EGR Valve Cleaning Question

[MyCord]

Okay so I've read all the info on the EGR Valvle diy here:

http://home.comcast.net/~em-engineering/T2T013.pdf

I totaly understand it and know what to do but I'm confused on one part. It says "After using a pick or a drill bit to break the carbon loose, use compressed air and carb cleaner to make sure the port is clear." and it says "Use a pick or drill bit to clean out the passageway. Go straight down and be sure and clear the hole at the bottome of the runner."

Now there is no way they picked all of the carbon crap out of the whole, reading it I assume they want me to knock all the carbon into the whole and clear the bottom of them, then re apply the valves. This confuses me because I would think knocking all the carbon crap into the pipe area of the intake manifold which I'm assuming enters the engine would be horrible for the engine. The only thing that caught my atention was when they said this is where the exhaust gasses enter, so I guess the exhaust goes into the intake manifold which would mean the carbon would go out the exhaust wich is fine but I find it hard to beleive that exhaust goes back into the intake manifold, I thought it just sucked air into the engine and then out the headers, which would mean the carb crap going into the engine and most likely staying there. I could be wrong but if that is what happenes then wouldn't that do damage? or maybe it is exhaust and it's fine..

Can someone clarify for me please and explain how it works? Thanks guys

I posted this in the technical forum and only got one response which was suggesting to take the entire intake manifold off.. what do you guys think.

[MyCord]

???? I can't beleive noones knows!

[r3vmixman]

You have to

[r3vmixman]

also make sure you buy a new Intake M gasket

[MyCord]

Okay, I will. I was just wondering since it never said to remove it during the whole diy.

[blazen_accord]

you don't have to remove the manifold to do this, it a luxury but most don't have the time to removed it. The carbon buildup will fall into the manifold and get suck into the engine and get burn up. That mean after you unclog the port you will have to run hard and rev high to help the engine burn the extra carbon, don't worry it should not harm your engine unless you have to drill the EGR service port(for some model) and metal shaving fall in the manifold. People also clean their throttle body at the same time since after dumping lot of cleaning agent(seafroam or what ever) you have to run hard and rev your engine so it will burn all the extra cleaning cleaning agent. you will see and hear some noises from the engine, but after a few minute all the extra carbon and junk are burn up and go out the exhaust.

[cp[mike]]

use a shopvac and put the nozzle onto each opening and suck it clear...