Oil pressure help

[84prspctr]

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New gauge, way more pressure.

 

[Ricko1966]

So hmmm post 2 was the right answer.

 

[84prspctr]

So hmmm post 2 was the right answer.

Yep. I will see what the pressure does after a 45 minute highway drive in 105 degree heat tomorrow

 

[84prspctr]

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Trucks doing good. Sitting in stopped traffic in 100 degree weather for 30 min pressure never dropped below that

 

[Rickf]

What's the deal with that voltage gauge? It should be around 14 when running.

 

[84prspctr]

What's the deal with that voltage gauge? It should be around 14 when running.

Gauge is messed up. Sometimes works sometimes doesn’t. Checked with multimeter and it’s got 14.3 volts. Gas gauge reads backwards and bounces also because it is the wrong ohm rating. I might as well replace all those gauges with the same type as the new oil pressure gauge

 

[Rusty Nail]

I dunno.
What does coolant temp have to do with oil pressure? Nothing?

My vote is the line to the gage has some jazz in it. The second thought is to disconnect the gage fitting and blow it out.
Lookin at you oil pressure gage!
What is your problem anyways?

 

[Rusty Nail]

lolwut?
it could simply be sludge or gunk in that 1/16 diameter plastic tube or something so simple as a bad connection. a couple of wire strands in a butt connector would give a bad number because of low line voltage at the gage.
high resistance?
lookin at you oil pressure gage!

not like the budget parts store gages are world-reknown for being the pinnacle of accurate measurement.

reknown | Common Errors in English Usage and More | Washington State University

brians.wsu.edu

there is obviously some oil pressure or he would be asking about swapping engines by now. I forward the motion the gage is the suck. it cant run without oil pressure...

 

[Octane]

I drove a 283 sbc for two years with 12-14 psi oil pressure. Never seemed to hurt it. But it did get 40 miles to a quart of oil.

 

[rusted nuts]

I drove a 283 sbc for two years with 12-14 psi oil pressure. Never seemed to hurt it. But it did get 40 miles to a quart of oil.

Yeah they don't need a lot Old chevy sixs just had dippers on the rods

 

[Octane]

Yeah they don't need a lot Old chevy sixs just had dippers on the rods

My 283 had rings seized on two pistons and bad valve seals. I had dual exhaust and on the bank that the rings were bad had hardly any exhaust, compared to the other bank. That engine was swapped from a 64 Impala with a little less than 100k on it. Was just worn out.Car looked nice. I put it in a 67 c10 for 2 years. Check the gas ... fill it up with oil!

 

[peats]

I personally would run a 160 stat and rotella 15-40. (I can hear the groaning already). Yes oil will thin out the hotter it gets. That is the combo I use although my engine is not worn. The rule of thumb I heard was 10lb/1,000rpm. I think your engine has many miles left in it.

 

[84prspctr]

I am going to put a 160 in or a 180 in when it starts getting cooler out. It is running really well right now with the 1” retractor plate stays right around 180 degrees to 190 never above no matter how hot the outdoor temp. Hoses pressurize just fine. As for the 20w50, a lot of the people I have talked to around here say to run 20w50 in this engine with the heat in the summer. I will switch to a 15w40 or something in the winter.

 

[ChuckN]

How do you know the specific temp readings on the highway, since the stock gauge in a ‘73 did not have any numbers on it? Is this the original gauge cluster, and/or have you added something aftermarket?
It’s also very common to have the wrong temperature sending unit (GM changed them several times over the years) in an older engine, and that would screw up rhe temp reading.

The original oil pressure gauge in the cluster should also be mechanical. Is that what you are using?

If anyone has part numbers for the proper temp sending units for the different years, that could be helpful. I picked up one for mine but definitely reads hotter than it’s running.

 

[Rusty Nail]

We went through this a while back I think. Seems like a different part when the gages changed from amps to volts.
The answer is in this website somewhere. Try interior.