92 spider air plenum: rubber hose becomes loose

[AlfaNeely@domain.elided]

       The hose on my 84 race car kept coming loose.  I tie wrapped it in 
place for one weekend.  I later used black 3M Weather Strip Adhesive to glue 
it in place.
       My problem was at the air flow meter end.  Fred said to replace the 
hose, but that did not help.  I finally chucked the air flow meter in a lathe 
and cut a couple of small grooves in the neck that the rubber slips over.
       If you do not like the idea of glue, try raising the air cleaner with 
some washers underneath.  Also check your motor mounts.  If the engine has 
shifted toward the passenger side, the hose will not be long enough.

       I have also had problems with the metal ring inside slipping.  One 
time I discovered the problem when the engine would not idle.  The hard 
plastic had collapsed and it was sucking air downstream of the air flow 
meter.  I just duct taped over the hole to finish that day at the track.

Ciao,
Russ Neely
Oklahoma City

In a message dated 10/01/2002 10:04:26 PM Central Daylight Time, 
owner-alfa-digest@domain.elided writes:


> Date: Tue, 1 Oct 2002 17:23:45 -0700 
> From: "Church, Marc" <Marc.Church@domain.elided>
> Subject: 92 spider air plenum: rubber hose becomes loose
> 
> I've got a 92 spider with the stock Bosch Motronic setup.
> There is a large rubber air tube that connects the F.I.
> unit (on top of the air box) to a hard plastic tube on
> top of the engine. The connection between the rubber tube
> and the hard plastic tube comes loose often.  I've tightened
> the hose clamp many times but the hose always gets loose. I've
> also noticed that the metal (reinforcing?) ring inside the
> hard plastic tube slides out. I'm not sure whether the 
> problem is due to the hose clamp loosening up, and then the
> ring sliding out, or it is the ring sliding out first making the
> hose clamp unable to stay tight.
> 
> Has anyone else had this problem?  The rubber hose was 
> recently replaced with a new one.  The hose clamp is the
> original italian-styled clamp, and appears to be in good
> condition. 
> 
> I'm tempted to try some adhesive on the metal clamp to see
> if it will stay put inside the hard plastic tube, but I
> don't know of any good candidates off the top of my head.
> 
> Thanks
> Marc
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