engine startup and no oil pressure... NEED HELP!!!

[Frenchy]

The o-rin is on the pickup where it goes into the pump. They're a fairly fickle thing, you have to be careful with them

[Beatdown Z]

It took my 6.0L 5-10 seconds to build oil pressure when I swapped it in. Try pulling the spark plugs and unplug the injectors and cranking it over to see if it builds pressure, unless you have reason to believe its a bad pump or o-ring.

[o2camaross]

man, that grinding noise that you described scares me. I would first check to make sure the timing chain clears the oils pump and the timing cover. If it does, then pull the cam out and get a flash light and look into the engine via the cam hole, make sure you can see that all 5 cam bearings are still in. If all that is ok, then put it back together very carefully and make sure the cam timing is correct. spin it over by hand and make sure you dont feel any bind up. look at the journals on the cam when you take the cam out and make sure you dont see any wear marks

[skeet]

for a double roller you have to modify the front cover, well at lease i did a mellon pump will hit it where the front seal is, check and make sure you didnt crack it

its always good to pull ignition relay and fuel fuse so it wont fire off, turn engine over 5 seconds at a time to build oil pressure..

[11 6.2]

The o-rin is on the pickup where it goes into the pump. They're a fairly fickle thing, you have to be careful with them

This is what im thinking. Its what happened to my 6.0 when i swapped it in my old truck. engine sat with no oil for too long and the o ring dry rotted. Put new o ring on, problem fixed immediately.

[kbomhower]

so i think i figured it out guys. when i put the double roller timing chain set on it moved the oil pump out a bout a 1/8 to 1/4 inch. and the oil pickup got moved just enough so that it set a little sideways and was breaking the seal. so i pulled it all off and am putting the stock one back in to see if it fixes the problem. but i want to run the double roller setup so what do i have to do?? pull the whole engine to get to the pickup to bed it enough to lineup??