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Old 08-05-2019, 04:30 PM   #1
GenXdark
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Oil light flickering

Hey,

I'm pretty new to owning my cb7 and so I figured I'd start here. Please let me know if this is the wrong place.

I did some reading and research, but couldn't find any posts that described the exact same issue I'm having. I found some similar, but they sounded different enough for me to make a post regarding this.

Anyways, this is my issue:

In short, my oil light is sporadically flickering. I have noticed it starts doing it only when the car has been running for a long time and has gotten pretty hot. It doesn't over-heat or anything though. Also, when this light starts to flicker, it begins to idle pretty rough. Then, if I step on the gas ever-so-slightly, the light goes away completely and the idle evens out and it goes back to humming like a bird.

It doesn't leak oil. When I check the dipstick, the oil level is on point. I don't seem to see any smoking coming from the bay or anything. And like I mentioned, it is not overheating at all. And there is NO engine light.

So I guess could someone maybe point me in the right direction on how to begin diagnosing this?

Thank you so much!!!!!
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Old 08-05-2019, 04:44 PM   #2
fleetw00d
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How many miles on the engine? What type and weight of oil do you use? The intent of the light is to indicate low oil pressure, which will be lowest when the engine is hot and at idle. The best scenario would be a bad oil pressure switch, but it could be low oil pressure because of a worn out oil pump or worn bearings. Best thing to do would be to actually measure the oil pressure.
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Old 08-05-2019, 05:05 PM   #3
GenXdark
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Quote:
Originally Posted by fleetw00d View Post
How many miles on the engine? What type and weight of oil do you use? The intent of the light is to indicate low oil pressure, which will be lowest when the engine is hot and at idle. The best scenario would be a bad oil pressure switch, but it could be low oil pressure because of a worn out oil pump or worn bearings. Best thing to do would be to actually measure the oil pressure.
Hey thanks for the reply.

I'm not sure the miles on the engine - when I bought it, the guy said that the engine had been swapped in and he had no more info about it. I use what the cap says - 5w30.

By oil pressure switch, do you mean the oil pressure sensor? The piece that screw into the back/bottom of the block? Right above the oil filter?

I will google up how to measure oil pressure.
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Old 08-05-2019, 09:17 PM   #4
fleetw00d
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Yes. It is just a switch; pressure falls below a certain value and it comes on. It doesn't have a output signal that varies with the oil pressure.

Do you use synthetic oil? It doesn't thin out as much at temperature as normal oil does.
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