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Front oil galley plug behind the cam gear... fired it up 58 psi... thanks everyone for the help

However im convinced the pressure regulator plunger is stuck ... guess i get it to donit all over again tomorrow..

Updated..pulled the oil cooler housing ..verified gaskets are correct changed pressure relieg, installed new oil pressure switch .. fired it up ..still 6 psi at idle..10 psi at 1k rpms ... i could drop the oil pan and make sure the pickup tube is tight but im 99% sure it is fine .. also has new...

I have a new pressure relief valve on hand... i plan to take a look here in the next day or so .. ill keep you guys posted... and the gaskets came from Cummins off the S/n on the block so id assume their correct but ill double check..thanks!

Motor is a fresh build .. pan to carb (minus the carb) lol... this is the first time its been running

While trouble shooting ..no longer then 1 to 2 minute intervals ... the low psi scares me ... any ideas why the low pressure? .. the mechanical gauge worries me as well... its brand new but its a harbor freight special

I also had plugged in the new switch into the wiring harness but did NOT install it into the block oil pressure still read 50 on the dash ..my thought would be that it read zero due to not enough psi (6 psi)

Ok .. yea i have a new sending unit just haven't installed it yet need to get the right size socket ...Its 6-7 psi at idle... i said roughly 10 because when i have my buddy hold it at 1000 rpm he could be a little above or below... also the oil pump is brand new ... prelubed and prime it to the...

So im having issues with oil pressure on my 06 5.9 ... i currently have a mechanic gauge hooked up to the top of the oil filter housing... i get roughly 10psi at 1000 rpms ... the issue is my oil pressure gauge on the dash reads 50ish psi but the sensor isnt even plugged in ... as soon as i...