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oil pressure port

oil pressure port

Postby thedogkeeper [OP] » Feb 27 2021, 4:05pm

Hello,
I was told where the oil pressure sensor on my 5.3 is. I still cannot see it but I haven't tried a mirror yet.
Is there anywhere on the engine I can install a mechanical oil pressure gauge?
I've installed them on older Chevy motors but this one is completely new to me.
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Re: oil pressure port

Postby LincolnLooser » Feb 27 2021, 6:59pm

Not sure what model you have but maybe this will help. Go to youtube and watch this video. https://www.youtube.com/watch?v=Q7b2YSmhUpA

If yours is an AFM motor, it is difficult to see the sending unit, but it is on the driver side, rear of the intake manifold. If your dash gauge is reading low, check the oil level. If it is good, your engine may have the small screen under the sending unit (like in the mentioned video). Pull it out and clean it with BrakeKleen and you should be good.

You might be able to find an adapter that would go between the engine and the oil filter that you could attach an external gauge. Would not know of another "port". Found this on Amazon.

https://www.amazon.com/labwork-EN-47971 ... NrPXRydWU=
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Re: oil pressure port

Postby LincolnLooser » Feb 27 2021, 10:28pm

Here is how the oil flows in the 5.3 AFM engine.

706 - Oil Pressure Sensor
451 - Vavle Lifter Oil Manifold
452 - Valve Lifter Oil Filter
455 - AFM Oil Pressure Relief Valve


Imagepublic image upload
2007 GMC Sierra 1500 SLE - 4x4, 5.3l AFM - Flex Fuel
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Re: oil pressure port

Postby thedogkeeper [OP] » Feb 27 2021, 10:53pm

Thanks! I don't know what engine I have and am not sure how to tell.
The oil filter adapter is a great idea. I need to find the one that fits my engine and I would add a mechanical gauge. Doesn't look like there is another place to put a fitting according to the diagram.
My oil pressure gauge is pegged with the engine off or on. Could be something other than the sensor but I figured I would change it first.
It is impossible to see.
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Re: oil pressure port

Postby shakenfake » Feb 28 2021, 1:36pm

It is behind your intake manifold on the drivers side right on the tip top of the back of the black
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Re: oil pressure port

Postby Walkers » Feb 28 2021, 3:53pm

Most of those oil passages have a through hole that iis plugged off. Look for plugs is the locations of intersections. Pull the plug with the engine off, if it is oily then you have found a port for a gauge.

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Re: oil pressure port

Postby thedogkeeper [OP] » Feb 28 2021, 5:47pm

You're right. There are quite a few 1/8" plugs on the side of the engine. I was guessing most of them were water.
I think I'll put a remote 2 filter set up on it and solve it that way. I'll have 2 filters and an extra quart of oil. I can run a cooler later if I want.
Thanks for the input.
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Re: oil pressure port

Postby jake2250 » Feb 28 2021, 5:53pm

thedogkeeper wrote:Thanks! I don't know what engine I have and am not sure how to tell.
The oil filter adapter is a great idea. I need to find the one that fits my engine and I would add a mechanical gauge. Doesn't look like there is another place to put a fitting according to the diagram.
My oil pressure gauge is pegged with the engine off or on. Could be something other than the sensor but I figured I would change it first.
It is impossible to see.

There should be a sticker on your air cleaner box and the underside of your hood. Has your engine on it.
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Re: oil pressure port

Postby thedogkeeper [OP] » Feb 28 2021, 6:36pm

Thanks. Someone changed it to a Air Raid air cleaner--the sticker is no longer there.
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Re: oil pressure port

Postby Walkers » Feb 28 2021, 7:19pm

Be aware, a 2 filter system will do you no favors in the oil pressure department. You are adding a bunch of hose, which adds friction. Im not sure if the oil goes through either filter at the same time, or one filter then the next, which would add more friction.
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