Oil Pressure Sensor Rerouting
- Thread starter blondie70
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bdbull
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I don't know how you did this, but it's amazing. I've replaced that thing on my '10 Avalanche 3 times. I come out beat up and bruised every time from having to lay on top of the engine to get to that damn thing.
Tonyrodz
Resident Resident
Does it work correctly? If it does--NICE.
Charlie207
Full Access Member
You could install an analog gauge in-line, to verify pressure once that sender unit fritzes-out.
Can you post a parts list for us?
Can you post a parts list for us?
strutaeng
Full Access Member
Looks good. Is the hose rated for the high temperature of the oil?
Once when I was trying to diagnose low oil pressure on my 4.3 Silverado, I hooked up a pressure gauge, which concluded that I did have oil pressure. I don't remember what happened but I shut the hood and forgot about (probably got distracted?) I drove with the gauge in the engine bay for a good 2 weeks, in the summer heat. I'm glad the hose didn't burst because of the hot oil. That would have been really bad.
Once when I was trying to diagnose low oil pressure on my 4.3 Silverado, I hooked up a pressure gauge, which concluded that I did have oil pressure. I don't remember what happened but I shut the hood and forgot about (probably got distracted?) I drove with the gauge in the engine bay for a good 2 weeks, in the summer heat. I'm glad the hose didn't burst because of the hot oil. That would have been really bad.
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Well....the oil ain't hot. Not flowing. Just the ambient heat under the hood. Nary a problem and my oil pressure reads good. I will have to look up some receipts (if I can find them) for the parts for this. Note that the engine was out when we put this on. Pretty easy to get to then..ha ha.
What do you mean, "The oil ain't hot". The hot oil has to hit the sender to give a pressure reading, inside the hose to the sender, after the engine gets hot.
Seems to me oil is not flowing through the hose but more or less sitting in the same spot as the day it was installed near the sender. At the block i can see the connection being 200ish degrees from heat transfer.
Are you saying with a hot engine, the hose does not get warm/hot? If you remove that hose at the back of engine and start that engine, it is gonna flow oil.
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.
Remember, liquids don't compress so what ever pressure one end sees the other end sees exactly the same pressure without flow.
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.
If there is no oil running out, I stand corrected and apologize.
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.
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.
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$.
that said, he said he used hose from a grease gun. if it's a decent quality gun, the house should be braided steel, basically hydraulic hose.. heat and pressure shouldn't be an issue.
if you're worried about it, they sell kits with braided steel PTFE hose ones for under 100$.
The oil will flow because the plug (oil sender) has been removed.
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.
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.
Thank you, but I'm sure there is someone who can explain it far better than I.
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