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1977 Oil Presure gauge and Altimeter Gauge Readings

akbigbear

Member
Joined
Jul 8, 2007
Messages
7
Location
Connecticut
Corvette
1977 L-82, Shiny Silver
What is the normal operating range for the oil pressure gauge and for the volt gauge?
 
Joined
Jan 1, 2002
Messages
7,246
Location
Washington, Michigan
Corvette
'67 Marina Blue Convertible
With the engine warmed-up, you should see 20-30 psi at idle, and 40-50 psi on the highway. Never saw a (factory) altimeter in a Corvette; set it at 29.92" Hg. and buckle up! :D

:beer
 

Victory Red C6

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Joined
May 10, 2007
Messages
205
Location
Gibbon, MN
Corvette
2007 Victory Red Coupe
Altimeter in a car???

What is the normal operating range for the oil pressure gauge and for the altimeter gauge?

I have never heard of an altimeter being installed on any car before. I know that the Corvette has been and currently is cutting edge for the latest in automotive technology, but an altimeter. Not sure why one would really need an altimeter in a car, an airplane definitely. I would think that the altimeter should be reading what ever the altitude or elevation that the car is above/below see level.
 

akbigbear

Member
Joined
Jul 8, 2007
Messages
7
Location
Connecticut
Corvette
1977 L-82, Shiny Silver
I have never heard of an altimeter being installed on any car before. I know that the Corvette has been and currently is cutting edge for the latest in automotive technology, but an altimeter. Not sure why one would really need an altimeter in a car, an airplane definitely. I would think that the altimeter should be reading what ever the altitude or elevation that the car is above/below see level.


I am allowed to be embarrased right?

I own a plane too but I meant Volt Meter!!! Let me crawl into my hole but does anyone know what the Volt gauge should read under normal conditions?
 

Victory Red C6

Well-known member
Joined
May 10, 2007
Messages
205
Location
Gibbon, MN
Corvette
2007 Victory Red Coupe
I am allowed to be embarrased right?

I own a plane too but I meant Volt Meter!!! Let me crawl into my hole but does anyone know what the Volt gauge should read under normal conditions?

Yes, I guess you can be embarrassed. I know that Corvettes can fly, but I thought that was only horzontally (haul a$$). Any vertical flying should be left to machines equipped to do such as your plane.

The digital readout on the driver information center on my C6 varies between 14.0 to 14.6 volts. I guess it depends on the number of electrical systems running (i.e. headlights, heated seats, rear window defogger, etc.) putting a load on the charing system and how much the battery is charged.

To get a digital read out of your charging system purchase a digital read out multimeter, with the engine running simply check the voltage at the battery.
 

wishuwerehere82

Well-known member
Joined
Sep 6, 2003
Messages
2,314
Location
Rochester, NY
Corvette
Red '82 Coupe,Sebring Silver '98 Coupe
The Volt gauge is normally 1.7 -2.6 Volts above 12 Volt battery, which means it should read 13.7 - 14.6 Volts depending on the load on it.
After cranking, it will charge higher to replace the charge lost from starting.
With lights, defrosters, brakes on, it will also charge higher.
But with nothing on at cruising speed after a few miles it will be around 13.7V.
 

76okievette

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Joined
Jan 3, 2004
Messages
697
Location
oklahoma
Corvette
Early 1976 L-48, 2008 Victory Red
You stated that "you should see 20-30 psi at idle, and 40-50 psi on the highway" well after putting in my new oil pump about 6 months ago I now have about 80 psi of oil at speed and it drops down to about 35 to 45 at idle when the car is warm. What if any kind of problems will this cause me? MY gage is pegged to the right most of the time but you do see movement down as the RPM's drop.
 

Evolution1980

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Feb 25, 2002
Messages
4,302
Location
Cleveland, Ohio
Corvette
ZZ4, 700R4, Steeroids rack & pinion, VB&P Brakes
You stated that "you should see 20-30 psi at idle, and 40-50 psi on the highway" well after putting in my new oil pump about 6 months ago I now have about 80 psi of oil at speed and it drops down to about 35 to 45 at idle when the car is warm. What if any kind of problems will this cause me? MY gage is pegged to the right most of the time but you do see movement down as the RPM's drop.
I'm interested in seeing the responses to this....
:confused
 

76okievette

Well-known member
Joined
Jan 3, 2004
Messages
697
Location
oklahoma
Corvette
Early 1976 L-48, 2008 Victory Red
Well I have to say I put the pump in but when I ordered it from Melling I thought I was ordering the standard pump and not the high pressure one, I guess I got the high pressure one, do you think this could be the cause of some of my oil leaks? Would the higher pressure cause leaks?
 

Vette79

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Joined
Jan 23, 2007
Messages
1,392
Location
Millersville, MD
Corvette
1979 L-48 Black Coupe
Well I have to say I put the pump in but when I ordered it from Melling I thought I was ordering the standard pump and not the high pressure one, I guess I got the high pressure one, do you think this could be the cause of some of my oil leaks? Would the higher pressure cause leaks?
I agree. I ordered the Melling Standard Pressure Standard Volume Oil Pump and receive the same results. No problems encountered so far after 6 weeks.
 

akbigbear

Member
Joined
Jul 8, 2007
Messages
7
Location
Connecticut
Corvette
1977 L-82, Shiny Silver
This is why I asked the question.

You stated that "you should see 20-30 psi at idle, and 40-50 psi on the highway" well after putting in my new oil pump about 6 months ago I now have about 80 psi of oil at speed and it drops down to about 35 to 45 at idle when the car is warm. What if any kind of problems will this cause me? MY gage is pegged to the right most of the time but you do see movement down as the RPM's drop.



I asked this question for the exact same reason!!

I am getting the exact same psi at idle and the same psi on the highway under normal driving conditions. The difference is that I have a new delco oil pump in my car?
 

yellow77

Well-known member
Joined
Jun 17, 2004
Messages
184
Location
Tulsa, OK
Corvette
1977, Bright Yellow
Should not hurt anything at all. It will not cause leaks, anywhere there is a gasket or a seal, the oil is usually being thrown around the valve cover or running back into the pan by the timing chain, just for examples, the only exception being is the oil filter seal, but this is usually tight enough to not cause any issues.
Modern engines run very high pressures, by intent. A high volume pump will leave a little more oil around the top end of the engine while operating, but the sump is sufficient and the return passages are large enough to keep plenty of oil circulating.
As far as the voltmeter, it should read to the right of center (around 13-14 volts) with no accessories on and the engine running. With the headlights running, the wipers on, and the heater fan running, the voltage may drop down to a little under 13 volts, again with the engine running. This will keep your battery charged.
Try not to worry so much and enjoy your Corvette.

Cheers

Richard
 

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