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RE: Inlet manifold problem/question
Sound like there are quite a few variations on a theme out there. I
don't understand the point of having an o-ring seal at the bottom of the
injector. Where would the air-flow thru the common channel go?
In the meantime, do the following details sound familiar to anyone?
The seats on my manifold are push-in and a good bit bulkier than the
standard 1.8 8v CIS seats - more like the screw-in seats: there is quite
a thick lip round the top. When the injectors are fully inserted, the
tips are level with the bottom of the seat.
The seats have two outer seals. The top one is just under the top lip &
is quite thick. The second is further down but quite a bit thinner.
There are two small (1-2mm) air holes on opposite sides of the seat,
between the two seals.
It looks like there should also be a plastic brace which runs across the
top of all 4 seats and bolts/screws into the manifold, presumably to
hold the seats in place. I am missing this but it was on the other
engine I saw.
A major difference I saw between the manifolds on my engine and the
other similar audi engine was the number of hose connector take-offs -
there were several more on the front of the other manifold and
unfortunately the engine was out of a scrapped car so I don't know how
they should have been connected. The main air chamber of the other
manifold was quite rounded, much like standard VW FI manifolds whereas
mine is more rectangular with ribs & 'audi' lettering cast in the top
surface.
TIA
Ewan Hopkins...
'85 Storm 2.0
'86 GT 1.8
>From: "Chris Chemidlin" <spredhaus@hotmail.com>
>To: Coracin@usdl.com, tberk@mindspring.com
>Cc: ewanhopkins@hotmail.com, scirocco-l@scirocco.org
>Subject: RE: Inlet manifold problem/question
>Date: Thu, 04 Mar 1999 14:03:36 PST
>
>FWIW, This is the same head on my 84 GLI. It has the air shouds
(plastic
>inserts that screw into the head), but uses the '1 seal' style
injector.
>I *think* this is the only year of its type VW-wise. It is NOT listed
>on the VW microfiche!
>
>
>CHRIS CHEMIDLIN
>http://www.spredhaus.com
>http://www.angelfire.com/nj/spredhaus
>58 Type1 Ragtop
>84 Jetta uGLi
>
>
>
>
>>
>>that's interesting because i remember a thread a while back about how
>some
>>cars had the air-shroud system and lower insert but DIDN'T have the
>>air-shroud on the injector. maybe VW had some overlap in production?
>>coincidentally, i believe it was an 83 or 84 scirocco... hmm...
>>
>>chris
>>86 16V scirocco
>>
>>
>>> -----Original Message-----
>>> From: T Berk [SMTP:tberk@mindspring.com]
>>> Sent: Thursday, March 04, 1999 1:34 PM
>>> To: Chris Coracini
>>> Cc: 'Ewan Hopkins'; scirocco-l@scirocco.org
>>> Subject: Re: Inlet manifold problem/question
>>>
>>> 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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