hello guys i need so help i melted a piston in my old 4.8 so i found a 6.0 to drop in i swapped over the cam from the 4.8 to the 6.0 and also swapped over the timing chain, sproket and oil pump (all these are aftermarket parts)
finally i went to start it up and i have no oil pressure so i tore the motor apart again to swap out the oil pump with the stock one that came originally with the 6.0 put it all together and still no pressure i even swapped the O ring to make sure that wasnt contributing to the problem im using the 6.0 pickup tube and im using the 4.8 oil pan cause i have the turbo return line fitting welded on it please help im lost now

 

Check the oil pressure with a manual gauge and report back.

 

Hey man how u been well i dont have a manuel gauge but i checked the oil filter and its not getting oil also i disconnected the oil feed line to the turbo to see if i had oil getting to the turbo and also had nothing when i check the oil level its over like normal before the start up of an oil change

 

Did you install a junk yard engine? Do you know if engine was any good to begin with?

 

Motor is a yunkyard motor fires up fine and idles good other than the oil pressure thing

 

have the same problem put in new oil pump to and o ring and oil sending unit had little oil pressure for like a day now hardly anything again

 

do or did u have a oil cooler setup on your motor

 

If it runs and idles fine now its not going to stay that way long with no oil pressure.

 

thats true lol i havent turned it on at all after i notice the oil pressure lost and im not planning on turning it on until i can figure out the issue