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Discussion Topic:
oil sending unit
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JayChicago |
05-20-2019 @ 10:06 PM
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Member
Posts: 496
Joined: Jan 2016
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My '40 has very low oil pressure. At least that's what is indicated on the gauge; I have not gone thru the work to hook up a mechanical pressure gauge to check this. I assume to do that I will need to remove the sender, which looks tricky to me, no room to get a wrench on it. I just came across one of TomO's posts from several years ago talking about what to expect if a later 80# sending unit was used on a car with an original 50# gauge. Tom indicated the gauge would be showing readings about 1/2 scale. Makes me think perhaps some time in the past the sending unit on my car was replaced with an 80# sender. So my questions are: 1. Can I check the sending unit on the car? Can I put an ohm meter on it to check it? Volt meter? 2. What is involved to get the sender off the engine. Will I be able to get a claw-foot wrench down in there? I saw some reference to home-made sender removal tools, but I don't have the skill to make one. Is there an oil sender tool available on the market? Or should I remove the floor board to get access to the sender that way?
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51woodie |
05-21-2019 @ 4:14 AM
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Senior
Posts: 526
Joined: Jan 2017
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Jay I'm not sure how a '40 compares to a '46, but I just went through the process of working on my oil gauge sender. The PO had removed the sender and installed a mechanical gauge. I wanted the dash gauge working and still have the mechanical gauge as backup. I couldn't access the back of the oil port on the engine with the floorboard out, so had to do the job from the engine compartment. Still have bruises on my chest from laying over the fender. I have a set of 3/8" drive crowfoot wrenches, that along with an extension allowed me to work from the top to do the installation. I got some brass fittings from a plumbing supply, which I combined to have both the mechanical and electric gauges functioning. A short nipple and a tee fitting gave me the two ports I needed to do this. Orienting the tee and the mechanical line to clear the throttle linkage arm took some thought, and I had to realign (bend) the oil line that goes to the filter so it would clear the electric sender.
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TomO |
05-21-2019 @ 6:21 AM
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Senior
Posts: 7278
Joined: Oct 2009
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Jay, if you do not have an oil filter, you can remove the plug for its port just below the sender and connect the mechanical pressure gauge there. You only need to turn the sending unit one turn with a wrench and then you should be able to remove it by hand. It is a pipe thread, so it will loosen quickly.
Tom
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