Author Topic: oil feed 1 way valve  (Read 331 times)

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elevensies

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oil feed 1 way valve
« on: 02 February, 2019, 12:36:15 »
Im following on from another thread about oil priming, and before i fill with oil, i have seen one way valves advertised on ebay, to overcome wet sumping.

any thoughts on these please, and would you recommend 2?

thanks

mark

berniej

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Re: oil feed 1 way valve
« Reply #1 on: 02 February, 2019, 13:43:50 »
Hi,

I've resisted the temptation to fit these due to concerns about what might happen so have no direct experience - just worries!
It will be good to hear experiences of others that use them but my concern was that if the valve jams/gums up/fails closed then unless you have an oil pressure gauge there will be no indication until damage is done.

I believe that they rely on a pressure difference across the valve to pull it open and so my other (theoretical) concern is that if there is air in the line between the valve and the pump due to the oil leaking through the pump then the pump might not be able to generate sufficient suction to open the valve and prime itself.

So far my preference has been to either accept I need to drain the sump before starting or to fit a tap in the line and do whatever I can to ensure I never forget to open it!

Cheers,
Bernie

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Old Biker

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Re: oil feed 1 way valve
« Reply #2 on: 02 February, 2019, 16:55:37 »
Hi 11's
My brother has a manual tap in the line to stop wet sumping and he has wired in a connection that stops the bike from being able to run with the tap closed - like me he is old and we can be prone to being forgetful  :)

elevensies

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Re: oil feed 1 way valve
« Reply #3 on: 02 February, 2019, 20:57:54 »
haha thanks guys,

i think i will leave it and fit manual ones on the rubber hose, i guess just inline fuel taps will do the trick
ahhh maybe the hole needs to be bigger, maybe fuel taps are no good??


berniej

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Re: oil feed 1 way valve
« Reply #4 on: 02 February, 2019, 21:25:07 »
Funnily enough this was being discussed on another topic quite recently - try 8mm ball valve taps - plumbers merchants/screwfix/ebay have them. 8mm copper pipe should fit well in your hoses. They just need 90 degree rotation to turn on/off which makes it quite easy to operate if you can only get one finger onto the tap lever.

Cheers,
Bernie
'49 M21/B31 hybrid
'56 M21 combination
Bantam D7
C15 project
B40 Sportsman project

elevensies

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Re: oil feed 1 way valve
« Reply #5 on: 04 February, 2019, 12:05:58 »
been on the search this morning for a tap, and my initial thought was a inline fuel tap, but after sizing up the largest i could find the center home was only about 4 or 5mm,

so iv made up a fitting, but it looks clumsy,


anyone have any pics of theirs please

ANDY HIGHAM

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Re: oil feed 1 way valve
« Reply #6 on: 04 February, 2019, 12:33:24 »
An radical alternative solution to the problem
Most BSA's have an anti wet sump valve fitted on the pressure side of the oil pump, why not clean and reseat the ball?
Anything fitted on the suction side of the pump is a wrecked engine in waiting

ducati2242

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Re: oil feed 1 way valve
« Reply #7 on: 04 February, 2019, 15:43:49 »
I know a guy with a norton who has had an inline tap in his oil feed line for 20 odd years never forgot in 20 years to turn it on . Until last year whilst out for a day run forgot about it after lunch stop . Remarkably he got a further 5 miles before the vibration got overwhelming . 2K later hes back on the road minus said tap . New everything and no wet sumping .
1956 bsa GS DB500
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CAS.VANDERWOUDE

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Re: oil feed 1 way valve
« Reply #8 on: 12 February, 2019, 18:30:45 »
I think all the reasons put here for not installing a one way valve (anti wet-sump valve) apply equally to the stock valve don't they?  The stock valve is a ball bearing held by a small spring.  The chances of loss of prime, gunk fouling the valve etc could happen just as easily with the original filter.

While it is clearly more desirable to re-seat the original ball, this is not possible on all models and sometimes, the ball just will not re-seat no matter what.  If installing a new valve, it would make sense to remove the original ball and spring if possible...

I have a mind to manufacture one fitted with new oil lines and ready to fit.  I see the bare valves online for $50 and more which is about twice the prices they should be.  Any thoughts?

Mike Farmer

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Re: oil feed 1 way valve
« Reply #9 on: 12 February, 2019, 19:47:42 »
 :)

I have a "one way" valve in my A50 oil pipe-----No Problems. And it works well

I'm about to fit one in an A65 currently in the build stage.

Mike 8) 8) 8)