EGR valve block off

[Diegothecat]

so did anyone do it over the weekend??

[Quinny34]

Was 2 busy conytemplating man holes....

viewtopic.php?f=6&t=4161&p=52407#p52407

[Ox Man]

lmfao....... another awesomly random comment from you Quinny, i friggen love it!

shake n bake.

[SP2333]

EGR block on a new triton,

1. Increaces power below 2500rpm, The EGR valve steals exhaust gas flow which runs the turbocharger. So it spools up way earlier.. I mean WAY earlier. Makes a huge difference to drivability

2. Stops carbon buildup in inlet manifold

3. Cooler intake charge. = Power

Im interested to look at a Hylux system..

[Ox Man]

Goes into the mechanics on Wednesday to get the other gear fitted (finally), i'll get em to gimme a hand i'll keep you posted.

[Quinny34]

lmfao....... another awesomly random comment from you Quinny, i friggen love it!

shake n bake.

LOL... I love that show.... "Magic Man"

If they do mod your truck Ox, try and ge a pic of the offending area and how they blocked it... Happy to steal ideas shamelessly and use with pride....

[Ox Man]

4 sure!

"Mike Honcho" LMAO

[Hilux Max]

Here's a diagram of the EGR layout on the hilux's that Ive labelled for you guys to have a look at.......



Looks like there are 2 EGR valves....the setup is computer monitored so blocking it off no doubt will trigger a fault code, and if you do block it off where will the builup of gas go? Thats if you blocking it off at the EGR inlet to the manifold, but if you manage to block it off at the exhaust end, then this shouldnt be a rpoblem, except for the electrical signal/sensor.

Yes, in theory, eating a decent meal rather than your own $h!t should make you run harder.......

Hope this helps.

[Quinny34]

Wouldnt you be able to block it at EGR #2 by blocking the vacum hose that controls that valve and therfore stop the suction of EGR dead!!

The gas would go from left to right in the above diag correct...?

[Hilux Max]

Wouldnt you be able to block it at EGR #2 by blocking the vacum hose that controls that valve and therfore stop the suction of EGR dead!!

The gas would go from left to right in the above diag correct...?

No, it would go from right to left, you can see on the bottom left of the diagram the EGR Inlet going into the intake manifold, so it would be coming from the right hand side. You can see the manifold that I havent labelled on the far right hand side that the exhaust would be coming from.

This is where I beleive would be the ideal place to block it from......yeah you might get a warning light come on your dash, but unless it triggers the limp mode, you should feel abit of a difference.

[Hilux Max]

EDIT: Quinny, just been looking over it again, and I beleive I was mistaken and you are correct, it does go from left to right.....it looks like the exhaust gases comes from the side of the head ( EGR Inlet through the EGR Pipe Assy through to the EGR Valve N0.2 where it bends upwards towards the EGR Valve No.1 Assy. This is where it mixes with the intake air coming from the No2 Intake Air Connector (Throttle Body) from left to right on the diagram, down to the cast elbow numbered 25621 and this goes into the top of the Intake Manifold to be reburnt in the combustion chamber.

Therefore......

If your gonna block it off, block it off at the EGR Inlet where the gasket 25628 is, which will stop it coming out of the head into the EGR System. That would be my recomendattion.

You could block it before it goes into the Electronic EGR Assy but I think that would be more of a hassle, plus you also have air coming in from the vacumn tube 25630 on EGR Valve No.2

Hope that makes sense......

[Ox Man]

you the man mmaaxx.i was thinking of blocking it off later, at part no. 25686 or there abouts, however the parts to the left would become clogged with sh!t.

I like your idea.

shake n bake.

[Hilux Max]

OX-Boy!

make sure you keep us well informed of your little experiment.......

[Quinny34]

EDIT:
If your gonna block it off, block it off at the EGR Inlet where the gasket 25628 is, which will stop it coming out of the head into the EGR System. That would be my recomendattion.

You could block it before it goes into the Electronic EGR Assy but I think that would be more of a hassle, plus you also have air coming in from the vacumn tube 25630 on EGR Valve No.2

Hope that makes sense......

I think your right as to the best placement of the blockage.. The vacumn hose on that other section doesn't let air in though... it only actuates the pump to open up the valve..

Question,,,, would this then leave all the crap in the head to be blown out under normal combustion? or clag the head?

[Ox Man]

Mmaaxx, would you know what has happened to Daveo from playtime 4x4? in a past post he dropped your name thats all. and i was going to get him to make it all happen...... anyways sorry for the distraction.

[Hilux Max]

PM sent OX

[Drew]

Any chance of venting it to the atmosphere instead of into the inlet manifold ? The whole unit would still work as it should, just nothing going into the inlet...

[Quinny34]

Any chance of venting it to the atmosphere instead of into the inlet manifold ? The whole unit would still work as it should, just nothing going into the inlet...

You probably right Drew, feed it into a catch can like the ricer boyz do... probably the better option.. I think the some of the Triton boys do this...

[Squid_87]

Which doesnt sound that silly really. The transport boys wouldnt be able to hassle you then

[Carlewy]

Guys,
The main function of an EGR system is to reduce NOx emissions by correcting the AFR. If you think of exhaust gas as being inert gas (i.e. practically no oxygen left to burn) then you can imagine that pumping exhaust back into the engine at part load and idle, you are actually altering the oxygen content to closer match the available fuel at that operating point (i.e. 1500rpm, part load). In the engine that I worked on the EGR fed back in immediately after the throttle (yes we had throttles on diesels to perform a thing called EGR enhancement where you close the intake down to draw even more EGR in to improve EGR at very low loads). It does not run through the compressor side of the turbo (at least as far as I've seen but I haven't even looked at the D4-D setup). I'd go look now but I've got my going out clothes on!

EGR doesn't affect performance as at full load the valves are closed and you're pumping as much boost as possible, that is, provided that the valves are sealing properly. The biggest enemy (in my experience only!) was long idle times. This gives an opportunity for everything in the EGR system to cool down (and in the intake system) which results in deposits forming on the valve and valve stem. We used to have an EGR cleaning routine that ran automatically to pump the valves when the engine was turned off to clean the valve stems.

German taxi drivers were the worst offenders and best test cases. We used to call the EGR test cycle the granny cycle, i.e. someone who never works their engine. The reason the taxi drivers were great is that they'd sit in ranks in the cold and idle their engines for the heater to work, hence everything cools down nicely and has the potential for deposit formation.

Basically, EGR = Euro IV emissions compliance and even Euro V (with a diesel particulate filter in most cases but some companies have done it without DPF).

EGR doesnt' affect performance to any tangible level and the best way to ensure good system performance is to drive your car in a normal manner. Extensive durability and validation testing is always done on these systems and from the brief interaction that I had with Toyota development engineers in my time in the industry they were the most hardcore on quality and validation out of all the brands I interacted with.