Pre-cat heater valve

[chaand]

A couple of questions for you Pre-catters if you don't mind.
My 1992 Griff appears to have lost its heater valve (the one that controls the water flow to the heater matrix) so I'm trying to confirm where the new one should fit - the wire that controls the valve motor is not connected to anything. Always thought it was a bit hot in there!

I understand that the valve on a 1992 pre-cat is supposed to be alongside the transmission tunnel in the passenger footwell and not on the left hand side of the footwell, as on later cars.

The picture shows the pipe arrangement with the pipes running forward from the heater matrix and over the fusebox. Looks like a disaster waiting to happen with the pipe clips clanging on the fuse box but I've removed the carpet padding that separates them for the sake of the photo.
You'll notice there is a short section of rubber pipe which has shinier jubilee clips than the others - is this where the valve was?
Also, there is a slightly corroded brass H section fitting which appears to connect the pipes - what's the reason for that?

Many thanks in advance

Andy

s

[spend]

Put some silicone over those copper connectors (strip fuse holder) on the fuse box!!!! One of them is battery live - unfused... catching the ecu etc on that will not be very good as well as giving you a wake up call .. even worse you may end up becoming an ugly welder like Cliff

[Hoover.]

Ummmm... where is the big electric motor that controls the heating system?????????

or is mine in the wrong position?????

[chaand]

Many thanks for the replies and photos.

Barreti said:

You're correct with your guess that the short bit of tube forward of the copper 'bridge' is where your heater valve should be.
The copper bridge is there so that when you close the valve the water still circulates even though its no longer going through the heater matrix.

Edited by Barreti on Friday 13th March 23:26

It's odd that the valve should be forward of the bridge piece as you'd think that would stop the circulation when the valve was closed, whereas if the valve was behind the bridge piece (ie on the heater matrix side), that would still allow circulation when the valve was closed.

What do you think? Should I keep my day job and not become a heating engineer?

[Hoover.]

chaand said:

What do you think? Should I keep my day job and not become a heating engineer?

Keep the day job, otherwise you'll end up like "Daz The Plumber" in the Chim forum

[spend]

You are correct, the heater bypass (H thingy) should be closer to the engine, and the heater valve will be on the matrix side of the plumbing.

Down Hoover! its a long way down yet to Daz's level!! AN Other is odds on to beat him anyway

[chaand]

Thanks Hoover and spend.
I'm taking advice from both of you - valve on the matrix side of the bypass and keeping the day job!

[K4000JB]

many thanks ian, i for one would be lost without your vast knowledge and archive

Edited by K4000JB on Monday 16th March 20:17