Re: Inlet manifold problem/question

[T Berk <tberk@mindspring.com>]

Chris,

This sounds an awful lot like my '84 GTI head I have in my '81. On the
back of the head is a small rubber hose that joined to the air intake in
another life. Prior to or after the TB I forget ( I have a premortem
diagram somewhere ), but it currently is connected to the smaller of the
two valve cover ports, just because it fit.

On the back side of the head this rubber hose is connected to a small
'plastic' junction that disappears into the head.

Might this '84 GTI head have an air shrouded injector setup? 

When I pulled the injectors during the swap and to replace the seals I
did not notice any extra bits on them, in fact I first had the old 1.6's
FI in there and they fit all fine. I never bothered to back the
injectors seat out for inspection.

tia,
TBerk


Chris Coracini wrote:
> 
> this sounds awfully close to the way the injectors are set up in the 16V
> sciroccos.  there is a common air "tunnel" that connects the injectors.
> this is an "air shrouded" engine.  the air-shroud system consist of an extra
> little cap stuck on the end of each injector with a sealing O-ring.  this
> lower O-ring seals against a lower injector insert, also only common to this
> type of engine.  the air passage way connects all the injectors
> together....somehow...  the purpose is for better atomization of the fuel at
> lower rpms.  i'm 90% sure of it.  yeah, that's the ticket...
> 
> chris
> 86 16V scirocco
> 
> > -----Original Message-----
> > From: Ewan Hopkins [SMTP:ewanhopkins@hotmail.com]
> > Sent: Thursday, March 04, 1999 10:00 AM
> > To:   scirocco-l@scirocco.org
> > Subject:      Inlet manifold problem/question
> >
> > This is to anyone who has experience with the type of manifold on the
> > early audi 2.0L engines, i.e. with injector seats in the manifold and
> > not in the head.
> > I have an audi 80 2.0 engine ('92 UK)with this type of head.  There is a
> > channel which links all the injector seats with a hose connector at the
> > TB end of the manifold.  On my engine it is covered with a plug. The
> > plastic injector seats have holes which appear to allow air flow down
> > between the seat and the injector, via this common channel.  Just the
> > other day I saw another audi 80 engine with the same common channel, but
> > in this case there is a hose which plugs in to the bottom of the rubber
> > joint (can't remember what it's called) just before the TB, i.e. it
> > bypasses the TB.
> >
> > Does anyone know what this is supposed to do?  I though I saw something
> > about cooling the injectors but I'm not sure. There is no Haynes manual
> > for that series of Audi so I'm stuck for information about the engine.
> > I do have a problem with slight pinking if I've been stuck in a traffic
> > queue for a long time, which always goes once I get going again.  I
> > don't know if maybe this has something to do with that.
> > I'd appreciate any help on this.
> >
> > TIA
> > Ewan Hopkins...
> >
> > '85 Storm 2.0
> > '86 GT 1.8


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