Anyone Blocked off their EGR

Brando

Brando

Brando

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Joined
28 Oct 2002
Posts
455
Location
Cornwall, UK
As title. I'm blocking mine off this weekend (VW T4 2.5 TDI), a lot of owners and members of the T4 club have done it and suffered no ill effects. Most gain a couple of mpg and use this as the final stage before a re-map or further performance increases.

I just wondered if any other modified TD/TDI owners also do it?
 
I've disabled mine on the HDi, I unplugged the power to the Solenoid which lets the exhaust gasses recirc..

Can't you do a similar thing on yours ? Rather than ripping it all out and welding blanking plates over the inlet and exhaust manifold.
 
I'm taking it out to clean it and putting a pre-made blanking plate back in when I re-fit it. No need to weld anything thankfully :D. Fortunately a club member supplies the vw gaskets and blanking plate with a can of clutch cleaner for £7.50. Less than VW would sell me the gaskets for.
 
Club members are awesome, everyone helps people out :)

If you think that your Inlet manifold is clogged up with all the nasty sludge the EGR lets through then you should by either a can of " 10k Boost " or " Carbon Blaster " you spray it down the air intake ( After the MAF !! ) and it makes all the crud fall off and pass through the engine, its supposed to give some good results :)

10k Boost is sold at Halfords,

and Carbon Buster I found on the Diesel Bob website :)

EDIT - I noticed reduced engine noise ( Odd ) and the car picks up quicker ( Before it used to go, then hesitate, then go )
 
ive done mine too, tbh i think the effects are mainly placebo :p maybe turbo spools up the tiniest bit quicker but thats it :p

i did mine mainly to protect my engine more than anything, luckily i disabled it at when i got her at 40k so shouldnt be so bad :)
 
Placebo is good :D. Cheers for the 10k boost trick Taken. Most of the club use the old 4k rpm natural cleaning trick over a few miles :D and some uber keen members have taken the inlet manifold off to clean it properly. A can of 10k boost would help it along nicely.

Also flushing my intercooler and cleaning up it's pipes. Stupid crank case breather.... That may be next to be re-directed (to a catchment tank of some form of course).
 
noticed no difference here, nope.

the only advantage of having one is the shorter time it takes for the engine to warm up in the winter. so some people therefore plug it back it during the winter... IMO it isnt worth it though for the damage it can cause, just do it :)
 
Bit of a n00b question, why's everyone blocking it off? I've read about people doing it before but never the reasoning behind it...what purpose does it serve and how does taking it away benefit? :)
 
Removing the EGR means your Nirous Oxide emissions will go up. However as mentioned you should see an improvment in MPG.


Ripped from some of my work on it:

EGR replaces air, reducing oxygen availability within the combustion chamber; this has the effect of reducing air fuel ratio and combustion efficiency. There is a trade-off between NOx reduction due to EGR and soot emissions. Running higher levels of EGR creates more soot and therefore the DPF needs to deal with the increase in PM (soot) emission. To maintain O2 availability then boost pressure needs to be increased to provide additional air supply and also counteract the density reduction of the charge air due to the hot EGR temperatures. To maintain torque in this combustion system more fuel is required, approximately 4% on the XXXXX drive cycle.
 
basically recycles your exhaust gases back through your engine to keep emissions down... however if you look at the components inside after a good few years of having the EGR connected, you will see just how much crap builds up. Its been known on few engines as a silent engine killer.

more advisable on diesel engines, not too sure about petrol...
 
fonzee said:
basically recycles your exhaust gases back through your engine to keep emissions down... however if you look at the components inside after a good few years of having the EGR connected, you will see just how much crap builds up. Its been known on few engines as a silent engine killer.

more advisable on diesel engines, not too sure about petrol...
Click to expand...

Very few petrol engines run External EGR, most will be done 'internally' via valve train adjustment
 
My 306TD was one of the early models that didn't have one. No CAT either which is handy

Later models were fitted with them and the 1.9 doesn't take kindly to them as it wasn't designed with an EGR in mind.
 
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