Egr delete/block off plate

[zman6127]

What is the procedure to eliminating the egr valve and installing block off plate? I just did my head gasket and was wondering if anything had to be done with the egr cooler on the back of the head that you can't access unless the head it off.


Zach "zman6127" Prindle

 

[hvyman]

If you really want to know you get block off plates and block off the head either at the back or on the side and the manifold.

 

[zman6127]

Well my head is already on so I'd block where the egr lave bolts to the side of the head and at the manifold?


Zach "zman6127" Prindle

 

[Poodles]

You block at the back, and you can get the EGR cooler off with the motor in the car.

Not that removing EGR is smart...

 

[zman6127]

Yeah I just read only to doing you
Have a jdm ecu. Ill leave it alone. People keep asking if I did it to prevent cyl 6 gasket failure


Zach "zman6127" Prindle

 

[hvyman]

Removing it makes the back of the head hotter.

 

[zman6127]

Then wth are they talking about


Zach "zman6127" Prindle

 

[Nick M]

Then wth are they talking about

Things that they know not about.

 

[Dan_Gyoba]

It's the "Common sense that everyone knows" that putting hot exhaust gasses in contact with the head must make the head hotter, therefore blocking off the EGR must make the head cooler. Forget about the fact that what makes heat is burning fuel, and the EGR system puts inert gas into the intake, which doesn't have any oxygen, therefore doesn't burn any fuel, therefore produces less heat.

The JDM ECU doesn't expect to have it, but will run with a higher EGT.

 

[92jza70]

On my last 7mgte i blocked it off where the egr bolts to the side due to the fact that i was missing some parts for the egr system that i could not find locally and was sick of waiting for parts to come in, i left the plate on the back just cause i was lazy. never had a problem. yes the egt was higher and the ect was a little higher but never once had an issue till i started boosting the stock ct26 over 13psi

 

[EHumble]

I actually just bought the EGR block off kit from Driftmotion. you have to remove the EGR cooler on the back of the head and bolt one of the plates on the two farthest holes to the right, which covers the small hole where the exhaust gasses come out. The hole on the left doesnt matter because it just goes to the EGR valve. the EGR cooler plate stays off after this mod. I sealed it up with some Honda-Bond High Temp silicone. The other plate bolts onto the intake where the EGR valve would bolt up. I cant comment on how it performs becaus my motor is in pieces right now and I realized that the stock pistons are shot. But it shouldnt make any difference. The problem people run into with higher EGT's is when they just remove the EGR valve and bolt a plate onto the head, not behind the cooler. this allows the exhaust gases to circulate in the enclosed space on the cooler, causing heat to build up on the back of the head, which could eventually cause premature HG failure. Which as we all know, is no fun. I'll try to get a pic of it on the head when i got into work monday.

 

[Nick M]

The problem people run into with higher EGT's is when they just remove the EGR valve and bolt a plate onto the head, not behind the cooler. this allows the exhaust gases to circulate in the enclosed space on the cooler, causing heat to build up on the back of the head, which could eventually cause premature HG failure. Which as we all know, is no fun. I'll try to get a pic of it on the head when i got into work monday.

Well, no. What would exhaust do that can not get into the combustion chamber because it is circulating in an enclosed space? Toyota, as do all manufacturers, run a different tune when when EGR flow is commanded. Whether you realize it or not, tune effects EGT. Especially adding timing.

You can read about it here. It is at the end with other corrections.

http://www.autoshop101.com/forms/h25.pdf

 

[Supraguy7M]

I've deleted the egr on everything ive ever owned and never had any issues.. is the 7m more tempermental without it cuz its turboed? Just wondering

 

[jetjock]

Crack me up...

 

[Nick M]

I've deleted the egr on everything ive ever owned and never had any issues..

Did you not read the post above yours with the link to EGR operation? I have seen wires twisted together and wrapped in electrical tape too. That doesn't make it right.

 

[jetjock]

I'll never understand why Toyota's technical info on that site isn't clear to some people:

"The ECM considers the EGR system an integral part of the entire Engine Control System (ECS).
Therefore, the ECM is capable of neutralizing the negative performance aspects of EGR by
programming additional spark advance and decreased fuel injection duration during periods of
high EGR flow."

"Too little EGR flow may cause detonation and IM240 emissions failure for excessive NOx.
Because EGR tends to reduce the volatility of the air/fuel charge, loss of EGR typically
causes detonation to occur. If EGR is commanded but doesn't flow (restricted passage in
manifold, nonfunctional valve, etc.) severe detonation will occur."

 

[Supraguy7M]

Well then.. I got rid of my whole egr system.. if I still had it, knowing that now, I would put it back in.. guess I should have looked more into it.

 

[jetjock]

The early history of EGR in fact revolved around detonation suppression. The discovery of its effect on NOx reduction was serendipitous. By running higher octane than usual your engine should be fine. Course, you'll still be crapping up the air but I guess that was never an issue in the first place.

 

[Grandavi]

CAVEAT >>> This is regarding my car and I am not a mechanic... the following statements are argumentative... research and decide...

I got rid of the EGR... no issues. The exhaust temp will likely be higher (probably about 100 degrees according to tests done).

Did I do it because I thought it improved the engine? Nope. Did it because its unmonitored on a MK3 (North American) except in California. Mine was leaking for a few years and I had no idea it was doing so. Also, the parts that I wanted to replace were no longer available OEM. So... it is gone.

Am I going to have issues? nope. Is it going to hurt the environment? nope. Neither is removing my cats.. although it smells funny.. lol.

Its all in keeping things in perspective. A proper block-off will work just fine. If it was a critical part of the engine it would/should be monitored.

As for no cats & no EGR, I personally only drive about 3000-5000 km per year (that's ALL vehicles) so.. why would I worry? Other things to think about.



Bottom line.. you can delete the EGR and your engine will be fine (just do it properly). Just be aware your EGT's will be slightly higher.

 

[Supraguy7M]

By running higher octane than usual your engine should be fine.

I run 93 octane pump gas, and the occasional 109 Lucas octane booster.