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Pollution control

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clyderedmond

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OK, I'm relatively new here and my last MGB was a '71 about 18 years back. I now have a '78 that the previous owner diddle with a good bit. He destrangled the engine by removing the pollution control system. In the trunk, he left the charcoal cannister rattling around but the vapor line basically simply goes into the engine compartment and is open. I would like to remove the canister and plud the line from the fuel tank, but it occured to me that this might cause vapor lock or some other problems. Any thoughts?
Oh yes, there is also a rubber line coming from the front of the engine which I think originally went to the pollution system. It is simply hanging free and seems to blow a bit of an oily discharge. Car runs great though, so don't want to screw it up by tinkering.....Any ideas would be appreciated......
Thanks,
Mike
 
Where in SC Mike? PJ
 
I would recommend reconnecting the evaporation cannister in the boot. It does NOT effect performance of the engine one iota...and will help capture the gasoline vapours that escape the tank. Ditto with the carbon canister(s) under the bonnet.
 
OK, Under the bonnet there are no canisters. The line simply leads into the engine compartment and ????? I suppose vapors will enter, unless I block it. The fellow who did this prior work was performing surgery without "closing" I suppose.
 
The '78 MGB would have had two charcoal canisters on the ledge of the firewall on the right hand side. You may be able to find a used set (or even one), replace the charcoal, and go from there!
 
Understood....but what would be the effect of simply blocking the hose from the petrol tank that leads to the canister in the trunk?
 
Vapours build up in the tank. This is how the tank is vented. How you gonna release the pressure? You have to vent someplace.

/ubbthreads/images/graemlins/smile.gif
 
[ QUOTE ]
live in Mt. Pleasant

[/ QUOTE ]

Wray Lemke lives in Mt Pleasnat - owns Mt Pleasant Radio...he has a whole stable of MG's (B, GT, Magnette, MGA)
 
re: your first question, you don't need to reconnect the carbon canisters under the bonnet. If you leave the vapor seperator in the boot conected to the tank, it will do a pretty good job of eliminiating 90% of the gassy smells. You can leave it disconnected, too, but it will smell "british". To avoid fumes collecting in the tank area, there should be a "hole" through which the seperator lines were routed from the trunk - I simply used that exit, and left it disconected on the other side.

re: your second question, I think you are referring to the crankcase vapor line. it comes from the front of the engine, drivers side - a metal tube that connects to some plates on the side of the motor. The other end of the hose is supposed to connect to the carb, just behind the air cleaner assembly, on the throttle cable side - right where the throttle return spring is supposed to be. I would leave this connected, as it helps to prevent pressure buildup in the crankcase.

So that I don't offend anyone, these are my opinions based on what what I do on my own cars. Some will disagree with me, and I respect their right to do so.
 
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