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What is Check Valve for?

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What is Check Valve for? Empty What is Check Valve for?

Post  Guest Sun Feb 09, 2014 10:45 am

I've discovered that it was stuck open on mine. What could have possibly happen becouse of this?
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It is called check valve in the manual.
Could it be the reason for rockers and camshaft wearing out?
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Post  Mauser Sun Feb 09, 2014 2:09 pm

MCVL wrote:I've discovered that it was stuck open on mine. What could have possibly happen becouse of this?
Photo
It is called check valve in the manual.
Could it be the reason for rockers and camshaft wearing out?

Hi I am guessing it will only allow oil to flow in 1 direction... like a non return valve.
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Joined : 2010-09-13

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XR650R Year : 2002

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Post  Guest Sun Feb 09, 2014 6:22 pm

best guess would be its related to the fact its a dry sump engine so you don't want all your oil seeping down from the frame tank and flooding the engine?  I would imagine that would only happen over a long period or time and if yours was stuck open then you would get more oil and not oil starvation....

couldn't work out from the manual exactly where it is in the flow of the oil system so this is a guess!

SkidMark
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Post  Guest Wed Feb 26, 2014 7:43 am

Wow!  Shocked 

http://www.xr650r.us/tech/lube.pdf

"There is a second one way valve located in the cases, labeled as a check valve, located behind the oil pump, that appears to allow oil to be blow into the sump if there is excess pressure."

"all the oil eventually drains from the reservoir back into the cases. It does so slowly, as the only exit is through the tight tolerances of the "A" pump."
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