Oil Pressure Light

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Jul 25, 2023 | 05:02 PM

Slick collector

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Cross-Country

Joined: Apr 2023

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Oil Pressure Light

Hey Guys,

Took the ‘66 out on a camp trip this past weekend, I noticed about an hour into the trip my Oil Pressure Light started to blink, I’ve never seen it do that before, it has the 240 with the 4 speed, 215/70/15 tires and 3:73 gears, I don’t do over 60 on the interstate which was about 1 1/2 hours worth of the trip, the rest is back roads, when I noticed it, I pulled off, let it sit and then check oil, it was full with no shavings that I could see, so I took off again and it did it again so I backed off to 55 and no blink, it was close to 100 degrees out, could the oil have gotten to thin for the oil pump to pick up? or is my pump going out? Also I run Motorcraft 10/30 diesel oil and a FL1-A filter, oil level was full the whole trip

Jul 25, 2023 | 05:31 PM

Slick collector

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Cross-Country

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Could it be the sending unit?

Jul 25, 2023 | 06:50 PM

Tom H So. Ca.

Tuned

Joined: Aug 2021

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FWIW: '62 F100 262ci 6. Straight 40wt Valvoline Racing high zinc. No issues with the idiot light. Though, at hot idle the gauge will read about 5 or so pounds. Cold idle about 40. Cold freeway about 60. Hot freeway at about 65mph was about 45. This was in about 80deg air temps.

It could be the oil was too light for the conditions. Odd though that if you stayed below 60mph the light was fine.

Could be a bad oil pump or sender if it was not too light oil grade.

I would consider adding an electric oil pressure gauge. About $20-40 for an OK one on Amazon or flea bay. You can buy a brass "T" style fitting that the original sender and the electric sender will screw into. That way you have both.

Tom

Jul 25, 2023 | 07:42 PM

AZSCAWPION

Fleet Mechanic

Joined: Dec 2016

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Had a problem recently with mine. Seems every now and then would flicker when braking and a few other odd times. Gauge always showed good pressure though. Doesn't burn oil and no leaks (aside from the obligatory drip every now and then to mark its territory) and level always checked fine. Turned out to be the wire at the sensor. Had started to fray at the terminal crimp (how I'll never know since no movement). 50+ year old wiring will test your patience at times.

Jul 25, 2023 | 08:52 PM

Slick collector

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Cross-Country

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I just went out and took a peak at the sender, wire fell off, I’m wondering if it was making contact somewhere from wind and was making the light go goofy, this is the first time in 15 yrs this has happened, I’ve ran it at 60 numerous times, I guess a gauge will be coming soon