Oil Pressure Sensor Rerouting

SpareParts · Nov 23, 2024

The oil can't flow in the hose. The sender acts as a plug stopping the flow. It just measures pressure.
Remember, liquids don't compress so what ever pressure one end sees the other end sees exactly the same pressure without flow.

OR VietVet · Nov 23, 2024

But you can compress air. That is what is between the sender and the other end, at that point. Oil hits inside the sender, when mounted normally, otherwise the sender would not leak like so many do. The hose is hollow and oil will flow thru it. Unthread the sender at one end and start the engine and post video here.

If there is no oil running out, I stand corrected and apologize.

SpareParts · Nov 23, 2024

True. Air will compress but only so much and we are only talking 60psi max so oil will flow into the hose a little bit if air is present until it reaches 60psi then everything is equal again.
The sender might never see a drop of oil if air is present. The only thing it is measuring is pressure. It does not care if it's water, oil, air, it just sees pressure.

j91z28d1 · Nov 23, 2024

engine oil will transfer heat. it's going to get hot forsure.

that said, he said he used hose from a grease gun. if it's a decent quality gun, the house should be braided steel, basically hydraulic hose.. heat and pressure shouldn't be an issue.

if you're worried about it, they sell kits with braided steel PTFE hose ones for under 100$.

SpareParts · Nov 23, 2024

OR VietVet said:
But you can compress air. That is what is between the sender and the other end, at that point. Oil hits inside the sender, when mounted normally, otherwise the sender would not leak like so many do. The hose is hollow and oil will flow thru it. Unthread the sender at one end and start the engine and post video here.

If there is no oil running out, I stand corrected and apologize.

The oil will flow because the plug (oil sender) has been removed.

SpareParts · Nov 23, 2024

Try this.
Take a mechanical oil pressure gauge with clear plastic hose. $25 at the parts store.
Hook it up and make sure all connections are tight. Start the engine. You will see oil move up the hose a little bit as it compresses the air then stop when pressure equalizes.
There will be air between the gauge and oil in the tube, yet the gauge still reads the oil pressure.

j91z28d1 · Nov 23, 2024

SpareParts said:
Try this.
Take a mechanical oil pressure gauge with clear plastic hose. $25 at the parts store.
Hook it up and make sure all connections are tight. Start the engine. You will see oil move up the hose a little bit as it compresses the air then stop when pressure equalizes.
There will be air between the gauge and oil in the tube, yet the gauge still reads the oil pressure.

I remember those old mechanical gauges. oil still finds a way thou but they did always have an air bubble in them somewhere.

blondie70 · Nov 23, 2024

Spare Parts, you shudda been a science teacher....you explain things very well !

SpareParts · Nov 23, 2024

Thank you, but I'm sure there is someone who can explain it far better than I.

Oil Pressure Sensor Rerouting

SpareParts

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OR VietVet

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j91z28d1

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