Charcoal Cannister?

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Jetl3on
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Post Tue Aug 06, 2013 12:49 pm

Hi,

what is normal operation for a charcoal cannister? How do you test it is working, when would you change it? No leaks on the floor and looks normal from above, but it is saturated if you reach underneath, and what looks like bits of foam, is this normal?

Thanks
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Brianmoooore
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Post Tue Aug 06, 2013 1:36 pm

??? Charcoal cannister should be a plain, sealed, black metal can with a couple of pipes coming out of the top of it. The underside should just be flat metal.
I wouldn't dream of changing one, but I'd certainly consider binning it, if only to get rid of some underbonnet clutter.
Disconnect the rubber hose that comes from the rear of the car, and tuck the free end into one of the holes in the reinforcement structure for the strut tower. DO NOT block the end.
The other hose goes to a solenoid valve. Disconnect the electrical connector and cable tie it to the loom that goes to the AFM, or just wrap it around the loom.
Remove the solenoid valve, the cannister and the hose between them, and place in bin.
You will now be left with a rubber hose going to the inlet manifold. This hose can be cut shorter, but it's essential that the end is blocked up.
You will now have the same set up as on all non cat. equipped facelift E30s.
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Jetl3on
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Post Tue Aug 06, 2013 2:53 pm

Thats the one, under the AFM, but something must be amiss, there is definitely some soft wet spongy like substance from underneath. I know its to do with emissions, but what does it do exactly and what effect does removing it have, good or bad?

Cheers
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harry_p
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Post Tue Aug 06, 2013 3:03 pm

It's just to capture fumes from the tank, and burn them in the engine under certain conditions.

theyre not needed, and in the grand scheme of things will have zero effect on the environmental impact of a 20+ year old e30.

I would probably do as Brian has said and get rid just because it takes up space and has no real function.

I'm not familiar with e30 ones, but i've seen them on other cars which have a foam underside.
cheers,

harry
jimbom30cab
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Post Tue Aug 06, 2013 4:08 pm

Brian (or other M30 gurus)

Would you know where this
You will now be left with a rubber hose going to the inlet manifold. This hose can be cut shorter, but it's essential that the end is blocked up
attaches to the inlet manifold on the m30b35 engine ?

its really hard to work out from realoem drawings, looks like the underside of the TB ?

thanks