what's EGR all about

Hello there,
Just wondered if anyone could tell us whats the EGR for, whats the gain in blanking it off, and does it have to be removed when you do the mod.
cheers glenn

In simple terms, cos thats all I understand, EGR is Exhaust Gas Recirculation.
It uses some of the exhaust gases and recirculates the gas back into the engine. The reason for it is to do with emissions. I think it puts carbon back into the engine and burns it a second time or somethin. The ouutcome is that our engines emissions are better, but they are effectively using dirtier air (clean mixed with exhaust recirc) tto burn the fuel.
By removing the EGR, you will make your emissions "dirtier" but your engine will be able to produce more power, as it is only using clean air.
I dont know if Defenders have em, but some vehicles hae EGR cooler, which cools the dirty air down, before mising with intake air. This helps the burn, as the cooler the air, the denser it is, and the more oxygen molecules are contained within it.


Anybody else, feel free to correct, I'm not a mechanic!!!

And no, the EGR system doesnt have to be removed when it's blanked off. the system stays in place, it's just bypassed.

Have a search on LZ - there is LOADS about the EGR and pro and cons. This may help -

Difflock.com: Remove the EGR valve - Land Rover 300TDi

Step by Step guide...

IMO i'd remove the whole thing with a kit as it looks much neater...

glenn wade said:

Hello there,
Just wondered if anyone could tell us whats the EGR for, whats the gain in blanking it off, and does it have to be removed when you do the mod.
cheers glenn

Click to expand...

There's not really any gain in blanking it off. Unless it malfunctions, what happens is the diaphram in the valve goes weak, so the valve opens too soon. Upshot is you get excessive smoke from the exhaust.

Fix is either blank it off, or just block off the control feed pipe to the valve (a small ball bearing does the trick).