Well, the ECU/PCM is in control of the engine and its vital function. The ECU/PCM will shutdown the engine if the parameters are not met, either high or low. And it might cause paranoia if you see what you perceive as low oil pressure when the ECM/PCU, as programmed by the engineers who designed the 6.7 engine, thinks is adequate. They give you the vitals most need to watch when towing.

I suppose if you wanted an oil pressure gauge, you could add one.

 

There's an oil pressure switch. When the pressure is too low a alert message will be displayed. You will know it's time to be concerned if oil pressure drops too low.

 

Yeah, ...I want a gauge, cause 7psi warning is just not gonna cut it. Need to know way before that level for the health of the engine.

 

If you use a quality oil that's not going to be a problem. I say this as I'm one who pumped out enough oil, due to not tightening the oil by-pass filter line properly, to cause all the dash alerts. I had to add back in at least 8-10 quarts. That 2006 6.0L went 289k modded and still had the original injectors from the factory.


So a smart choice in oil is more important than some oil pressure sensor in my book.

 

LoL, yeah seen those infomercials where they took the drain plug out and ran the vehicle all day ...want some of that stuff

 

I didn't say drain the pan .

 

I was mainly wanting a gauge to monitor the health the motor as the miles increases

 

well.....you can add one, but you need one that reads less than 50psi and very accurate......the oil pressure switch is above the oil filter.

 

Less than 50 psi? I am in no way an expert on the 6.7, but if ford has designed an engine that does not exceed 50 psi of oil pressure even at cold idle, then I need to figure out how I'm going to unload mine. My 6.0 could easily hit 80 psi cold and ran ~60 psi hot at speed at 200k miles. I'd expect no less of the 6.7.

As to the specs posted above, if the PCM is monitoring those values, is it available to be monitored through normal options? I'm new to the 6.7, but not to Ford. I know previous engines only had a switch that threw a light or dropped the gauge if the pressure dropped below about 7 psi. Is this different on the 6.7? I've looked for a PID on my NDash, but haven't ran across one that I thought was it. They are not necessarily named for easy recognition on the NDash. If it's not monitored by the PCM, how can you expect it to shut down the engine when the pressure is dropping to levels below those specified. Sure, it could kill the engine when the switch finally fell below 7 psi, but as stated, it's usually too late then.

I'm not arguing. These are serious questions.

 

Less than 50 psi? I am in no way an expert on the 6.7, but if ford has designed an engine that does not exceed 50 psi of oil pressure even at cold idle, then I need to figure out how I'm going to unload mine. My 6.0 could easily hit 80 psi cold and ran ~60 psi hot at speed at 200k miles. I'd expect no less of the 6.7.

As to the specs posted above, if the PCM is monitoring those values, is it available to be monitored through normal options? I'm new to the 6.7, but not to Ford. I know previous engines only had a switch that threw a light or dropped the gauge if the pressure dropped below about 7 psi. Is this different on the 6.7? I've looked for a PID on my NDash, but haven't ran across one that I thought was it. They are not necessarily named for easy recognition on the NDash. If it's not monitored by the PCM, how can you expect it to shut down the engine when the pressure is dropping to levels below those specified. Sure, it could kill the engine when the switch finally fell below 7 psi, but as stated, it's usually too late then.

I'm not arguing. These are serious questions.

The PCM doesn't need to monitor a specific value. That's why it uses a switch. When the switch trips it starts the process of message alerts, warnings....etc etc etc. The "switch" is set at the value 10PSI ( or whatever the value) to allow the voltage to trigger the PCM into action. All that is another reason there is no PID.



7PSI or 10PSI maybe too late for you, but for someone who engineered the 6.7L it's nothing to worry over.

 

Its just a switch. On/off.
No ability to monitor specific pressure through it

 

Oil pressure is a myth over the years that it needs to be 50, 70, 80 or more psi. The key is not pressure but volume. Oil pressure can be regulated by the relief bypass spring in most oil pumps. As long as you have adequate pressure and the proper volume of oil circulating, you can keep the bearings and other moving parts from over heating and reduce the wear. In fact, excessive oil pressure can "wash out" the bearing material which in turn causes low oil pressure.

 

I agree volume is more important than pressure, but you need pressure to insure the volume is delivered.

7 psi or even 10 psi of pressure will not do that at 3000 RPM.

I'll agree to disagree on the need for accurate oil pressure measurement. I prefer to know I have a sufficient supply pressure rather than depend on the PCM to determine it. I haven't added a pressure gauge to my truck yet, but it is something that I may very well do in the future.

 

At 1800rpm, the oil pressure should be approx 35psi. 1800 rpm is cruising rpm for most of us.

 

That is just a minimum spec -- basically CYA for Ford

Normal running pressure for a healthy engine is ~60 psi hot -- nice thing about a gauge is the operator can monitor what is "normal" and when it is not.

The 7psi "idiot" system is only a good check at idle -- does it work for the unwashed masses, yes -- but for those that are interested in the longevity of these engines, only a gauge will do.
.

 

but if ford has designed an engine that does not exceed 50 psi of oil pressure even at cold idle, then I need to figure out how I'm going to unload mine.

Up until yesterday at 8:30 PM ignorance was bliss......NOW you are scared??? LMAO Pretty sure your efforts will be exhausting to find a new truck that uses oil PSI in it's system displays.

I prefer to know I have a sufficient supply pressure rather than depend on the PCM to determine it.

The PCM doesn't correct or mandate oil PSI, that's what the oil pump/low pressure gears do for the motor. The oil pressure switch is just used to tell the PCM to send the dash alerts.


If you want a pressure gauge then install one and be happy.

 

You have misinterpreted my post and taken it out of context. This seems to be a recurring issue.

The comment was rhetorical and based on Larry's assertion that you didn't need a gauge capable of more than 50 psi and that Ford designed the engine to not exceed that.

You don't NEED a fuel pressure gauge on a 6.0 either, but having one can save your injectors if you choose to watch it occasionally.

 

This is the first diesel I owned. I just thought a truck that is so expensive and expensive to repair your oil pressure would be a good thing to keep an eye on. The Dodges have it in the display.

 

If the design is anything like the 6.0, the warm idle vs. cold above idle pressures are pretty far apart (20psi hot idle, 60psi cold idle, 60psi hot off idle, and 80psi cold off isle). My suspicion is that most folks would be bringing in their truck for warranty or service thinking something was wrong if the gauges read actual pressure. In the old days gas engines had a much narrower range so an actual working gauge was OK

 

Thought I would pipe in to this old thread. I have run an oil pressure gauge for awhile on my 2015 KR 6.7. At idle it reads 30psi and at 1500rpm i get 50 psi. Basically it raises by 10 psi for every 500 rpm increase