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#1
05-21-2022, 08:09 PM
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Oil light in dash Question
1964 GP 389 4 bbl ….dash oil light comes on….and dip stick says Full. Can these sending units act up ? Thanks
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#2
05-21-2022, 08:29 PM
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Yes it could be bad sender or no oil pressure. Check it with a known good gauge
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468/TKO600 Ford thru bolt equipped 64 Tempest Custom. Custom Nocturne Blue with black interior. |
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#3
05-21-2022, 08:53 PM
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__________________
'69 GTO Convertible - Acquired October 2020. An all original project car. Restomod is underway PROJECT THREAD '83 Chevy Choo Choo SS El Camino - LT1 350/4L60e, Owned for 30 Years, completed 2nd restomod in 2018 PHOTO 2019 BMW 440ix - Twin turbo I6, 8spd auto. PHOTO '55 Chevy Bel Air Sport Coupe - Ram Jet 350 / T56 Magnum 6spd, Restomod Completed Sept. 2012, Sold Sept. 2021 PHOTO |
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#4
05-22-2022, 06:29 AM
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When does the oil light come on, at hot idle and then go off at around 2000 rpm?
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I do stuff for reasons. |
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#5
05-22-2022, 07:31 AM
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The oil light measures oil pressure not the oil level. In short the sending unit can go bad and the light can come on especially during hot idle. It could also be low oil pressure due to a worn pump or worn bearings. The only sure way to know is to temporarily plumb in a gauge and check the pressure.
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Bill Strobel Owner Independent Towing 1965 GTO Nightwatch Blue/Aqua 2005 GTO Quick Silver/Red Fayetteville, NC Do It Right or Don't Do It All |
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#6
05-22-2022, 08:16 AM
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X2 with post 5!
Also if with the motor cold and you crank the motor and the light goes off once the motor starts up then there’s a very high percentage that the sender is still good when the motor is fully up to temp, as in 5 minutes of driving around in temps above 60.
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I do stuff for reasons. |
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#7
05-22-2022, 02:27 PM
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So I started up the GP….and the light came on after 25 seconds of idle time. Then i let it warmed up at idle ,in park, for 5 minutes. The light stayed on …BUT WHEN I JABBED THE GAS PEDAL….the light went out for a second ,then came back on. I change the oil and filter every spring…but havent changed it yet. Had this car for 5 years and this is the first time this light has come on. Maybe an oil and filter change will do the trick. Probcably 1000 miles driven last year
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#8
05-22-2022, 02:53 PM
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If you hold the throttle at 1000-1500 does the light go out ?
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#9
05-22-2022, 03:31 PM
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It sounds like to like the oil pump check ball is being kept unseated by some crap from the bottom of the pan, non the less I would not run the motor any longer until I had a cheap mechanical gauge hooked up to the where the sender currently is to confirm what may or may not be going on with the pressure.
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I do stuff for reasons. |
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#10
05-22-2022, 03:37 PM
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Ok …thanks for the info
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#11
05-23-2022, 03:59 AM
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The sender is set to turn the light on if pressure drops below about 4.5 pounds. If the light is on and the sender is good, the actual pressure is below that amount but you just won't know how low it is until you get a gauge plumbed in.
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Mick Batson 1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress. |
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#12
05-23-2022, 08:47 AM
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Could oil over fill …cause this problem. .?
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#13
05-23-2022, 11:40 AM
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100% no on that!
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I do stuff for reasons. |
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#14
05-23-2022, 01:40 PM
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Thank You....got a guage coming...
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#15
05-30-2022, 05:44 PM
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We have oil pressure at a hot idle ..YIPPIE !!!!! So the sending unit was bad. I all my years …this is the first sending unit that gone bad…lol And many thanks for those of you that gave me the info on that guage . Thank You |
| The Following User Says Thank You to MUSLCAH For This Useful Post: | ||
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#16
05-30-2022, 05:59 PM
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Yup , your golden!
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I do stuff for reasons. |
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#17
05-30-2022, 09:48 PM
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Great!
 Money well spent for that tool.
__________________
'69 GTO Convertible - Acquired October 2020. An all original project car. Restomod is underway PROJECT THREAD '83 Chevy Choo Choo SS El Camino - LT1 350/4L60e, Owned for 30 Years, completed 2nd restomod in 2018 PHOTO 2019 BMW 440ix - Twin turbo I6, 8spd auto. PHOTO '55 Chevy Bel Air Sport Coupe - Ram Jet 350 / T56 Magnum 6spd, Restomod Completed Sept. 2012, Sold Sept. 2021 PHOTO |
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#18
05-31-2022, 08:52 AM
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Quote:
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