Lets talk about EGR blanks

[Shane]

My lux has 60k km on. Still fairly new.

When I replaced the head gasket on my Troopy I saw the effects of the gunge build up.

So I'm considering doing it on my Hilux.

Is there ant reason NOT to do this?

Who has blanked off their EGR's?

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[HenriSteyn]

I have done this on my Pajero. The build up of gunge after 80 000 km was frightening.

No ill effects were experienced, but one is supposed to get a marginal improvement in consumption.

I believeome vehicles the engine management light comes one.

Give it a shot and see, it can only be good for the engine

[Shane]

Ok so this is what I could find on the Toob...

Ot seems that the decision is not that clear cut after all....

Blanking this off could actually increase EGT's



https://youtu.be/XDVuKEV7oE8

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[Mad Manny]

Surely a discussion about Oil Catch Cans must be part of this debate?
Also, I think you need to stress that this is a Diesel Vehicle discussion.


Ant 4Gee & Grips will give us fantastic input - but I know both are a bit hectic at present...

[Shane]

I was still getting to the catch can.....


Although I think we might have discussed this some time ago.

Would like for the heavy hitters to weigh in on this.

[Shane]

Come on Chaps!

Is there no one else on this forum with knowledge on the topic - or at least an opinion?

[LesseW]

Look i cannot give an opinion since I am not familiar with this, what I can say is that after my children’s tantrums this morning I wish I shot blanks back in the days…


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[Ricof4e]

Shane, there is a saying: fiddle fiddle f#cked...

Although I can understand the issues that can arise from a blocked or faulty EGR, the power increase on a diesel is but marginal (if that is what you are aiming for).

EGR blanking should be the last resort. On most modern diesel engines (and yes, I include that unrefined clattering overrated donkey of a Toyota 2.8), software optimization (ECU remap) and (as Manny correctly pointed out) oil catch cans should be your first consideration before attempting an EGR blank.

In my view, the best compromise would be to retain the EGR valve (as it does serve a purpose and it makes Greta drip like a percolator) but to modify it to strike a neat balance between the usual EGR side-effects and to ensure that the engine reaches operating temperature as quickly as possible.

But to simply just consider a blanking plate, you should take cognizance of the following:

1) Cold diesel engines have greater wear and tear and takes longer to reach operating temperature with an EGR blanking plate. Just sit for a moment and think about how many times you cold-start your Toyota - the additional wear and tear in my view adds up over a 4-5 year period.

2) If you have a turbo leak (oil getting past the turbo seals and into your deleted EGR intake), it could result in engine runaway. Remember, an EGR has a valve which stops air from entering the intake once you turn the key off, thus suppressing possible oil burn and engine runaway.

If you don't abuse your Toykaka, drive it like a sane person would and do regular maintenance, an EGR will not let you down. Contrary to popular belief, those clever okes at Toyota knew what they were doing when they designed the engine.

So there you have it, my non-expert opinion. Please take notice that I allow myself to be sensible once a day and ^ was it. I'll be my usual clown-self for the remainder of the day.

[Shane]

@Ricoffy - you spelt Toyota wrong....

My aim is not power gains - but rather lifetime performance/health.

You have echo'd many of the thoughts that have gone through my mind regarding this. So thanks for that.

With regards to engine wear - it's something I have been puzzling over for quite some time.

It's true that it will probably take longer for the engines to reach working temps. But then I think back to the pre-emissions era. AFAIK older vehicles did not have these EGR's and had no problems doing 500 000 - 1 000 000 km's?

So how does the long term carbon build-up compare to the effects of an EGR delete wrt damage and life time engine health?

This is what I'm tryimg to find an answer for.
I ubderstand that there is no factual answer.

But it's still good to hear the opinions of those with a bit of knowledge.

I will eagerly anticipate your sensiblw comment tomorrow - given that you're done with that for the day .

By the way your FROD thread needs updating

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[Shane]

Look i cannot give an opinion since I am not familiar with this, what I can say is that after my children’s tantrums this morning I wish I shot blanks back in the days…


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I'm sure we have all been there - barring those who DO shoot blanks!

[Ricof4e]

Most diesel engines has had some sort of EGR configuration since the 90s.

But, "modern" diesel engines operate under higher pressures to achieve decent power and torque output, but with smaller dimensions and more efficient fuel usage.

If you drive like a sane person, a "modern" engine will last 500k km.

[BushWacker]

… intuitively an EGR circuit results in some exhaust
recirculation that substitutes for some of the fresh air intake and it also recirculates some carbon, S etc
… its there to reduce the concentration of NO2
emission out from the exhaust pipe.
Intuitively it constrains performance and raises the temp and pollutes the ‘air’ feed to the cylinders.
Its difficult to see any benefit for us other than its intended purpose which is to meet emission tests/‘standards’.