name that part

woodae · Post by **woodae** » Thu Mar 16, 2006 12:30 am

i was cl;eaning the intake because it is gummed up because i was running my car without an oxygen sensor working right for almost a year. Lots of gas getting burned and not burned = a big mess what is the thing on top of the intake manifold next to the valve cover. I have a 1.5l SOHC help can i take it apart? to clean

Brian5475E · Post by **Brian5475E** » Thu Mar 16, 2006 12:59 am

EGR Valve

woodae · Post by **woodae** » Thu Mar 16, 2006 1:40 am

what does it do?

PoTsUrFrIeNd · Post by **PoTsUrFrIeNd** » Thu Mar 16, 2006 9:10 am

E.G.R. stands for Exhaust Gas Recirculation...It recirculates the unburnt gases in the exhaust system that might try to get through...my guess is that it is gummed up because you had the o2 sensor unhooked and the car was sending all kinds of funky mixtures in the engine....you were probably getting bad gas mileage! If you replace it you will probably notice an improvement in your engines running status!

panther · Post by **panther** » Thu Mar 16, 2006 1:05 pm

Its function is to allow hot exhaust gases to enter the inlet which helps the environment by lowering Nitrogen Oxides. The EGR valve does nothing to help the engine's performance but in fact hurts performance (especially if it sticks open). It's like the Cat, it's function is to help the environment at the cost of performance. If you want better mileage, a smoother idle and better performance, make a tin gasket and block off the EGR valve. But only advisable in countries who don't check the NOx emissions.

woodae · Post by **woodae** » Thu Mar 16, 2006 5:20 pm

so could i use a pop can for the tin peice,
i know for sure they don't check emission stuff in nova scotia

panther · Post by **panther** » Thu Mar 16, 2006 5:53 pm

I used a flattened coke tin which I put in a vice or you may be able to get a nice flat piece from a metal shop. Apart from making 2 holes for the securing bolts, you will also need to drill a hole in the tin gasket to allow the tip of the EGR valve to fit in the exhaust manifold chamber. You will see what I mean when you remove the EGR. The hole leading to the inlet chamber will be blocked off.

woodae · Post by **woodae** » Thu Mar 16, 2006 6:20 pm

if i block off everything but the 2 bolt holes will it be ok? or what else do i have to make holes for?

panther · Post by **panther** » Thu Mar 16, 2006 6:49 pm

You can do it that way but you will need to find a custom made EGR blanking plate cover. I have seen these available for other makes of car but not the Daewoo. You can use the existing EGR as the cover but the end of the EGR valve protrudes into the exhaust chamber of the manifold so you will need to drill a hole in the tin gasket to allow it to fit. I will see if I can find a pic.

panther · Post by **panther** » Thu Mar 16, 2006 7:14 pm

This is not a Daewoo EGR but is similar to the one fitted to the sohc. Look at the gasket and you will see the round hole which fits over the tip of the EGR and the square hole which allows exhaust gasses to enter the Inlet manifold.

You need to make a gasket with the round hole to fit over the EGR but leaving the square hole intact to blank off the inlet chamber. Hope this makes more sense now.

woodae · Post by **woodae** » Thu Mar 16, 2006 10:01 pm

mine didn't have a peice that sticks out. it was just a hole connected to a hole and there was a torx bolt that moves up and down. i plugged the hole with the torx bit in it
Thanks

MMamdouh · Post by **MMamdouh** » Fri Mar 17, 2006 9:01 am

why the hussle trying to do blocks and stuff?? if the EGR is penumatic then remove the socket of the solinoid that operates it, if it is electrical then remove the EGR's socket itself and call it a day.

MMamdouh

panther · Post by **panther** » Fri Mar 17, 2006 10:24 am

Because simply disconnecting & blocking the vacuum pipe or removing the electric plug wont work. That's why.

Woodae,
you may have a different design of EGR than is fitted to the 1.4 so your method will work just as well without having to cut a hole to fit the end of the EGR.

MMamdouh · Post by **MMamdouh** » Fri Mar 17, 2006 1:46 pm

panther wrote:Because simply disconnecting & blocking the vacuum pipe or removing the electric plug wont work. That's why.

OH really??! would you explain to me how would the EGR valve work with no vacuum to actuate it?

MMamdouh

panther · Post by **panther** » Fri Mar 17, 2006 2:50 pm

Disconnecting vacuum or electric plug will throw a CEL and put the ecu into "get you home mode". Anyway, over time (especially with a high mileage car) the EGR valve accumulates more carbon deposits (clinker) which eventually prevents the EGR from fully closing. This gives similar symptoms as if you had an air leak in your intake system. The unwanted air will weaken the fuel mixture and you start to experience hesitation problems especially when starting off and/or irratic idling problems and generally lack of power at the lower end RPM. The ecu and ISCV will be working hard to try and correct this unwanted air leak so you may not notice it as much in the beginning. But if the air leak in the EGR gets bigger the problems will be more noticeable.

If you search Google (or your preferred method of search engine) you will get a better understanding of the function of the EGR and why so many people block it off.

Hope that helps you??!

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