I've got a problem with the corrugated alluminium duct / hose which attaches to the demist vents (supplied by CBS)
The hoses are 40mm i/d and they fit snugly onto the 40mm o/d inlet boss, but the ally hose just slips off even when secured with a cable tie as the ally just crushes down. Is there a rubber moulding available to make a better push-fit? I can't have a permanent connection as I need to remove the dash occasionally.

Could you make a ridge or barbs of some kind on the plastic outlet pipe like you have for coolant pipes?

Maybe make a few small slits into the pipe and then use some heat to bend some tabs out. That might be enough to stop the cable tie moving.

could you wrap a bit of plastic insulation tape around the boss to make it just a little bit bigger so that it might hold on better ?
or if the boss is long enough it might even form some sort of lip to pass the duct over and then tie wrap which should stop it slipping of

failing finding a rubber moulding, how about glueing a piece of bike inner tube on the boss and forcing the ducting over that?

or duck tape?

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Originally posted by Humbug
how about glueing a piece of bike inner tube on the boss and forcing the ducting over that?

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quote:

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Originally posted by RazMan
I've got a problem with the corrugated alluminium duct / hose which attaches to the demist vents (supplied by CBS)
The hoses are 40mm i/d and they fit snugly onto the 40mm o/d inlet boss, but the ally hose just slips off even when secured with a cable tie as the ally just crushes down. Is there a rubber moulding available to make a better push-fit? I can't have a permanent connection as I need to remove the dash occasionally.

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Thanks for all the ideas guys - I have come up with a solution with your help.
I have used a little PU adhesive and glued a turn of 1mm neoprene strip around the spigot. This gives a kind of 'barb' which retains the hose without any need for a cable tie.