6.7 Cummins Oil Pressure at Idle

The normal oil pressure at idle for a 6.7 Cummins engine should be between 10 to 15 psi (pounds per square inch). If the oil pressure is lower than 10 psi, it could indicate an issue with the engine, such as worn bearings or clogged passages in the crankcase, and should be checked out immediately. If the oil pressure goes above 15 psi while idling, it may mean that there is too much oil in the system or that there is excessive wear on some of the components within the engine’s lubrication system.

In either case, further investigation by a qualified mechanic would be recommended.

Having a healthy oil pressure at idle is essential for the durability of your 6.7 Cummins engine. Without adequate oil pressure, the constant friction between all moving parts will create intense heat and unwanted wear on the engine components, resulting in poor performance and potential damage over time. The ideal amount of oil pressure at idle should be around 20-30 psi (pounds per square inch).

Any lower than this could indicate that there is an issue with either the pump or filter, so it’s important to have any problems investigated by a qualified mechanic as soon as possible.

Cummins Low Oil pressure fix!

How Much Oil Pressure Should a Cummins Have?

When it comes to oil pressure, Cummins diesel engines are no different than any other engine. The ideal range for oil pressure in a Cummins engine is 7-9 PSI at idle, and between 40-70 PSI when the motor is running at full speed. If your Cummins’ oil pressure falls below 7 PSI or exceeds 70 PSI while running, you should check the condition of your lubrication system immediately as this could be an indication of serious problems that should not be ignored.

To ensure proper operation of the Cummins diesel engine’s lubrication system, regularly inspect all components such as filters and hoses for possible blockages and leaks which can lead to loss of prime or low levels of oil pressure. Additionally, depending on how many miles have been driven on your truck since its last service interval, you may need to change out any worn parts such as bearings or seals in order to restore optimal performance from your vehicle’s cumulative power plant.

Is 50 Psi of Oil Pressure at Idle Good?

Yes, 50 PSI of oil pressure at idle is considered good. It’s important to note that the number can vary depending on how long a car has been running and what type of engine it has. Generally speaking, an engine with a higher compression ratio will require more oil pressure than one with lower compression ratios.

In addition, new engines often have slightly higher readings than those that are broken in or used for extended periods of time. This is because newer parts tend to produce less friction and therefore require less lubrication from the motor oil. Ultimately, if your vehicle’s reading falls between 40-60 PSI when idling then you don’t need to worry about your car’s performance or its longevity; however, any reading below 40 should be addressed as soon as possible since it may indicate a potentially serious issue such as worn out bearings or other internal components.

Is 25 Psi Oil Pressure Good at Idle?

When it comes to engine oil pressure, 25 PSI at idle is generally considered good. In most vehicles, an ideal oil pressure range should be between 20-35 PSI when the engine is warm and running at idle. If your vehicle falls within this range you can rest assured that your engine has proper lubrication for its moving parts and no major problems are present.

However, if your oil pressure is lower than 20 PSI or higher than 35PSI then there may be a problem with your vehicle’s lubrication system and further investigation will need to take place in order to identify the cause of the incorrect reading. Additionally, it’s important to note that some engines require more or less pressure depending on make/model so checking with a professional mechanic before taking any corrective actions would be wise.

What Causes Low Oil Pressure 6.7 Cummins?

Low oil pressure in 6.7 Cummins engines is often caused by a variety of issues, including problems with the engine’s internal components, such as worn cylinder walls or piston rings; inadequate lubrication due to clogged filters or incorrect oil levels; and low-quality motor oils that can’t withstand higher temperatures. In addition, contaminated fuel injectors and valves can also cause low oil pressure since they don’t allow for proper combustion within the cylinders and can contribute to decreased performance over time. Finally, an overly rich air-fuel mixture may lead to excessive heat build up in the crankcase which causes additional stress on essential parts like pumps, bearings and seals leading to further reduced oil pressure.

As such, it’s important for owners of 6.7 Cummins engines to regularly inspect their vehicle for signs of wear and tear as well as changing their motor oils at regular intervals according to manufacturer specifications in order ensure maximum longevity from their vehicles’ powerplants.

6.7 Cummins Oil Pressure at Idle

Credit: www.dieseltruckresource.com

6.7 Cummins High Oil Pressure

The 6.7 Cummins engine is known for its high oil pressure, which can reach up to around 40 psi when the engine is running at idle. This higher pressure helps to ensure that all of the necessary lubrication and protection are provided throughout the entire operating range of the engine, helping it last longer and perform better over time. Additionally, because this type of engine runs hot due to its turbocharged design, having a higher oil pressure helps keep temperatures under control and prevent any potential damage from occurring as a result of excessive heat buildup.

6.7 Cummins Oil Pressure Problems

One of the most common issues with 6.7 Cummins diesel engines is oil pressure problems. In some cases, a faulty oil pump can be to blame; however, other causes may include clogged or blocked passages in the engine block, incorrect viscosity of oil being used, inadequate levels of lubrication or coolant contamination. If not addressed promptly and correctly, these issues can lead to serious damage to your engine resulting in expensive repairs.

Cummins Oil Pressure Range

Cummins engines operate within a normal oil pressure range of 40 to 60 psi when the engine is at operating temperature, with an ideal operating range between 45 and 55 psi. Oil pressure that falls below this range may indicate an issue with the lubrication system or other underlying problems. If your engine is displaying low oil pressure, it’s important to have a certified technician inspect the problem and repair any issues as soon as possible.


The 6.7 Cummins oil pressure at idle is a crucial factor in keeping your engine running well and maintaining its longevity. It’s important to check the oil pressure regularly, as an abnormal reading could indicate potential issues with the engine that need further investigation. If you are experiencing low or high readings, be sure to take your truck into an experienced mechanic for diagnosis and repair.

With proper maintenance and regular checks, you can keep your 6.7 Cummins running like new for years to come!


  • Zayn

    John Zayn Smith is a renowned truck enthusiast, automotive industry expert, and author. Beginning his career as a mechanic, Zayn's curiosity led him to explore all facets of the trucking world, sharing his insights through in-depth articles on TruckGuider.com. His knowledge spans truck mechanics, trends, and aftermarket modifications, making him a trusted resource for both professionals and hobbyists. Outside writing and mechanics, Zayn enjoys off-roading, truck shows, and family time. Follow his work for the latest in truck-related news and tips.

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