Oil Guage Pressure? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**70cst** · 05-25-2021, 04:27 PM

Te pic shows my oil presssyre ... driicng about 60-65 mph.

Is htis about right?

When I slow down to 40 it drops to about 1/2 to a little higher... Thanks

**70cst** · 05-25-2021, 04:28 PM

Not sure why the picture is sideways?

**Steeveedee** · 05-25-2021, 05:25 PM

Same engine in my truck, that looks like mine when I'm running it. It still pegs cold, and now that it has ~120k miles on the rebuild, it's a little below the midline, which if it is a 60# gauge, is 30 psi.

**70cst** · 05-25-2021, 10:44 PM

This stays on the High side vs the Low side …
Posted via Mobile Device

03BlkZ · 05-31-2021, 11:33 AM

My fresh rebuilt 350 gauge pegs out when cold and runs about where your is when warmed up. Idle is about ½

**BigBird05** · 05-31-2021, 05:32 PM

I would buy a good mechanical gauge and compare it to the factory gauge. Your gauge is what about 50+ years old.

**70cst** · 06-01-2021, 09:26 AM

Quote:

Originally Posted by 03BlkZ

My fresh rebuilt 350 gauge pegs out when cold and runs about where your is when warmed up. Idle is about ½

Thanks

**70cst** · 06-01-2021, 09:26 AM

Quote:

Originally Posted by BigBird05

I would buy a good mechanical gauge and compare it to the factory gauge. Your gauge is what about 50+ years old.

Good idea

Davidf · 06-01-2021, 09:37 AM

I don't think accuracy of the gauge is important. The important part is that you have good oil pressure. Normal for the pressure to drop when the oil warms up. My worn out engine would show similar to OP's when cold (20w-50) then drop to middle of gauge when driving and about 1/3 mark idling.

**TBONE1964** · 06-01-2021, 12:07 PM

You can blow compressed air (regulated) into an oil gauge and check them for accuracy. Most likely a 60 lb gauge which in the middle is 30 psi.

What I see looks like 50 lbs of oil pressure. I do agree with checking it against a different gauge. I do trust Autometer products for comparison.

**70cst** · 06-01-2021, 12:52 PM

Quote:

Originally Posted by TBONE1964

You can blow compressed air (regulated) into an oil gauge and check them for accuracy. Most likely a 60 lb gauge which in the middle is 30 psi.

What I see looks like 50 lbs of oil pressure. I do agree with checking it against a different gauge. I do trust Autometer products for comparison.

Thanks

I assume all is well but just wanted to verify.

05-25-2021, 04:27 PM	#1
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,365	Oil Guage Pressure? Te pic shows my oil presssyre ... driicng about 60-65 mph. Is htis about right? When I slow down to 40 it drops to about 1/2 to a little higher... Thanks Attached Images __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

05-25-2021, 04:28 PM	#2
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,365	Re: Oil Guage Pressure? Not sure why the picture is sideways? __________________ A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder!

05-25-2021, 05:25 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,274	Re: Oil Guage Pressure? Same engine in my truck, that looks like mine when I'm running it. It still pegs cold, and now that it has ~120k miles on the rebuild, it's a little below the midline, which if it is a 60# gauge, is 30 psi. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

05-25-2021, 10:44 PM	#4
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,365	Re: Oil Guage Pressure? This stays on the High side vs the Low side … Posted via Mobile Device

05-31-2021, 11:33 AM	#5
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	Re: Oil Guage Pressure? My fresh rebuilt 350 gauge pegs out when cold and runs about where your is when warmed up. Idle is about ½

05-31-2021, 05:32 PM	#6
BigBird05 Senior Member Join Date: Aug 2019 Location: Cheraw Posts: 1,305	Re: Oil Guage Pressure? I would buy a good mechanical gauge and compare it to the factory gauge. Your gauge is what about 50+ years old.

06-01-2021, 09:37 AM	#9
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: Oil Guage Pressure? I don't think accuracy of the gauge is important. The important part is that you have good oil pressure. Normal for the pressure to drop when the oil warms up. My worn out engine would show similar to OP's when cold (20w-50) then drop to middle of gauge when driving and about 1/3 mark idling.

06-01-2021, 12:07 PM	#10
TBONE1964 Cluster King Join Date: Nov 2012 Location: Junction City, OR Posts: 5,263	Re: Oil Guage Pressure? You can blow compressed air (regulated) into an oil gauge and check them for accuracy. Most likely a 60 lb gauge which in the middle is 30 psi. What I see looks like 50 lbs of oil pressure. I do agree with checking it against a different gauge. I do trust Autometer products for comparison. __________________ Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C



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