found that you can use a 1/2" cap for a flare fitting (plumbing, about $2.50) on the egr adapter coming from the rear exhaust manifold. at the manifold, you want to take the big hex off the small one and pull the egr tube, and put this on the adapter where the tube was. if you just want to stick a bolt in it, you need like a M16x1.50. or for the home skill-et you can just cut it off and bend the tube over and crush it, hope it doesnt leak. any way, all you have to do is put a filter on the end of you're egr valve where the exhaust used to come in, or routue it to a filtered air source, like your intake tube, and you shouldnt get the ses light. i dunno how many want to get rid of egr, but i dont like the black carbon crap all over my valves and intake. now i just need to filter or run the PCV through a catch can to keep it from crapping the intake up. any ideas there?

[bszopi]

RE: Easy EGR removal

You mean, like this one?



Yeah, mine's been that way for... going on 2 years almost. It fell out once, so that kind of sucked.

[Doubt_Incarnate]

fell out? id imagine that sucked. whered you get the big bolt? i was going to do that except i had to buy one about 20mm to long and cut it down, combined with a nut to take the burs off after the cut it was like $4.50. i dont think im going to worry about the egr valve itself tho, my wiring harnes is for vacuum egr, and i dont feel like adding usless wires. now i just need to block the plenum end. i know i need to come up with a IAT sensor, think i'll have any problems mounting it in that hole?

[bszopi]

Its not a big bolt. Its a plumbing fitting from Ace Hardware.

[Doubt_Incarnate]

oh, thats wierd i couldnt get anything to fit, thats why i bought the flare cap. i had a plug from one of those "help!" isles, but it wouldnt fit. just sort of threaded in 1/2 turn and stuck. oh well, the whole purpose of this post is to make it easier for someone to find a easy answer any way they do it. i searched a little but i must have ADD or my eyes really are that bad that i didn't see it.

[Cliff8928]

Just curious what size that fitting is, I'd like to re-tap mine to fit M18-1.50 so i could put the oxygen sensor in there, mine's a little too close to the steering rack for my taste right now.

[Doubt_Incarnate]

this is a pic of mine (3.1l), that adapter on the manifold was part of the EGR pickup and i just put it back in place, then just put that 1/2" flare cap on it (kinda odd going from metric to standard like that) it fit perfectly. the threads in the manifold are for M16x1.5, so there is probably room for an M18.

[scootrs88]

i was having trouble with my egr and all i did was disconnect the vac source and plugged it off now i have an inoperative egr and no ses light just incase that helps some one :P

[Doubt_Incarnate]

yeah i should of just put it on as it was since my car isnt wired for the digital egr valve, it would have never worked, i dont know if i would have got a light tho. i figured just leave it off, thats one less 1/4lbs, and minus an ugly coroded cast iron chunk spreading cancer. its wierd, everytimr i mentioned this before all i got was arguments to keep it ( emissions, cooler running, economy...) and never really any help on how to just get rid of it. i'm just pretty sure not having all that black crap build up on valves and in the runners and ports is a good thing. now how do we go about cleaning up the PCV? could we just filter it, or would a baffle/catch can/seperator be better?

[Juglenaut]

When gas hits 4 dollars a gallon we will talk.

[Synestral]

I wouldn't mind keeping the EGR for the economy, but if there were a way to filter all the carbon out and still let the unburnt fuel go through that would be awesome. Of course, I never thought about how EGR would react to boost...

I know it's a different engine I'm working with, but all that carbon crap pisses me off when I need to do intake or injector work.

[eliteweapons]

Hey a company called tomco inc has some egr screen kits in the gasket. thought you might wanna have a look. www.tomco-inc.com What kind of problems do you have with the egr under boost?

[Doubt_Incarnate]

gas hits $4 and im riding a bicycle...

egr under boost shouldn't actually be a problem. if you read maximun boost they say the pressure in the manifolds is something like 2X what your boost pressure is, so its gonna force its own way in.

thats my biggest problem, the carbon crap. what a brilliant idea, lets vent some exhaust into the plenum right behind the TB, so it efects as much of the intake as possible. even the TB is black an the plenum side, so the plenum, runners, any sensors in the plenum, the injectors (though the gas itself helps these guys), valves, and even the pistons get that crap all over. it cant be good to have carbon built on the pistons, that would create a hot spot and incite pre-ignition, really bad for high CR's or boost. i'm still at a loss to understand how putting hot gasses into the combustion chamber help to cool it, 80* ambient air can't be hotter than exhaust.

[oleman]

The EGR does not cool the combustion gases by adding a cool gas to the mixture.
The EGR adds non combustable exhaust gas to the mixture, essentially reducing the oxygen available to support combustion. With less available oxygen you get less heat and less power. With less O2 less fuel is required for the same mixture %.
With less oxygen and less heat produced poorer quality fuel can be used!
The bottom line is that with lower combustion temp lower emissions are produced allowing a cleaner burning engine, BUT at reduced HP.

[Doubt_Incarnate]

that makes sence. to bad its using the crappy exhaust gasses with all the black in it. i think anothe cause of the buildup in the intakes is the pcv system, it isnt supposed to suck up oil, but then, nothings perfect. so that little bit of oil vapor burns to or sticks to things and collects whatever passes by.