EGR, is it needed?

[jered]

What is the importance of runnablility to have the EGR functioning?

Mine is rotted out and need to know if it will be worth my time or money to replace it...

I have completely replaced the exhaust on my campmobile, less the EGR filter itself (mine is rotted out and the pipe connecting to the muffler is gone)... Is it worth the US$100 I have found it for?

does it effect the engine in any manor or simply another part to replace with no ill effect on the engine runability or life?

Let me know and I'll get one if it's a needed part...

thanks.

[VeeDubber]

In fact, EGR, downgrades your engine in performance terms. Because the EGR recirculates exhaust-gas into the inlet, it isn't gonna burn so efficiently. But, on the other side, it's a great method to save the enviroment due to a cleaner exhaust-gas.

So in conclusion:
Is it power what you want? Get rid of it
Wanna save the environment? Replace it

[krukab]

just ditch that EGR !!
My GD type4 engine had one as well,but I had the same proble as you have ... some parts
were in a very bad condition when I bought the fuel injected Type4 engine.
Just make sure that you block off the hole in te central intake manifold (injection),and make
sure that you don't have any exhaust leaks or false (intake)air .. the last problem might/could
kill your engine :eek:

[PerL]

If your bus can get through emmisions inspections (which I understand you have regularly in USA) without the EGR, then ditch it. If you need to have it in place, you need to make it work again. It's as simple as that.

[jered]

yeah it passed yesterday (15 June!)... so I'm happy... I will make a block off plate for it so I don't have issues with it sucking air... might be where I'm getting the high idle from... (hence the air adjustment screw being .5 turns out)...

Thanks for the info...

[Karl]

EGR was designed to lower the 3rd emission: Oxides of Nitrogen or NOx. 1st and 2nd are CO and HC.
http://www.epa.qld.gov.au/environmental_management/air/air_quality_monitoring/air_pollutants/nitrogen_oxides/

Oxides of Nitrogen are formed when the combustion temperature exceeds 2500F. By adding a % of inert material, in this case spent exhaust, the combustion temps drop.

This is a benefit to air cooled engines: It keeps the head temps lower.

And I love what people say about emission control equipment, does not matter if it is an EGR valve or a catalytic converter: "just take it off and throw it away".
Wrong! Even if you live in a non-smog check state or county, you are still violating the Federal Clean Air Act in the USA.

Here is Section 27156 of the California Vehicle Code:

27156. (a) No person shall operate or leave standing upon any
highway any motor vehicle which is a gross polluter, as defined in
Section 39032.5 of the Health and Safety Code.
(b) No person shall operate or leave standing upon any highway any
motor vehicle which is required to be equipped with a motor vehicle
pollution control device under Part 5 (commencing with Section 43000)
of Division 26 of the Health and Safety Code or any other certified
motor vehicle pollution control device required by any other state
law or any rule or regulation adopted pursuant to that law, or
required to be equipped with a motor vehicle pollution control device
pursuant to the National Emission Standards Act (42 U.S.C. Secs.
1857f-1 to 1857f-7, inclusive) and the standards and regulations
adopted pursuant to that federal act, unless the motor vehicle is
equipped with the required motor vehicle pollution control device
which is correctly installed and in operating condition. No person
shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise
any device, apparatus, or mechanism intended for use with, or as a
part of, any required motor vehicle pollution control device or
system which alters or modifies the original design or performance of
any such motor vehicle pollution control device or system.