Anyone know what this part is called?
Moderator: martauto
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Tineca
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This goes between the vacuum advance on the dizzy and the inlet manifold. Anyone know its name?
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flybynite
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it's called "Valve" part number 11731705584
Only fitted post 09/84 (which is why mine does not have one) They are NLA and I suspect it can be safely replaced by a straight through piece of tube
Only fitted post 09/84 (which is why mine does not have one) They are NLA and I suspect it can be safely replaced by a straight through piece of tube
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Tineca
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I guess its like an anti pulse valve to smooth the vacuum between the distributor and the manifold?
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MikeBM299
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It's a 2/3 way valve. Mine was removed at some point and I have a new one to install but do not know where it is attached to. Can you tell us where it was attached to and in which orientation the pipes are installed?
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flybynite
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Correct, it will smooth the vacuum pulse as you initially open the throttle and provide a metred leak to the advance side of the diaphram to stop it dropping away to nothing immediately after.
A straight pipe will be better than a leaking or stuck valve but long term it needs something in its place.
It looks like it replaces #12 on the diagram which the older cars like mine have
It is another one of those things they changed to the 323i Jetronic system in a vain attempt to get it to run well.
The valve is certainly only 2-way. The ETK is not very accurate but does show the orientation of it
Is yours an old BMW replacement or a generic one? They are NLA at the moment
ETK is not accurate but in this case it shows connection and orientation
All completely solved by Motronic 1.3
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MikeBM299
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I bought a new one off Ebay Pierburg 7.21056.23.0 which is the aftermarket equivalent to BMW 11731705584 according to Bimmercat. Apparently 320i and 323i ones are different.
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flybynite
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I dont need one but curious where you found them, Can't see any with a quick search? Link?
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Tineca
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flybynite
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Technically that is the 320i one but I guess it would do at a push, however it is also listed as NLA (I even checked Lithuania!) so I would guess that ebay listing is a mistake.
I was more interested in the Pierburg 7.21056.23.0 as I can't find that either
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MikeBM299
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