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(Post Link) post #1 of 11 Old 14-10-08 Thread Starter
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Benefit of EGR valve block?

I wonder which is exact proof that closing of EGR valve is good for benefit in case of JTD engine performance. Or it has some negative consequences?
Thank for your opinions. Dusan.
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Re: Benefit of EGR valve block?

I have done this on petrol turbo's as it increases performance and reduces flat spots.

I have heard that on some diesels though blocking the valve can cause turbo failure due to increased temperatures.

A failed EGR valve recent caused a turbo failure on a friends VW golf last week.

Despite what many people believe EGR can actually increase an engines performance and economy.

Exhaust gas recirculation - Wikipedia, the free encyclopedia
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Re: Benefit of EGR valve block?

never noticed any real gain in performance.

yes it does/can when open slightly reduce the egt's.

Remove the manifold cover to get some air round, my manifold cracked because of heat build up because of this, and the 2bar boost it runs does create some heat too.

I wouldn't worry about the slight increase in heat, not unless your well tuned, running big power and creating lots of heats for reasons other than this.

It stops all the crud being recycled back into the engine, the tar build up that you will see if you look into the inlet manifold.
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Re: Benefit of EGR valve block?

Besides the low or insignificant power increase, block of EGR instalation pipes can be useful because it prevents pollution of the input manifold.
Is the conclusion that EGR pipes to be closed in long term sense?
How closed EGR pipes affect on the engine quiet/stable work?
Cheers. Dusan.
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Re: Benefit of EGR valve block?

shut down is aided by the butterfly in the restrictive throttle body area, leave that connected and this will not change
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Re: Benefit of EGR valve block?

Does it lower the NOx values? Is that a nastie we don't really want in the atmosphere? Just wondered?:
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Re: Benefit of EGR valve block?

It must have been put there for a reason. If the engine was designed to run with a closed EGR valve it would be closed as standard, bunging it up closed will only have a detrimental effect and surely end up breaking something?
 
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Re: Benefit of EGR valve block?

common practice on the new generation transit vans to stick a ball bearing in it! so i've been told! - better performance, less smoke and more mpg!

does the ecu not go bonkers with the egr blocked off? or is this only with DPF equiped cars?
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Re: Benefit of EGR valve block?

On the later cars, like your 159, I think the ECM would pick up the anomalies and throw a fault code. The older the system, the better the chance of it not affecting anything.

I for one would always try to block it. There may be a remap which disables the EGR function on later cars.

I reduction in gunk build up is reason enough for me to block it. Do I care about alledged pollution? No, 25000+ scientists going on record to state that man made climate change is rubbish seems credible. Funny how the only people not to make money from this scam is the enviromental groups- oh, hang on, weren't they being bankrolled by the likes of Ken Livingstone's TfL?

Man made climate change (apart from large scale deforestation) is a lie which enables us to be enslaved by a global tax.

That's my tuppence worth.
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Re: Benefit of EGR valve block?

Further to that, there is an enlightening article in this months 'Bike' magazine which shows the correlation between the effects of lean burn reducing emissions and pushing up fuel consumption as a result. Unfortunately there appears to be so few free-thinkers left in the car world that this type of article on longer features in car mags.
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Re: Benefit of EGR valve block?

Please, pay your the attention to the following link:

https://www.alfaowner.com/Forum/alfa-...egr-sh1te.html

This is, IMO, enough reason for blocking of EGR pipes.
Figure below shows one possibility of closing the EGR valve.
Best regards from Dusan.

Last edited by dusanGT; 28-08-10 at 11:43.
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