Chevy 350 Oil Pressure: All You Need To Know (Explained!)

The chevy 350 is known to be one of the century’s best engines way back in the 20th century. These engines are famous for their durability and their performance. In addition, these engines have earned their name for their usability and reliability. You might want to know a lot about the oil pressure of your chevy 350. 

Oil pressure is based on the resistance oil faces flowing into the engine’s oil passages. Therefore, the indication of oil pressure is from the oil pressure gauge. This gauge must show a steady value in about twenty minutes after starting the engine, and the oil will reach the operating temperature. 

You can use the measurement of psi or bar. If you also want to know the ideal oil pressure, the answer is that it will depend on the car’s model and brand. In general, the ideal oil pressure must be between twenty-five to twenty-six psi. 

To add, oil pressure is needed to reach all the components of the car’s engine. But, if the oil pressure reading is out of this range, then the oil pressure will be considered too low or too high. As mentioned, the oil pressure will depend on the resistance of the oil flowing through the passages. 

This means that the size of the engine, the viscosity of the oil, and the diameter of the bores impact the oil pressure, so now, we will talk about the oil pressure of a chevy 350. After the end of this article, you will know everything about a chevy 350 oil pressure. Let us get started.

Chevy 350 Oil Pressure

What Is Normal Oil Pressure For A Chevy 350?

The average oil pressure of a chevy 350 must be maintained on a 10 PSI of oil pressure per one thousand rpm on the engine. An idle pressure of about ten to fifteen is okay because your rpms are down around six hundred to eight hundred. However, if the PSI is above eighty, then oil pressure is already considered too high for the engine to be protected from damage adequately. 

You must be able to maintain a normal oil pressure for your chevy 350. The high oil pressure is an indication that your car’s oil cannot pass properly into the bores, and the oil cannot reach all the parts of your car’s engine effectively. 

If your engine is not adequately lubricated, your engine can encounter wear because of the vehicle’s friction. There can also be damages to the components, and the worst scenario is that it can lead to an engine failure.

What Is Chevy 350 Oil Pressure At Idle?

If your chevy 350 is idle, you must have a minimum oil pressure of only 5 PSI or thirty-five points five kpa. On the other hand, the minimum oil pressure of two thousand engine rpms is about thirty-five psi or two hundred forty-one kpa. 

These oil pressures are using a mechanical oil pressure gauge. This will measure the low five psi readings.

What Causes Low Oil Pressure In A Chevy 350?

A low oil pressure on your chevy 350 that is idle means that your engine has low oil. If more power is applied to your engine through acceleration, the pressure will heighten. Likewise, a high oil temperature causes a low oil pressure. 

Your car depends so much on your engine oil. Your vehicle’s engine oil will lubricate different components of your engine, and it will help reduce friction. To add, your car’s oil pressure is considered to be one of the most critical parameters in your car’s engine. 

With that, you must make sure that you will maintain the proper engine oil pressure. If your chevy 350 has low oil pressure, it can deliver damages to some parts of your engine components. So the first cause of low oil pressure in your chevy 350 is low engine oil. 

If your chevy 350 is low on engine oil pressure, it would usually mean that you have low engine oil. But, unfortunately, a lot of drivers forget to change their engine oil. This is mainly because many drivers do not know how important it is for you to change your engine oil. 

If drivers know how important it is to change their engine oil, no drivers will change their oil. This is because you leak your supply lines, making your oil insufficient for your engine. Your oil can leak through these tiny holes.

If you notice that you have a low engine oil pressure, you can ask your mechanic to check and look for your car’s engine and signs of worn oil seals and plugs. Another reason also for low oil pressure is that you have incorrect oil viscosity. Therefore, you must always remember to choose your motor oil carefully. 

If your oil has a lower viscosity than what is required, then it will produce less resistance to flow. On the other hand, a lubricant with a higher viscosity than what is recommended by the vehicle’s manufacturer will also generate more viscosity than what is required. Another reason is that you have a damaged oil pump. 

The oil pump of a vehicle is also essential. The oil pump is made to be facilitated by the movement of the engine oil throughout the system. 

If the engine pump of a vehicle fails, the oil pressure will drop. A failed pump failure can be a cause of an incorrect installation to poor oil maintenance.

How Do You Fix Low Oil Pressure?

If your oil pressure is dropping, it can be dangerous for your vehicle’s health. So, if you want to avoid any expensive repairs, you have to check and top up your engine oil regularly. But, first, always never forget to remember, choose an oil with the correct viscosity rating, and your vehicle’s manufacturer must recommend it. 

Next, find out any leaks in the outer part. If you are guessing that you have an external oil leak, that can be addressed by changing the pipes and the hoses. 

If you want o to fix any internal oil leak, you can consult a mechanic or go to an auto shop to have your car repaired and have its maintenance. If your oil pump and pressure gauge are damaged and repaired, then have them replaced.

What Causes High Oil Pressure In A Chevy 350?

Your chevy 350 must have the right and proper engine oil pressure. If your engine oil pressure is too high or it is too low, it can mean that you have some other problems. So if you have high oil pressure, there can still be something wrong with the passages that the oil needs to follow. 

So for your car’s engine to operate correctly, you will need an engine’s lubrication. The oil flows into many parts of your car’s engine if the engine is running, and it will need to be pressurized to move. Each vehicle’s engine has its own specific ideal operating range if we will talk about oil pressure. 

However, it is usually somewhere between twenty-five to sixty-five psi if the oil is already warmed up. A high oil pressure means obstruction or another issue that causes the pressure needed so that the oil can move around to rise.

How Do You Fix High Oil Pressure?

If you have a malfunctioning relief valve, you must remove the valve, clean the valve, and then replace the valve. However, you need to check it afterward. If the oil pressure is still high even though you have already fixed the problem, it means that the relief valve is not the problem. 

The problem must be something else; if the oil pressure has dropped and returned to normal, then you have found out the problem. Your oil sending unit can also be the reason for this. If you think your oil sending unit is the problem, you will have to replace your oil sending unit. 

You also have to do your regular engine oil replacement. Immediately if you also have a blocked oil piping system, you will have to bring your car to a mechanic.

Chevy 350 Oil Pressure Drops When Hot – What To Do?

You can check if your oil pressure switch is functioning correctly. Check also if the oil pump gauge is working. You will lose your oil pressure, and it will go down because the oil gets thinner.


In summary, engine oil pressure is significant for a vehicle. Therefore, you must be able to maintain a standard engine oil pressure. 

Oil pressure that is too high or too low can be dangerous for the car. So the rule of thumb that you need for your chevy 350 is to maintain ten psi of oil pressure per 1000 rpm on the engine.



Image credits – Canva

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My name is Hank, and I've been in the automotive industry for 27 years. I've been working in my own auto repair shop for the last 13 years, and now I want to help you here, on my blog. Let me know if you have any questions. Read more