Brake hose widget thing

Post by **Jason B** » 14 Nov 2007 04:42 pm

Hi guys,
Pretty sure I had the manifold-servo vacuum hose collapse on the last rally (thanks for the tip chris) I'm about to bung a silicon vacuum hose (was cheap and fast delivery) of the same dimensions on but realised that there is a widget thing in the manifold end of the hose just above where the end of the manifold would be, looks just like a lump of rubber. So:

a) what is this crazy widget?
b) do I need it?

Cheers

Jason

Post by **setsunakaede** » 14 Nov 2007 04:48 pm

Iirc, it is a one-way valve, to keep the brake vacuum even when there is only low vac on the manifold.
So, keep it? Well-- i'd say YES.

Post by **Jason B** » 14 Nov 2007 05:00 pm

lol, its not the one way valve surely, as thats on the servo end of the hose. I'm holding it here in my hand and its definitely a one way valve. I'm talking about a little black thing in the hose itself.

I may be wrong of course?

Cheers

edit- just tried a foot pump on the hose at both ends and it isn't a one way valve (or its totally knackered!)

Post by **Chris_C** » 14 Nov 2007 06:44 pm

Restricting smoothy thing like the carb/crank breather one? I've no idea though!

Post by **Jason B** » 14 Nov 2007 06:50 pm

I think you are close its weird because it does slightly restrict flow in one direction but definitely not like a non return valve i.e. it is always open just more restricted one way? I'm clueless too, as the main non-return valve is working great and I wouldn't have thought two would be needed especially as the valve is a essentially a "backup device"

Post by **Chris_C** » 14 Nov 2007 07:55 pm

It can only be more restrictive one way if it's tapered inside mate...

Post by **Jason B** » 14 Nov 2007 08:43 pm

yeah, but it doesn't seem like that its a weird widget and I can't get it out without cutting the hose. I'm hoping my hose arrives tomorrow and i'm tempted to give it a go without the widget, other cars only seem to have one non return valve so i'm sure it'll be fine.

Post by **Chris_C** » 14 Nov 2007 09:56 pm

Lol... lets play guessing games with the brakes on a car you're going to rally tomorrow... Am I the only one who hopes I a damn sight ahead of you?

Dude... surely the proper pipe would have been just as cheap?

Post by **Jason B** » 15 Nov 2007 01:17 am

unlikely but I haven't had time to go anywhere anyway, had full days all wek and I'm still working now so I can come out and play tomorrow! (and this pipe will be fine (it is vacuum hosing so won't collapse, and I have a beautifully working non return valve) I'm gonna see what its like and take the other hose with me, as it really wasn't that bad last time.

Post by **pettaw** » 15 Nov 2007 07:29 pm

You've got a 360 right? If so then the vacuum hose is just a simple hose and is cheap as chips from the dealer. I paid about 10 quid I think for a good length.

I think the non-return valve is on the servo end and then its just an ordinary hose from then on, but that's for the injection cars. However I seem to remember that the carb cars work in the same way.

The 340s have a different system where the non-return valve is in the hose and therefore the assembley is more expensive, about 30 quid.

Post by **Chris_C** » 16 Nov 2007 01:37 am

Ahh... thats intriguing... from memory PTF has the same set up as Fake and Kar... we can compare Jason's old one to one of mine.

Post by **Jason B** » 16 Nov 2007 02:13 am

I think I have a 340 hose on a 360 as it definitely has something in the tube, either way it is sorted now and worked great on tonights rally.