Re: 78 MGB Charcoal Canisters and the some.....

Rev. Mark McDowell

Here are some pictures of the setup I have.

The first picture shows the line coming up from the tank to the vapor recovery canister. The second and third show the metal loop that is on the inside top of the trunk (boot) and where it leads down to run under the car. The fourth picture shows the vapor line from the Weber carb to the charcoal canisters. The fifth shows the charcoal canisters and where the line comes up from under the chassis. The bottom of the left charcoal canister had a tube that ran to the anti run-on valve which is useless with the Weber.
You will note that I have also removed the windshield washer fluid reservoir and pump in addition to the anti run-on valve and associated tubing. If you would like any of that I have it on a shelf in the garage (it was all fully functional at the time of removal).
Let me know if you have any questions that I may be able to answer.


On Mon, Jun 27, 2022 at 9:36 AM, Rev. Mark McDowell via
<marksmcd@...> wrote:

I still have the recovery set up as best as possible with a Weber. I will take some pictures and diagram and stuff when I get home and send you the results.


On Mon, Jun 27, 2022 at 6:44 AM, James J Schulte via
<schultejim@...> wrote:
It's good you get to vent your gases here...a little MG humor. Hope you solve your problem. Good to see you Saturday.

On Sun, Jun 26, 2022 at 4:36 PM, Jeff Detwiler via
<nsp7919@...> wrote:
Hi All,

First, a very appreciative Thank You to all with your vast expertise albeit personal 
experience or where to find answers and resources of knowledge regarding our unique LBC's.
I was up until the wee hours last night thumbing thru posts-upon-posts on
intrigued by the number of ideas (and folks who have been down this path before me).
I had never thought to go surfing there - Thanks Pastor Mark for your input as well
as others with photos from your MG or past repairs.

One tenet thru all of my reading that caught my attention was to not just jump to the 
easiest or cheapest solution right-away.  Some threads suggested "why not just restore 
the original Vent system?"  Hmmm - that sounds like a lot of effort, especially if it was
removed for a very good reason a long time ago by someone more of a mechanic than I.

Yes, here is where I have to digress for a moment since success does have it's mini rewards.
Well, Mary and I got the MG out early this morning and we took a drive up River Road 
thru New Hope and had breakfast at the Lumberville General Store.  
The MG once again ran like a top (Yippie!).
We got home and I opened up the (boot) for a look see - perfectly dry (Whew!)
Gas tank was also down 1/4 after a 55 mile RT.  So, I am currently clear of the tank 
being too full for the time being.
Next, I popped open the engine (i.e. bonnet) and started to refresh myself with all of 
the original Emissions elements I had been reading about last night.

I knew some bits were still there, but "if it ain't broken - don't fix it".
So, for many years I have mostly overlooked many of these component parts since 
they have not been my main headache nor needed my attention (I thought).
Surprisingly, I found more there than I truly thought would have helped me if I were
to possibly tackle the idea of maybe why not "restore the original Vent system".

With all the and Moss motors diagrams and a few snapshots (see attached),
I believe I have 90% still in place to possibly make the "Vent system" whole.
As you will see I need to figure out where a few pieces go.
So once again, I could use a little help, maybe a photo from yours if similar to get 
me in the right neighborhood.

In particular, since I have a Weber downdraft Carb set-up, I am not sure from the 
Moss diagrams where (Hose #62) goes after it leaves the ARO valve.
I remember (Hose #64) went to the front radiator bulkhead for fresh air, I believe.
Unfortunately, I do not know without crawling thru my attic (probably 105* today) if
I still have the original (Vapor Separator #76) nor the undercarriage tube (Tube #83).
Bad news too, Moss sez these are (Unavailable)....... Hmmmm
Boy, I hope they are in the attice.

Otherwise, I think I can regain the original "Vent system" if I can find the few missing bits
and understand where to connect the Anti-Run-On hose once I track down the AWOL pieces.
As before, any suggestions, ideas or comments are all Welcome, I'm all ears (and thumbs.....)

Thanks again for your quick a valuable support,
Jeff (and The Furry Jedi)

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