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Question About Oil Pressure Gauge On A 91
#792542 June 28th 2022 12:36 pm
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soundhd Offline OP
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Can anyone tell me where on the stock oil pressure gauge located on the stock gauge cluster on a 91 with a 5.0 is the needle supposed to be when idlling and when moving. Right now it sits just above the “red” maker to the low end when idling and gets up to past the quarter marker when going down the road. If not correct probably will try replacing the oil pressure sender and see if that corrects it. Just got the van out on the road yesterday for the first time since trailering it home last October and drove it for about hours total (been working on it all winter and spring). Everything seems ok, seemed to run pretty well.
Thanks

Last edited by soundhd; June 28th 2022 12:38 pm.

Recently purchased (10-2021) a 1991 Chevy G-20 “Shorty”. Past vans are a 1976 Chevy G-10 (purchased new in 1976 & sold in 1995). A 1978 Chevy G-20 Shorty purchased in 2010 and sold in 2015.
Re: Question About Oil Pressure Gauge On A 91
soundhd #792543 June 28th 2022 3:29 pm
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Your about a 1/2 qt low ... maybe a clogged filter ...


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'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Question About Oil Pressure Gauge On A 91
soundhd #792598 June 30th 2022 9:39 am
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soundhd Offline OP
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Oil is full, changed it early this winter.and the filter.


Recently purchased (10-2021) a 1991 Chevy G-20 “Shorty”. Past vans are a 1976 Chevy G-10 (purchased new in 1976 & sold in 1995). A 1978 Chevy G-20 Shorty purchased in 2010 and sold in 2015.
Re: Question About Oil Pressure Gauge On A 91
soundhd #792757 July 03rd 2022 11:38 pm
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My 91 G20 5.7L oil pressure gauge behaves similar to yours. Did changing the oil pressure sender make any difference?


1991 Chevy G20 5.7L chevy
Re: Question About Oil Pressure Gauge On A 91
Underdog #792795 July 05th 2022 3:25 am
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soundhd Offline OP
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Have not gottEn to that yet…..have had other house/property “stuph” pop up recently. Going to order the oli pressure gauge sender today as a matter of fact….thanks for the reminder…

Originally Posted by Underdog
My 91 G20 5.7L oil pressure gauge behaves similar to yours. Did changing the oil pressure sender make any difference?
Originally Posted by Underdog
My 91 G20 5.7L oil pressure gauge behaves similar to yours. Did changing the oil pressure sender make any difference?


Recently purchased (10-2021) a 1991 Chevy G-20 “Shorty”. Past vans are a 1976 Chevy G-10 (purchased new in 1976 & sold in 1995). A 1978 Chevy G-20 Shorty purchased in 2010 and sold in 2015.
Re: Question About Oil Pressure Gauge On A 91
soundhd #792801 July 05th 2022 5:37 pm
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Cold start it should peg the needle (60+ PSI) warm- almost 30+ Middle of gauge, hot- lucky to have it above 20. Don't judge your oil pressure at idle hot, kick up the throttle to a fast idle around 1000 rpm then look. The senders are mostly crap, they leak at the fitting and at the electrical connection. You can clean the connection and make sure it's tight. A little pinch with pliers will help and I mean little don't crush. when driving at a steady pace you should see a constant reading. Remember the van is old and GM sold cars in the mid 80's that were only ment to go 100k don't expect much, but they will last longer.

Re: Question About Oil Pressure Gauge On A 91
soundhd #793048 July 15th 2022 5:11 pm
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Best thing you could do is ditch the "dummy gauge" (without numbers) and install an aftermarket gauge with numbers, either digital or analog. Way more accurate than the sweep style gauges.


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