Lowtechprime
Retro Grouch
What is a good oil pressure for a 1500? The search tool omits 3 letter words like 'oil' so I apologize if this has been covered somewhere.
Good point! I've often searched for 3 letter words and it's annoying that it does this!he search tool omits 3 letter words like 'oil'
For a better way of searching use the xweb google search tool.What is a good oil pressure for a 1500? The search tool omits 3 letter words like 'oil' so I apologize if this has been covered somewhere.
The Google search tool is linked with a sticky at the top of the Workshop forum. There is also a link at the top of the BOX.For a better way of searching use the xweb google search tool.
Programmable Search Engine
cse.google.com
I don't recall, is that spec for a specified temp and RPM?3.4 - 4.9 bar is the official spec.
49 - 71 psi
The 20-50 oil is likely the reason for your higher pressure. Until seals are being blown out I don't believe there is such a thing as too much oil pressure.Hmmm... Mine seems high then? As you can see, I've got about 53 psi at 190°, at around 1,000 RPM's.... Amsoil Z-Rod 20w50....View attachment 62366
Unfortunately, no additional info is given in the spec sheet.I don't recall, is that spec for a specified temp and RPM?
I definitely agree you can have too high oil pressure. I was just being facetious earlier with my comment otherwise. However I do not feel the pressures noted by @Lowtechprime are anywhere near too high. And that was my point.Yes, the gauge and sender should not be considered the benchmark. Consider the electrical system issues with headlights, wipers, blowers, etc... and apply that knowledge to the oil pressure gauge.
The sender is just a simple potentiometer moved by a rubber diaphragm and designed to be inexpensive first and provide moderate accuracy second. The same applies to the gauge.
If you are curious about what your actual oil pressure is, buy a mechanical test gauge, remove the sender and temporarily install the gauge. Start the car and let it warm up. Then note the pressure at idle and as rpm rises until the pressure stabilizes. Its pretty easy to plot the pressure at 1000 rpm increments and see what your pressure profile looks like.
Incidentally, you can have too much pressure. Excessive pressure can cause loss of engine performance (although not likely noticeable to the driver). It can also cause the pump to cavitate and damage itself. There is really no reason for having pressures significantly above the 10 lbs/1000 rpm baseline.
My DP MR2 (Toyota 4AGE) is regularly run to its 9200 rpm shift point with a max oil pressure of 90ish PSI.
I trust electric gauges/senders made by another company, in another country. In my personal experience they are very accurate. It seems to be the ones Fiat used that are not. However we need to consider the type of gauge as well - often the smaller sweep of a factory gauge mounted as part of a instrument cluster is not as effective as a full sweep/full size round gauge, like aftermarket items or part of a "performance" package with extra gauges.Normally, all my cars have all mechanical gauges. But for this one, I wanted the Factory Rally look so.......