walter acker IV wrote:> i have been reading about the AAV mods or repairs and i looked in the
mitchel book and the aav valve from a volkswagon is a electricaly heated
bimetalic type of aav that might be able to be adapted to use in the jag
system powered by the fuel pump relay so that there would only be power
when the engine is running it does not use the cooling system for
operation in any waywalt
walter acker IV wrote:
i have been reading about the AAV mods or repairs
and i looked in the
mitchel book and the aav valve from a volkswagon
is a electricaly heated
bimetalic type of aav that might be able to be
adapted to use in the jag
system powered by the fuel pump relay so that
there would only be power
when the engine is running it does not use the
cooling system for
operation in any waywalt
I gave my wife an enjoyable sweetest day treat by
touring a junk yard today. Sure enough, almost every
Bosch injected VW and Volvo had this bi-metallic AAV.
For $5.00, I got the AAV, and also a combination idle
speed control valve/ A/C idle up valve unit. This unit
mounts near the engine and is piped across the
throttle body with 5/8" diameter hoses. Mine came from
a Volvo DL.
The AAV is a pot metal assembly with a shutter
arrangement that closes from the heat of either an
internal heating element (that only draws 1/4 amp), or
from the latent heat of the engine itself. That way it
will not automatically start up at high idle with a
warm engine. It takes about 2 or 3 minutes for it to
choke down to a minimal (but not 0) flow. It also has
a lockable adjustment to set the maximum flow when
cold.
The idle speed setter/ A/C solenoid is an “H” shaped
composite plastic piece that has a fine threaded
knurled knob at one end. It adjusts down to 0 flow.
The solenoid is also a low current design (60 ohms)
that bypasses the knurled adjuster. This unit is
mounted and supported by the four hoses that attach to
it.
Both units hose together in parallel and are small
enough to mount in many places on the Jag. There were
some units that did not have the A/C solenoid, but I
saw at least 10 of these things in various “non bug”
VW’s and Volvos. They were either sitting in the
valley of a v block, or attached to the intake
manifold.
I’ll try it out Sunday.— walter acker IV walter@slip.net wrote:
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walter acker IV wrote:
walter acker IV wrote:
i have been reading about the AAV mods or repairs and i looked in the
mitchel book and the aav valve from a volkswagon is a electricaly heated
bimetalic type of aav that might be able to be adapted to use in the jag
system powered by the fuel pump relay so that there would only be power
when the engine is running it does not use the cooling system for
operation in any waywalt
Walt,
you would have to add an idle speed adjustment somewhere. I
don’t
think those valves have any.
Walterwalter acker IV wrote:
walter acker IV wrote:
i have been reading about the AAV mods or
repairs and i looked in themitchel book and the aav valve from a volkswagon
is a electricaly heatedbimetalic type of aav that might be able to be
adapted to use in the jagsystem powered by the fuel pump relay so that
there would only be powerwhen the engine is running it does not use the
cooling system foroperation in any way
waltWalt, you would have to add an idle speed adjustmentsomewhere. I
don’t
think those valves have any.Walter
I tried the Volvo DL setup I got from the junkyard the
other day. The idle speed setter worked great,
however, I’m affraid that the AAV itself is undersized
for a 5.3 liter motor. By the time I got everthing
stabilized, the motor was up to temp along with my
garage. This would not allow the AAV to open back up
again to see its effect on RPM’s, but I have a feeling
it won’t be enough. I left it installed on the car and
will try again late tonight or tomorrow. Unless its
clogged, the A/C kicker solenoid on it provided
little, if no, idle up.
What is the correct idle speed at the onset of a dead
cold start with the AAV wide open?— Walter Petermann corsaro@brokersys.com wrote:
=====
I don’t practice what I preach
because I’m not the kind of person
I’m preaching to.
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
-----Original Message-----
From: joe bialy
I tried the Volvo DL setup I got from the junkyard the
other day. The idle speed setter worked great,
however, I’m affraid that the AAV itself is undersized
for a 5.3 liter motor. By the time I got everthing
stabilized, the motor was up to temp along with my
garage. This would not allow the AAV to open back up
again to see its effect on RPM’s, but I have a feeling
it won’t be enough. I left it installed on the car and
will try again late tonight or tomorrow. Unless its
clogged, the A/C kicker solenoid on it provided
little, if no, idle up.
What is the correct idle speed at the onset of a dead
cold start with the AAV wide open?
Joe,
You are an awesome guy to go out and do this in one weekend. I think some
(any) auxiliary air might be enough for those of us who live in moderate
climes.
I have a spare Bosch electric/thermal AAV kicking around, maybe I’ll try the
same trick.
Greg “eagerly awaiting your results” Meboe__________________________________________
NetZero - Defenders of the Free World
Get your FREE Internet Access and Email at
http://www.netzero.net/download/index.html
-----Original Message-----
From: joe bialyI tried the Volvo DL setup I got from the junkyard
the
other day. The idle speed setter worked great,
however, I’m affraid that the AAV itself is
undersized
for a 5.3 liter motor. By the time I got everthing
stabilized, the motor was up to temp along with my
garage. This would not allow the AAV to open back
up
again to see its effect on RPM’s, but I have a
feeling
it won’t be enough. I left it installed on the car
and
will try again late tonight or tomorrow. Unless
its
clogged, the A/C kicker solenoid on it provided
little, if no, idle up.
What is the correct idle speed at the onset of a
dead
cold start with the AAV wide open?Joe,
You are an awesome guy to go out and do this in one
weekend. I think some
(any) auxiliary air might be enough for those of us
who live in moderate
climes.
I have a spare Bosch electric/thermal AAV kicking
around, maybe I’ll try the
same trick.
Greg “eagerly awaiting your results” Meboe
NetZero - Defenders of the Free World
Get your FREE Internet Access and Email at
http://www.netzero.net/download/index.html
I finally got to see the electric AAV work from a cold
start this afternoon. It was a little harder starting,
and when it did kick over, it idled at 500 rpm. After
about a minute it made its way up to 750-800 rpm and
stayed there the rest of the time. Driving for the
first few minutes was also not as smooth as it was
before. The Jag AAV would cold idle at 1100-1200 rpm,
then most of the time it would throttle down to 800 or
so.
I took the electric AAV apart today. It has a spring
loaded phenolic shutter with an arm that pushes
against the side of a rather substantial bi-metallic
strip. The spring wants to close the shutter, while
the strip keeps it open. As it heats, it bends
allowing the spring to choke the flow off. The
adjusting nut allows the shutter pivot to move in
relation to the strip and the inlet port. This would
adjust the cold idle setting.
My next activity will be modifying the adjustment slot
to provide more cold air flow. It appears to have a
lot of room for movement. I could also whip up another
phenolic shutter- its about 3/32" thick, and easily
modifiable for different pivot points and/or opening
configuration. As it is now, when cold, it is only
about 1/3 open.— Greg and Dianne Meboe meboe@netzero.net wrote:
=====
I don’t practice what I preach
because I’m not the kind of person
I’m preaching to.
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com