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Discussion Starter · #1 ·
I was swapping my motor this weekend and my friend pointed out an issue with the EGR. Even though people block off the EGR with plates and witout removing the head it still does not fix the real problem. Heating up the back of the head with hot exhaust gas.

What I did since my motors were out of the car was to remove the EGR plate, remove the EGR, use a die grinder to enlarge the EGR exhaust hold on the #6 port on the back of the head so I can use a 3/8 NPT plug to seal it. I then did the same for the intake manifold.

Voila, no more EGR and no more hot exhaust gasses heating up the back of the head by #6. This should reduce the chance of detonation by quite a lot since it will run way cooler.

I feel that this is a much better solution than block off plates since the plates only eliminate the exhaust gasses from being reintroduced into the combustion chamber. Toyota did some pretty good things when

The big downside is you have to pull the head or do it while the motor is out.
 

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Republican
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I HATE CALIFORNIA!
 

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Discussion Starter · #3 ·
Another reason I refuse to live in the peoples comumnist republic of california... Smog Nazi's. That and you can't carry a concealed gun :(

BTW, you could plug the holes and put the EGR back on. It would just be non functional after that and the smog nazi's wouldn't know.
 

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Canada, Eh?
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ZombieSS said:
That and you can't carry a concealed gun :(
ya, becuase everyone needs a concealed weapon to "defend their home" right?

*sigh*
 

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My name's Scruffy.
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this EGR thing has been talked about and has been done alot of times...very old...search next time
 
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viper - (and this isn't a flame) seems that he was offering an alternative method, not asking a question.

And a good alternative, as I have searched and read many egr threads, and have not come across a method for blocking off the port on the back of the head where the cooler normally goes. I am assuming this is what you plugged, Zombie.

And I was about to post a thread asking where I could get a blockoff plate for where the cooler goes, lol. Thanks for the tip Zombie!

-Bill
 

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Discussion Starter · #7 ·
viperlocc said:
this EGR thing has been talked about and has been done alot of times...very old...search next time
I did search and I didn't see this method for blocking off the EGR. Every method i saw was done with plates and still retained the gasses going over the back of the head.
 

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white guy
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yea, he was just tellin how he blocked it off, which seems to be the first to do it this way, calm down...
 

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Discussion Starter · #11 ·
the plug being steel is not an issue. This mod has been on the car i bought for 2 years and there are ZERO problems with it.

Thats like saying you need to use an aluminum helicoil if you have aluminum head. It's splitting hairs and doesn't matter.

I feel much better knowing that my #6 cyl is not super hot anymore due to exhaust heating it.

Ever wonder why the #6 cyl is usually the hottest cyl for EGT on these cars, this is probably the reason.
 

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its probably better if the plug is made of steel anyway. aluminum expands at about double the rate(give or take) as steel..so with an aluminum plug you would risk cracking the port. stick with steel.
 

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The Great Kruso
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Im almost a little confused here....I've ALWAYS taken off the rear head plate and stuck my block off plate there, essentially what you are doing. Now how is THAT any different then what you are doing???

Kruso
 
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Thats the same thing. He was talking about how its useless to leave the cooler on the back of the head, but block off the intake plenum port, which yes, it is. But if you remove the cooler, doesnt really matter how you block off the hole in the back, as long as its blocked.
 

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Canada, Eh?
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i think what he meant was that you block off the exhaust gas BEFORE it even enters the head. if you just have the blockoff plate on the back, the exhaust gas still gets into the head, it just doesnt go anywhere....

ill keep this idea in mind for my rebuild whenever that may be...
 

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Discussion Starter · #17 ·
Enraged said:
i think what he meant was that you block off the exhaust gas BEFORE it even enters the head. if you just have the blockoff plate on the back, the exhaust gas still gets into the head, it just doesnt go anywhere....

ill keep this idea in mind for my rebuild whenever that may be...
BINGO!

I need to post a pic so people can see what i'm talking about.

You need to block off the port that comes out of the exhaust port, and also the one on the intake plenum. Your left with no EGR, and no cooler plate. Just 2 neatly plugged holes that now prevent the back of the head from heating up.

The trick to keeping the temps down in cyl 6 is to eliminate the EGR and anything associated with it. Block off plates do nothing to prevent heating up the head unless you plug the hole from the #6 exhaust port.
 

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yeah thats me!
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not the clearest picture, or best angle, but are you talking about those two holes left by the EGR, if so Im going to fab my own aluminum block offs, Im not paying 68$ from suprasport/

 

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Discussion Starter · #19 ·
you don't need to do anything to the hole in the head where the egr connected. It just goes through to open air if the plate is off.

The one in the head you have to plug is on the exhaust side. It goes straight through to the #6 exhaust port.

The other one to plug is the one where the egr connected to the manifold.

BTW, total cost for this mod was $2.

You have to enlarge the holes to take a 3/8 NPT pipe plug though, and then tap them.
 
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if you dont remove the cooler on the back, the whole thing is useless. Once the hole on the back is blocked off, "1 and 2" can be left open, those holes are only a pass through for the exhaust gasses.
 
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