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Old 03-13-2003, 01:47 PM   #1
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Default EGR block (disable system how to)

Well after 75 miles on the new engine (with stock ECU), I've had no check engine light from the EGR block I did before I installed the engine.

Heres how I did it.

1st the EGR system is all supplied by cyl #4

Click the image to open in full size.

You can see in this pic how it the gases get to the EGR valve.

Click the image to open in full size.

The valve itself (you'll need a new gasket after pulling this off).

Click the image to open in full size.

Once open the valve feeds all cyl with exhaust gas.

Click the image to open in full size.

To block the system I used a piece of old head gasket but anything thin and metal will work (aluminum can cut up would also work). You can see the gasket plate is a two piece metal gasket.

Click the image to open in full size.

To seal everything up, I put Permatex Copper Seal.

Click the image to open in full size.

You can see it here on the opening that seals the blocking plate to the upper portion of the EGR dist system.

Click the image to open in full size.

Here it is installed.

Click the image to open in full size.

You can see since this is downstream from all the EGR valves and solenoids, the system has no way of knowing the exhaust gases arent making it into the engine.

Enjoy.
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Old 03-13-2003, 01:56 PM   #2
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Default Re: EGR block (niedejb)

Really Good Post Click the image to open in full size. Click the image to open in full size.

I have a question, does the EGR gases still get to flow on the intake on the left part? meaning, does it still heats the IM? or did you block that on the head?
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Old 03-13-2003, 02:05 PM   #3
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Default Re: EGR block (GZERO)

It still gets to the valve.

I'm more worried about crap getting into my brand new engine than the manifold heat.

If you block it at the head the gases wont lift the valve (I think) and youll get a CEL. I havnt tried that, but my feeling is it wont work.

The ECU can detect the solenoid not working and the actual lift on the EGR valve.

Vac ought to raise the valve, but all these EGR CEL posts say that cleaning these ports solved the problems. If thats the case, the vacuum alone couldnt pic up the valve all the way. Either that or the build up inside the valve kept it from raising all the way.

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Old 03-13-2003, 02:06 PM   #4
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Default Re: EGR block (GZERO)

why would one do this? disabling egr what are the advantage of doing so ?
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Old 03-13-2003, 02:10 PM   #5
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Default Re: EGR block (GZERO)

Quote:
Really Good Post Click the image to open in full size. Click the image to open in full size.

I have a question, does the EGR gases still get to flow on the intake on the left part? meaning, does it still heats the IM? or did you block that on the head?
Edit:

BTW, removing the entire manifold would be required for blocking where you are describing (pain in the ***).

The way I posted can all be done with the intake manifold in place. Click the image to open in full size.
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Old 03-13-2003, 02:15 PM   #6
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Default Re: EGR block (patastinky)

Quote:
why would one do this? disabling egr what are the advantage of doing so ?
Three reasons.

1) These passages clog over time and could cause a CEL.

2) These gases dilute your intake charge and rob you of power (minimal but still a loss)

3) Tuning air to fuel ratios would be a pain in the *** if this valve is diluting some of the time and not the others. The exaust gasses can increase/decrease the likelyhood of detonation when boosting.
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Old 03-13-2003, 02:43 PM   #7
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Default Re: EGR block (niedejb)

Can't you block off all the holes and not throw a cell since you're going to be using the AEM system?

i need to block off everything and take out that ugly egr valve to use my fuel setup.... i've unplugged the whole EGR system... so far no cell with the OBD I
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Old 03-13-2003, 02:45 PM   #8
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Default Re: EGR block (accordfreak)

Quote:
Can't you block off all the holes and not throw a cell since you're going to be using the AEM system?
Yes.

I'm running the stock ECU for the break in and didnt want the contamination until I get the EMS in and tuned.
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Old 03-13-2003, 02:52 PM   #9
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Default Re: EGR block (niedejb)

Excellent post!

i wonder how hard it would be to make a heat sink type setup to bracket on to the
egr valve to dissipate the heat?
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Old 03-14-2003, 03:46 AM   #10
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Default Re: EGR block (carolinaACCORD)

Quote:
... i wonder how hard it would be to make a heat sink type setup to bracket on to the egr valve to dissipate the heat?
I don't think it would be necessary. Exhaust has to keep flowing to supply heat to the manilold. Since the exhaust is blocked, it cools down to match the manifold temperature anyway.

You'd be better off spending time & effort on something that looks more like a charge cooler. Or Click the image to open in full size. a CAI.
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Old 03-14-2003, 05:06 AM   #11
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Default Re: EGR block (JimBlake)

Quote:
I don't think it would be necessary. Exhaust has to keep flowing to supply heat to the manilold. Since the exhaust is blocked, it cools down to match the manifold temperature anyway.

You'd be better off spending time & effort on something that looks more like a charge cooler. Or Click the image to open in full size. a CAI.
good point, i guess there would be a compromise between the temperatures.
so it wouldnt be that big of a factor. Click the image to open in full size.
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Old 03-16-2003, 12:05 AM   #12
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Default Re: EGR block (carolinaACCORD)

Good Post..... may have to check that with my engine before i do the smog Click the image to open in full size.
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Old 03-16-2003, 02:37 AM   #13
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Default Re: EGR block (niedejb)

neidejb, what happen to your old motor? still gonna boost it? Click the image to open in full size.
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Old 03-16-2003, 03:48 AM   #14
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Default Re: EGR block (iam7head)

Quote:
neidejb, what happen to your old motor? still gonna boost it? Click the image to open in full size.
Dont understand the question....the built engine is in a undergoing the 500 mile break in before boosting. The old engine is sitting on my work bench in the garage. Thinking about building it for my hatchback.
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Old 12-12-2007, 01:08 PM   #15
 
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Default Re: EGR block (niedejb)

Hey I bought a 91 Accord SE with a blown engine. I dropped a 94 F22B2 in it with the head from the 91. Here are some of the problems I'm having. Engine light is on, S light flashes, wont shift into overdrive, engine revs up & down. Codes 12 & 17 flash meaning EGR & speed sensor problems. I've changed the Speed sensor, still same problem. I believe my problems are electrical but I'm not sure.

Question is where do I start? Do I change the ECU to a 94? Could it be the TCU? I've put way more money into this than I wanted already, when should I stop?
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Old 12-13-2007, 04:18 AM   #16
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Default Re: EGR block (melissah)

that is a question that is completely unrelated to this thread.

Please create a new thread to discuss your problem(s). Thanks
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Old 12-13-2007, 08:51 AM   #17
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Default Re: EGR block (TouringAccord)

Beautiful write up Click the image to open in full size. Click the image to open in full size.
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Old 12-13-2007, 06:56 PM   #18
 
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Default Re: EGR block (JDM_CD7)

Nice write up !!!
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Old 02-14-2009, 04:58 PM   #19
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Default Re: EGR block (disable system how to)

Can you rehost the pictures? I only see red x's
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Old 04-28-2009, 06:19 AM   #20
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Default Re: EGR block (disable system how to)

can i block of the egr on my 96 accord ex f22b1?

obdll and i will need to get emissions this summer. i can always unclog it for emissions

the pics are broken links but im guessing all you gotta do a fab a block off plate and use some sealer to seal it down over where the egr valve would be. would it be best to just make a block off plate and put the egr vavle back on with the plate underneath it?

after doing this what do you do with the vacuum hoses going to the egr valve?
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Old 05-21-2009, 08:46 AM   #21
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Default Re: EGR block (disable system how to)

help, why is it i cant see the pictures?
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Old 05-29-2009, 05:16 AM   #22
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Default Re: EGR block (disable system how to)

great post, thanks
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Old 06-22-2009, 04:45 PM   #23
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Default Re: EGR block (disable system how to)

This would create a mean pressure I would think in the head. And also make your engine so dirty and contaminated inside. This is cheap. What you should really be doing is installing an oil catch can to catch the contaminants instead of blocking them and forcing it to stay in the head. Dumb IMO
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Old 06-22-2009, 05:27 PM   #24
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Default Re: EGR block (disable system how to)

This wouldn't cause any pressure difference in the head. The exhaust gas recirculation system works off vacuum from the intake. As the EGR valve opens, the vacuum created by the intake manifold pulls exhaust gases into the intake system. Through a small opening in the left exhaust port on the #4 cylinder.

An oil catch can is used in line with the PCV system to catch any oil and carbon from getting into the intake manifold not exhaust gases.


However I still think that this mod will throw an insufficient exhaust gas flow CEL after a while. You may not get the EGR lift CEL but insufficient flow should still be detected.

Last edited by GhostAccord; 06-22-2009 at 05:37 PM.
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Old 03-22-2011, 05:19 PM   #25
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Default Re: EGR block (disable system how to)

thanks for the info, although im still confused on whether this is a safe mod or not... Im sick of the problems created by this system and wanted to just do a full delete however lack of funds are preventing this. If i could just do a basic block off plate with no serious adverse effects i would be happy. Sorry for digging up a dinosaur of a thread but it intrested me.
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