Colored hoses, Are they still available? Or has anyone tried dying a hose? Options

[TonyA]

Maybe i ma crazy but are these available anywhere, or has anyone ever attempted to bleach and dye a hose?

[wonkipop]

a couple of guys have pulled the earlier metal cans apart on the samba forum.

go here.

https://www.thesamba.com/vw/forum/viewtopic...asc&start=0

however the guy admits his photo of interior parts may not be laid out in the order they go in on the inside.

it is kind of clear from another post, done by a guy who just drills a hole in one end of the can to empty it (the end with the two lines) that there is a stack of perforated metal screens hard against this end.

between the two sets of information you can infer there are three layers, two perf screens and a filter layer sandwiched between hard against the end with the vapor line. there is a small hole in each of these to let the vapor line pass through. the vapor line has a pinched end and is almost closed over, but it can admit fumes. i guess it is pinched to stop charcoal getting squeezed down it and blocking it?

unlike later plastic cans, the metal can vapor line extends into the interior of the can.
the bigger port for the larger hose at that end stops at the surface of the can behind the filter and perforated metal screens. (this matches how the can is drawn in most of the emission system schematics).

thats the opposite of the plastic ones. the vapor line stops at the surface of the can and has a filter in front of it and the larger port extends in to be surrounded by charcoal.

at the other end is metal mesh screen and two layers of filter material. one is a fine screen the other is a coarse screen - looks like it might be steel wool. this compresses down on the charcoal using two smaller springs and not a single bigger spring as per the later plastic ones. essentially though in design its the same as the plastic cans.

the metal can uses more components and material.

the plastic version has fewer internal components and is simplified = less cost.

both designs have a "plenum" chamber at one end created by the spring or springs and which also compresses the charcoal. that chamber only has one large port feed in both.

never seen a metal can in the flesh. maybe it just has the one part # because its not meant to be disassembled.

the plastic can theoretically is designed to be serviceable. the plastic securing tabs in the end piece can break when you take them apart. perhaps the separate part # on that is so that dealers servicing the can (refilling charcoal) could put a new replacement end on if they broke the tabs on the original disassembling. could also be just for variations on the theme using the standard body - the later kombi plastic can has an L shaped entry port to clip the hose on rather than the straight port thats on the 914.

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VW part # 171 201 801 is for a golf (or rabbit in usa?).

its closer to a cylinder rather than the flattened can in the 914s.
its got the three port arrangement. two at one end, one at the other.

this looks to me like a one piece unit again not intended to be serviced. cheaper to replace whole unit than labor costs of taking it apart?