[v12-engine] Suplamental Air Valve hose

V12-Engine
#1

Several people were able to help me identify the supplemental air valve on
my car. Well while fooling with it the hose that runs from it to the
manifold snapped like a dry twig. One person that told me what this was,
indicated that his, is in his attic. My question is, is that alright? I
would really like to hear from someone that knows this engine on whether
this item needs to be in there or if I can just plug the outlets and do away
with it. I know that even though Jaguar put it in there it may not be
necessary. On the other hand I am to chicken to just leave it out and see
what happens. With this car it would probably run perfect for a couple
hundred miles and then blow up. I can just hear the wrecker driver, “Only
time I ever saw this was when the dummy left his SAV unhooked.” Finally if
it is important can anyone tell me what type of hose to replace it with? It
looks preformed but I assume you can use some type of generic hose.

Thanks, Troy
88XJ-S

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EAC 4096 Supplemental air valve hose
#2

Hello Troy,

The hose from the supplemental air valve is indeed a molded item, it is
Jaguar part no. EAC 4096 1, while
you’re at it, you might as well replace the rubber grommet it fits into,
Jaguar p/n C 16393. I know this because
a previous owner had replaced the molded item with a straight hunk of 1/4"
hose, which over stressed the
rubber grommet.

As usual, I was NOT satisfied with the fit of the OEM hose into the manifold
port, so I purchased a plastic
elbow from Discount Auto and with a short hunk of 1/4" hose, arranged a neat
right angle routing of the hose.

Of course, you could probably do the whole thing with 2 plastic elbows,
about 16" of 1/4" hose, and a grommet
from the “HELP!” parts section at D. Auto.

There is more than one way to skin a “cat”!

-Don Buresh, 1991 XJ-S V12 Coupe, Classic Edition, getting a nice NEW
radiator this weekend!----- Original Message -----
From: twamaso@dellepro.com
To: v12-engine@jag-lovers.org
Sent: Thursday, March 29, 2001 6:50 PM
Subject: [v12-engine] Suplamental Air Valve hose

Several people were able to help me identify the supplemental air valve on
my car. Well while fooling with it the hose that runs from it to the
manifold snapped like a dry twig. One person that told me what this was,
indicated that his, is in his attic. My question is, is that alright? I
would really like to hear from someone that knows this engine on whether
this item needs to be in there or if I can just plug the outlets and do
away
with it. I know that even though Jaguar put it in there it may not be
necessary. On the other hand I am to chicken to just leave it out and see
what happens. With this car it would probably run perfect for a couple
hundred miles and then blow up. I can just hear the wrecker driver, “Only
time I ever saw this was when the dummy left his SAV unhooked.” Finally if
it is important can anyone tell me what type of hose to replace it with?
It
looks preformed but I assume you can use some type of generic hose.

Thanks, Troy
88XJ-S

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#3

The hose from the supplemental air valve is indeed a molded item, it
is Jaguar part no. EAC 4096 1

I replaced mine many years ago with a carefully bent piece of metal
tubing and a couple of short pieces of regular hose at the ends for
connection.

while you’re at it, you might as well
replace the rubber grommet it fits into, Jaguar p/n C 16393. I know
this because a previous owner had replaced the molded item with a
straight hunk of 1/4" hose, which over stressed the rubber grommet.

Yeah, that’d be bad. My original grommet seems to still be OK.

As usual, I was NOT satisfied with the fit of the OEM hose into the
manifold port, so I purchased a plastic elbow from Discount Auto and
with a short hunk of 1/4" hose, arranged a neat right angle routing of
the hose.

Aaaaargh! My bent tube is looking like a better idea.

Of course, you could probably do the whole thing with 2 plastic
elbows, about 16" of 1/4" hose, and a grommet from the “HELP!” parts
section at D. Auto.

That’d work. Anybody wanna talk about how to make it really pretty?

– Kirbert
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http://www.jag-lovers.org/cgi-bin/majordomoOn 29 Mar 2001, at 19:41, Donald C. Buresh, Jr. wrote:

#4

Hi Kirby,

May be I should clarify myself. I’m using the OEM hose and grommet, but
instead of trying to make the 90 deg.
bend to the hose barb under the manifold, I cut the OEM hose just a bit
shorter, stuck the elbow into it, and used
about a 1-1/2" length of 1/4" hose to make the connection from the elbow to
the manifold. This way nothing is trying
to make a sharp bend, especially near the hot water rail, and nothing rubs
either. Quite tidy I think.

kind regards,

Don Buresh, 1991 XJ-S V12 Coupe, Classic Edition----- Original Message -----
From: “Kirbert” palmk@nettally.com
To: v12-engine@jag-lovers.org
Sent: Thursday, March 29, 2001 9:22 PM
Subject: Re: [v12-engine] Suplamental Air Valve hose

On 29 Mar 2001, at 19:41, Donald C. Buresh, Jr. wrote:

The hose from the supplemental air valve is indeed a molded item, it
is Jaguar part no. EAC 4096 1

I replaced mine many years ago with a carefully bent piece of metal
tubing and a couple of short pieces of regular hose at the ends for
connection.

while you’re at it, you might as well
replace the rubber grommet it fits into, Jaguar p/n C 16393. I know
this because a previous owner had replaced the molded item with a
straight hunk of 1/4" hose, which over stressed the rubber grommet.

Yeah, that’d be bad. My original grommet seems to still be OK.

As usual, I was NOT satisfied with the fit of the OEM hose into the
manifold port, so I purchased a plastic elbow from Discount Auto and
with a short hunk of 1/4" hose, arranged a neat right angle routing of
the hose.

Aaaaargh! My bent tube is looking like a better idea.

Of course, you could probably do the whole thing with 2 plastic
elbows, about 16" of 1/4" hose, and a grommet from the “HELP!” parts
section at D. Auto.

That’d work. Anybody wanna talk about how to make it really pretty?

– Kirbert
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#5

Came across this older thread while looking to replace my old EAC4096 hose. Can I just use silicon vacuum hose or should I look at coolant or fuel line?

Thanks!

#6

A vacuum purposed thick walled Silicone hose will do just fine but nothing too soft that might collapse under vacuum.
Otherwise, any hose will do, it’s just air that goes through.