anyone knows why is this? see pic.

[budweiser]

i was checking where is a diesel leak and i saw this, see pic.
anyone knows why is this? cable tie? what it does???

[Albannach]

It's the vacuum supply to the EGR. it's been removed to disable the EGR, and tied like that to seal it.

[budweiser]

great thanks

[NiftyNev]

It's the vacuum supply to the EGR. it's been removed to disable the EGR, and tied like that to seal it.

No, it's the vacuum supply for the small butterfly which closes partially and allows EGR operation along with the vacuum supply to the EGR valve. Disabling this is not necessary and only creates more problems, including rough engine shutdown.

Both vacuum hoses to the dual diaphragm need to be connected so the butterfly closes on shutdown. The small butterfly will not operate at all with botton hose disabled. The correct way to disable the EGR is at the EGR Valve itself and leave all other hoses connected. If EGR Valve is suspect and possibly not closing or leaking, then blanking plates will be necessary.

Nev

[NiftyNev]

Here's some info regarding the VSVs which are under the manifold.

http://www.toyotasurf.asn.au/forum/v...ic.php?t=25419

Nev

[Albannach]

No

I stand corrected; again

Although, in my defence ... ach, why bother

[budweiser]

great thanks. dont need to sorted just leave as it is. shame i just put blanking plates on the egr

[Rustinho]

great thanks. dont need to sorted just leave as it is. shame i just put blanking plates on the egr

This shows how the vacuum pipes should be connected if you've blanked off the EGR:

http://daemon4x4.org/portal/articles.php?rid=6

[budweiser]

great

[NiftyNev]

great thanks. dont need to sorted just leave as it is. shame i just put blanking plates on the egr

Unless you have removed the VSVs associated with the EGR Valve and the Small Butterfly and done the modification as per the above link then you need to remove the zip tie from this hose, otherwise you may end up damaging engine mounts because of the rough engine shutdown.

The article linked to, disables the small butterfly at all times other than engine shutdown. I don't like this and prefer just to disable the EGR Valve itself and still allow the small butterfly to partially close on decelleration to aid engine braking and close at shutdown.



Nev

[knicko]

more importantly .... whay have you got a finger cable tied under the bonnet?

[budweiser]

Unless you have removed the VSVs associated with the EGR Valve and the Small Butterfly and done the modification as per the above link then you need to remove the zip tie from this hose, otherwise you may end up damaging engine mounts because of the rough engine shutdown.

The article linked to, disables the small butterfly at all times other than engine shutdown. I don't like this and prefer just to disable the EGR Valve itself and still allow the small butterfly to partially close on decelleration to aid engine braking and close at shutdown.



Nev

this is what i have done http://toyotasurf.asn.au/techsite/egr.htm
and then 6month later realized that cable tie (with FINGER not included)

[NiftyNev]

Start the engine and watch as you turn ignition off. Remove the cable tie and do the same again. See if the engine shakes less with cable tie removed.

Nev

[budweiser]

Unless you have removed the VSVs associated with the EGR Valve and the Small Butterfly and done the modification as per the above link then you need to remove the zip tie from this hose, otherwise you may end up damaging engine mounts because of the rough engine shutdown.

The article linked to, disables the small butterfly at all times other than engine shutdown. I don't like this and prefer just to disable the EGR Valve itself and still allow the small butterfly to partially close on decelleration to aid engine braking and close at shutdown.



Nev

done it, but not much difference, (or is just me looking for drastic difference)