oil squirter check valves
- Thread starter TheFirm
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In some Banjo bolts there are internal one way check valves . Now the exact way the check / (let flow one way only ) must be seen .. The units Im familiar with are for a fuel pump check valve , and are still in the bolt section and use a nut , while the other unit is the bolt and head itself used on euro turbos and its checking the opposite direction.
Can you post a picture of your manual , So all here can follow and i know what your looking at ?
VT
Can you post a picture of your manual , So all here can follow and i know what your looking at ?
VT
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- Thread starter
- #4
I will have to scan the page out of my book on another computer, so give me a few days.. Once you can see what i'm talking about it might make more sense!
If a 'check valve' is basically a one way valve, why would they be required at the oil squirters? Surely there will always be oil pressure behind them, so there is no danger of anything flowing the opposite way? Can anyone make sense of them?
If a 'check valve' is basically a one way valve, why would they be required at the oil squirters? Surely there will always be oil pressure behind them, so there is no danger of anything flowing the opposite way? Can anyone make sense of them?
The firm _Fitz answered
Correct on the "are there to stop the oil gallery from emptying out while the engine is not running."
I didn't read your question correctly , and DUH lazy me.
there used for that , after a hot shut down the oil from the top of the engine not syphoning all the oil in the galleys back thru the valves into the crankcase/pan.
On restart the engine would have a dry start because the oil pump would need to fill all those lines / galleys before any pressure build up.
Some oil pressure cooling valves (on high tech euros) similar to your banjo check valves have a second job of restricting the oil to the squirters at idle or when the pressure drops to a set value there design for.
Now ya got me thinking of where there found on the 3B.
Ill know in a few weeks when i dissemble one.
VT
Correct on the "are there to stop the oil gallery from emptying out while the engine is not running."
I didn't read your question correctly , and DUH lazy me.
there used for that , after a hot shut down the oil from the top of the engine not syphoning all the oil in the galleys back thru the valves into the crankcase/pan.
On restart the engine would have a dry start because the oil pump would need to fill all those lines / galleys before any pressure build up.
Some oil pressure cooling valves (on high tech euros) similar to your banjo check valves have a second job of restricting the oil to the squirters at idle or when the pressure drops to a set value there design for.
Now ya got me thinking of where there found on the 3B.
Ill know in a few weeks when i dissemble one.
VT
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Min spec for oil pressure switch for the EDIC fuel injection electrical control is 8.7 psig Or 60 kpa.
So if the engines oil pressure gets below the switches value the engine would be shut down .
Mine also has a function of anti theft / start .
My idle oil pressure hot 98c is 1.5 bar.
Australia not metric ??
Ya can't be that behind because down under is upright i thought.
VT
So if the engines oil pressure gets below the switches value the engine would be shut down .
Mine also has a function of anti theft / start .
My idle oil pressure hot 98c is 1.5 bar.
Australia not metric ??
Ya can't be that behind because down under is upright i thought.
VT
Meself (Metric as in 22cm sounds better than 9"
) I hate the medicals to keep the licence , Rotary , AME.
Its the probing ..
What I quoted was straight out of the factory 12 HT manual.
And manuals are ""Guidelines"" only .
Now this thread has moved to the real problem.
VT
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