[willy_pipe_welder]

4100km on my rig.

Ever since last oil change
I have had hi oil psi. 40 psi at idle 52 54 psi @2000 rpm

 

[sawdustmaker]

Remember that it is a dummy gauge.

Im not really sure what you are trying to say is odd.

 

[willy_pipe_welder]

dam iphone aoto corect im saying that the gauges in dash are reading high'er than normal

 

[sawdustmaker]

This is what im talking about.

This is why I did the oil pressure gauge. Tells ya a little different story than that dummy gauge on the dash.

PSI at idle.....

PSI at 1000 RPM.....

PSI at 1500 RPM.....

 

[simplysmn]

your gauges are way off

 

[sking]

Did you change the weight of oil used? Do you have the correct amount of oil? Those are the first 2 things that come to mind with higher oil pressure.

 

[willy_pipe_welder]

locol dealer did the oil change no change in oil type and ive been keeping eye on oil level , it has been looking good

 

[sawdustmaker]

Ok this guy was talking about a CR 5.9 but it may be the same with the 6.7s i dont know.

Not gonna blow any seals, that's why there's a relief valve in the filter head.....it's under the nut that's just forward of the oil filter.

The factory oil pressure sensor is located on the driver side of the block. it's nothing more than a 5 psi Hobbs switch. As long as it see's 5 psi, the oil pressure that you see on the dash is a "calculated" pressure by the ECM. It bases the oil pressure on the engine RPM and temperature and that's what's displayed on the dash.

If it doesn't see 5 psi, then it sets the MIL.

As you can see, it's not even close to the true pressures at the filter head.

The minimum spec for oil pressure is 10 psi at idle and the pressure should rise 10 psi for every 1000 RPM at a minimum.

 

[toyota_mdt_tech]

Did oil weight change? Thicker oil means higher oil pressure. Or maybe the old oil was so broken down and thin from fuel contamination and its more normal now. Cold winters, it will be higher till that oil has absorbed heat. So on colder startups, it will be higher too.

 

[ZOP]

The gauge on the 2011's and 2010's is actually very accurate and driven from the ECM's pressure sensor. It's not very precise (mines marked at something like 0,20,40,80,100) -- that said my 2011 seems to hold around 40ish at idle, and 60ish at anything off idle. I can probably log it if I get a chance to sometime soon.

 

[UncleBubbles]

The ECM has no pressure sensor. All it has is a switch, higher than 6 PSI, on. Lower than 6 PSI, off. 30 seconds of below 6 PSI will cause the ECM to shut down the engine. The gauge is just what the ECM thinks oil pressure is, based off engine temp, run time, rpm, load and some other factors.

 

[sawdustmaker]

The ECM has no pressure sensor. All it has is a switch, higher than 6 PSI, on. Lower than 6 PSI, off. 30 seconds of below 6 PSI will cause the ECM to shut down the engine. The gauge is just what the ECM thinks oil pressure is, based off engine temp, run time, rpm, load and some other factors.

You know for sure if this is true for the 2010+ trucks?

 

[ZOP]

You know for sure if this is true for the 2010+ trucks?

I know that the ISB5.9L came some years with a sensor, others with a switch (switch is 2 wire or sometimes one wire with the block being the ground return, sensor is 3 wire) -- and that the sensor may have been discontinued and superseded by the switch. I haven't actually looked on my 6.7L and I am not even sure the switch or sensor would be in the same location on them either.

FWIR trucks/applications with the switch in the ISB5.9L will read 55PSI constantly once the truck has pressure. I had assumed that the 6.7L came with a sensor but I don't have enough data to say for a fact or not, nor for what years.

 

[sawdustmaker]

Thanks for clearing that up a little bit... I am considering putting an actual gauge on mine.