Thread: EGR kits,, do not buy!!!

My understanding of EGR systems (its been round for 30 odd years in oz) is the gases are recirculated to the engine at idle to help burn the unused fuel. (not all fuel is burnt at idle ) Its this cold state of the engine when first started that pushes it past the emission levels required. And is the main reason for viscus fans.(faster warm up) I studied this back in 1980 and not much in EGR systems have changed since than. Oh and I did pass.

Originally Posted by Zute

My understanding of EGR systems (its been round for 30 odd years in oz) is the gases are recirculated to the engine at idle to help burn the unused fuel. (not all fuel is burnt at idle ) Its this cold state of the engine when first started that pushes it past the emission levels required. And is the main reason for viscus fans.(faster warm up) I studied this back in 1980 and not much in EGR systems have changed since than. Oh and I did pass.

thats about it, same time they cut down on the amount of cooling fluid in the block & head, aluminum heads sort of became mandatory etc

the comment on wikki about adding mass to the combustion chamber and that hasn't been covered so far in this thread, is logical but the problem is that the gas's being recirculated are almost already at such a high temp that it negates much of the supposed benefits, the benefit now being in the percentage of gas recalculated which in itself is a percentage of the volume due to its already expanded state add to that only a percentage of the gas is modified in the combustion chamber.

a dubious addition in the TD5 because surly the mapping could take care of partial or light load emissions. i suspect that its only there for worm up or a faster worm up

Originally Posted by Dougal

DPF's sort out the soot and EGR cooling gives back the combustion efficiency.

Contemplating removcal of EGR from SWMBO's D2 and am following this thread closely. Been very informative so far.

One question............What's a DPF ?

Deano

DPF

Diesel Particulate Filter.


or typo for PDF which is that wierd ass adobe acrobat document format

Originally Posted by DeanoH

Contemplating removcal of EGR from SWMBO's D2 and am following this thread closely. Been very informative so far.

One question............What's a DPF ?

Deano

Yarr, Diesel Particulate Filter (aka soot trap). You're not likely to find one on a D2.

Not qualified to get into the tech debate here so I won't. But as a D2 owner with a Td5 towing a camper at about 1.4 tonnes fully loaded...... the difference is NOT neglible....it's ****ing great!
Yes mine is chipped, bu the difference was DEFINITELY noticable after doing the EGR as well.
JUST DO IT

Originally Posted by wardy1

Not qualified to get into the tech debate here so I won't. But as a D2 owner with a Td5 towing a camper at about 1.4 tonnes fully loaded...... the difference is NOT neglible....it's ****ing great!
Yes mine is chipped, bu the difference was DEFINITELY noticable after doing the EGR as well.
JUST DO IT

so that sort of says it all

I blanked mine off (using an alternative no cost method) for the primary purpose of stopping all the crud entering the engine and causing damage and for this alone. I was amazed the crud that I cleaned out. Now even those of us without formal mechanical training know that any of this crud and oil blow by entering the top end of the engine will do damage eventually.
As a bonus there was a very minor increase in light throttle response.
The fact that it is also expensive to fix the EGR every time it jams also played a part.
As said all manufacturers build an engine to last a finite life, so you have to buy more and so on. That is not disputable as it is economics. However a lot of smart people come up with modifications to increase engine longevity.