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Figuring out the oil sending unit

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Old Apr 28, 2022 | 03:26 PM
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Default Figuring out the oil sending unit

So I'm putting the engine back together, and it's oil time. Trying to figure out the oil sender setup. I was expecting something electrical, but found a plastic hose. Then I found this 45 degree connector. Does the 45 degree connector go on this plastic hose, and then mounted on the engine just above the oil filter? I'm a bit stumped.



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Old Apr 28, 2022 | 03:33 PM
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One end goes onto the engine block at the back below the intake manifold, the other end goes to the oil pressure gauge assuming you have a factory setup?
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Old Apr 28, 2022 | 03:39 PM
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Originally Posted by Haggisbash
One end goes onto the engine block at the back below the intake manifold, the other end goes to the oil pressure gauge assuming you have a factory setup?
Nothing seems to be factory setup on this car, except the VIN, heh.

But, it looks like in this part here, it's stock. Nothing special or aftermarket here.
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Old Apr 28, 2022 | 03:49 PM
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That is the sending unit for a big block. assuming you have a big block that will screw in the block just above the oil filter. then a copper line will run from the sender to a bracket mounted on the head by the # 7 exhaust port. then a nylon line will run from the bracket to the oil pressure gauge. get yourself the AIM manual for your year car and it will show how it is hooked up. also search the forum as there are many posts on this subject.

pat
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Old Apr 28, 2022 | 05:39 PM
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You do not mention the engine, but as mentioned above if it is a big block the threaded end of the 45 will go right above the oil filter in a hole in the block. If it is a small block you need a 1/8" npt fitting at the rear of the block by the bell housing. The plastic hose will fit into the other end of the fitting, but it should have a bevelled fitting, then the nut would thread onto it.
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Old Apr 28, 2022 | 06:18 PM
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The engine in question is a 427.
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Old Apr 28, 2022 | 07:10 PM
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Then that is correct. The plastic line uses a compression fitting on both ends. At the gauge and the so called sending unit.
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Old Apr 29, 2022 | 09:21 AM
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Thank you for the clarification everyone. I got a bit confused seeing a cylinder-shaped, electrical sender unit, but no such unit on here. Then I see other Vettes just with that line hooked up as so. I'm assuming earlier models had this setup, the later ones electrical.
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Old Apr 30, 2022 | 08:33 AM
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They went electrical in 74. Earlier models all used mechanical gauges which is what you have.
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Old May 1, 2022 | 11:04 AM
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I have a 427 in my 1968 C3 and my engine had it's original nylon tube on it. When I rebuilt the engine I changed it in favor of a -3AN SS Braided line as those are less likely to break and allow 200* oil to shoot out from under the center of the dash. Nylon may work but as it gets older it becomes more brittle. I still use nylon tubing on my vacuum gauge but when it comes to HOT oil I prefer to play it safe.

My right leg still bears a scar from an oil line breaking on a road racing motorcycle's engine. It burned me through my leathers and I am not doing that again. The braided lines are available online and are cheap insurance, unless you are going to have your Corvette judged by the NCRS.
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Old May 26, 2022 | 08:07 PM
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ctmccloskey that sounds like a really good idea. I am restoring a 69 that i stopped restoring 15 years ago due to lack of time and money.Back then it sprung a leak behind the dash and it was a mess.I don't know much about AN lines.I have a small block so I think a -3AN 20 inch line would probably be about right. Would anybody know what fittings I would need to add at each end?
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Old May 27, 2022 | 08:10 AM
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https://www.corvetteforum.com/forums...-oil-line.html

read this thread. it has some good info.

Pat
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Old May 27, 2022 | 09:41 PM
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Thanks. I think I am ready to tackle it now.
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