right, I know a lot of the petrol owners remove various bits of pipework, so I had a look at my diesel.

From what I can determine the follow layout occurs:

vacuum pump -> brake servo (via rigid pipe across the bulkhead)

vacuum pump -> EGR control valve

vacuum pump -> Anti-shuddder valve

vacuum pump -> one-way valve -> vacuum ball

vacuum pump -> one-way valve -> n75 (turbo) valve

However my car isn't quite standard anymore:

- EGR blocked off

- Anti-shudder control arm is broken (my father dropped it on the floor)

Therefore I have re-routed my pipework to bypass the EGR and Anti-shudder valves, giving me:

vacuum pump -> brake servo

vacuum pump -> one-way valve -> vacuum ball

vacuum pump -> one-way valve -> n75 (turbo) valve

To look like this:

The car has been running like this for a few weeks with no (apparent) issues.

Am I doing anything bad for removing these valves from the vacuum side of things (they still have their electrical connections).

Thanks,

Matt

Edited 11 August, 201213 yr by mbames

I dont think so, it seems as though it will just cut down on chances for vac leaks. Do you not miss the anti shudder?

I do miss the anti-shudder, but it wasn't till a few weeks ago did I realise the previous repair had failed. The plastic plunger is no longer attached. We did try gluing it back together when it first broke, but obvious that didn't last.

I guess if I happened to be in a scrap yard and a replacement plunger unit was available I would fit it. However I have a feeling that detaching it from the rest of the EGR assembly is quite hard.

I have now done this and have very little pipe now. Just 1ft from vac to n72 t'd after non return to ball. Then 1 to airbox, 1to turbo. Find it alot better, very small Chance of a leak.

Currently all my pipework is still in place, just bypassed. But I might be tempted to remove it, and just leave the valves attached (and block the ends off so they don't get any dirt in them).