low pressure oil leak from Oil Pressure Sender
Third time on this truck. Every time the low pressure oil is shooting out of the oil pressure sender. First time we figured we had a bad sender, second time we replaced the Pressure valve assembly that is supposed to open at 75 PSI and we replaced the Oil Cooler bypass valve which was worn and catching. Second time in we tested the oil pressure which was over 100 PSI before we changed the valves, and then below 100 PSI when cold, but around 70 at 3000RPM when warm. It is back in again, same issue. Any help would be appreciated.
Just so you know ..the dash guage means you have atleast 6 psi ..that’s all it means ..
I sent a good photo of the valve ..did you do this yourself or told someone..maybe spool valve is upside down .maybe you are putting in same way it came out which is wrong ..had guy put one in wrong on a 7.3 ..luckily I knew we had good oil pressure before we took the oil cooler apart so I knew it was something he did
It appears as though you corrected the pressure fault, but another new sensor failed after that. OE Ford parts?
Agree with Marlin on this one. Some of the aftermarket switches seem a bit feeble as we have found. Will add, does it actually have the correct oil in it?
… Installed with proper socket ?… or … channel locks / vice grips / water pump pliers??? … Dan H. … Hobbs … South Texas …
Not a lot of experience on these 6.0s re: oil over pressure. On the face value I would think a stuck or sticking oil pressure relief plunger. Never had that particular issue… however 100 psi seems all kinds of wrong. Sorry, re read original and looks like you did swap out hi press control bypass.
Is the low oil pressure also over 100 PSI again?
I have seen this before. Failed oil pressure control valve (just because it is new does not mean it is not the cause), debris causing valve to stick, failed timing cover (damaged bore, warped bore, improper installation, warped cover etc.), improperly installed relief valve. Did you remove the pan and inspect for debris? Did you cut open the filter and inspect for debris? Once I installed a…
We have not removed the pan, nor has the timing cover ever been off. We did not cut open the filter but did replace it last time it was in. I'll see if it is still in the waste barrel and have him cut it open and look for debris. we did check the old relief valve and there was no debris.
On a 6 L cartridge filter I would have thought the one would be able to see the debris without cutting it open?
Glen, You can, but it is easier to get an idea of the contamination by unfolding the pleats.
So this ended up being blocked oil cooler and screen. Once we changed those out max oil pressure was 70PSI at cold startup.
Wonder why the bypass wasn't letting enough by to prevent that problem? Maybe too small for all of the volume by design?