Yes, I have heard of them sucking closed shortly after startup and happened to me once with a FRam

 

well i def see me changing the filter this weekend. for some reason i prob gonna end up dropping pan. i did use the old pickup so im ordering new one of those and prob gonna take back oil pump and exchange it just to be safe. i know its new but hey wouldnt be the first bad new part ive bought before. even still on a cold start shouldnt i have more then 40 psi for oil pressure? what about pcv valve could that have anything to do with it?

 

Could be the sending unit.Does it start knocking when the gauge goes from 40-0 ?

 

pcv is not related. its just a crankcase vent.
pickup tube and screen is just a hollow pipe. unless its bent, kinked, rotted out, broke, stripped threads, or stopped up.... there's noting else to go wrong.

 

i do hear some lifter noise when pressure drops thats why i dont believe it to be the sending unit i am going to try a diff. gauge temporarily to see for sure. if its not losing pressure maybe im not letting it run long enough to build up the lifters with oil. its just hard to let it run long not knowing if there is indeed pressure or not i have alot of time and coin into this engine to watch it burn up a bearing if ya know what i mean.

 

Just curious about what kind of rebuild was done.

 

Here is a list of what i did and maybe this helps for other ideas.

1. all new bearings (crank, rod, cam)
2. new oil pump (standard volume)
3. crank spun
4. block line honed
5. new rings
6. reused roller lifters and cam
7. heads (new valve seals, reground, new guides)
8. every gasket was replaced

let me know if anyone knows something im missing. Alot of time and money invested thus far to spin a bearing. Also there was an oil gallery o ring in the kit but i couldnt see in my manual where and if this is for my application or not. Any one know where this may go if needed for my 99 ram with 5.2?

 

Looks good man. I was told to allways put a new oil pickup on an overhaul, reason said, if one tiny piece of anything gets into the pump, you can have problems.

 

What brand oil pump did you use?

Also it is possible the pump could be bad like stated above. Inside the pump is two gears and they mesh together just right and thats what creates your oil pressure.

How oil pump works

 

i bought the pump at napa not sure of the brand if its theres or what. ya know what boys im just gonna suck it up pull the pan and replace the pump and pickup again but with new pickup this time and buy a new filter for ha ha's. i need the get this pig running for the winter and deer season.