Re: [xj-s] "77 XJ-S Vacuum hose routing

[Mike Morrin <mikem@southern.co.nz>]

At 02:06 11/07/98 -0700, Douglas J. Maury wrote:
>I am completing the installation of an engine which was removed by
>someone else.  This presents many challenges, one for which I have found
>NO info in any publication.  There are two thermal vac switches on the
>RH side towards the rear of the engine attached to a water line.  These
>each contain 3-4 "nipples".  What goes where? 

I am looking at the parts catalogue, and it has a good diagram (page 1I
11L).  Assuming you don't have the book I will try to describe:  I am
assuming your eninge is before 8S11160, when the California plumbing changed.

The valve near the rear of the engine is labelled "Retard Inhibit" and has
(from the bottom) a hose  going to the port on the front of the throttle
body, a hose which goes to the centre of the other valve, and a hose which
goes to a tee piece and then to the air filter box.

The valve near the front of the engine (with a hex body?) is labelled "Over
Temp." and has a hose going to the tee piece above,  a hose which is the
hose to the centre of the other valve, and a hose which goes to the
distributor vacuum retard module.

A hose from the rear of the manifold goes to a tee piece and thence to the
diverter valve (and somewhere else?).  A hose from the top of each throttle
body join at a tee piece and go to the carbon cannister.

I do not know if the transmission modulator hose goes direct to the
manifold or to the tee piece.

Good luck.

Mike 

1975 XJ-S (no emission controls)
1973 V12 E-type (in the process of reassembly with HE engine).

---

References:

• [xj-s] "77 XJ-S Vacuum hose routing
• From: "Douglas J. Maury" <Dquattro@pacbell.net>

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