oil pressure issues

[Kyle]

hard to tell, its the factory one. all factory hookup and sensor, just on the new block

itll still read over 40 cold

[rangerwheelinmike]

ii wonder if it could be the sending unit

[hot rod heep]

do u  have the oil pump drive rod with the steel coller on it   and not the  stock 1 with the nilon coller were the rod hooks into the pump

[gator82]

Oil pressure always reads higher when cold cause the oil is thick then it drops as the oil warms up. I got an 02 suburban that if I start it now will read around 60,then drop to around 20-25 after warm and maintains 40 while driving. Try swapping in another gauge if ya got one then try the sensor, if neither works tackle the pump. Maybe grab some from a bone yard just to test so your not out much.

[Kyle]

Oil pressure always reads higher when cold cause the oil is thick then it drops as the oil warms up. I got an 02 suburban that if I start it now will read around 60,then drop to around 20-25 after warm and maintains 40 while driving. Try swapping in another gauge if ya got one then try the sensor, if neither works tackle the pump. Maybe grab some from a bone yard just to test so your not out much.

i might just pick up a new sender from autozone. never hurts to know its new anyways i guess...

do u  have the oil pump drive rod with the steel coller on it   and not the  stock 1 with the nilon coller were the rod hooks into the pump

i got a heavy duty one off of summit with the metal collar yes

[Kyle]

would a bad oil pump make any noise while its in the oil pan at all?

[4x4xdodgeman]

I would hook up a mech gage frist. is what the persure at. is it high volume pump/ stock pump?  when the  motor is warm up watch it.  see what it is doing. with motor at idle if needle jumps around it has a spun bearing. ( did you put your motor together? or a shop?)

[Kyle]

Its a high volume pump. No it does not jump around. I put it together myself

[charlie]

Did you make sure when you put the pick up screen in that it had the right higth to the oil pan set? Is it a press in screen, if it is it could have dropped. I like to weld the screen to the oil pump so this doesnt happen. It sure sounds like you have a bearing problem, like either mains or cam bearings either put in wrong or spun. i would drop the pan check main bearings and oil pump pic up screen and replace oil pump.

[Blazin40s]

Don't blow it up....may need to tear it down again.

[Ranger Dave]

if you got  antifree  or  water down in the  oil  and it was driven  i've seen it take out  a set  of bearning.   could be  cam or  mains, rod. 

and  if you change your oil to much, that will wash out a  set of  bearning to.  i've been messing with  motors  and things way back sents the  60s, i seen a  lot of  craze things. hope  it  somthing  smiple for ya.

take a  maniual guage  and  instaill it.  sometimes  a  guage  lies to ya.

just  keep checking  you will find it.

[Squirell]

sounds like a bearing went bad to me.

[4x4xdodgeman]

kyle did you weld the pick up to pump. if not that could the noise that you said you can hear. is pick up beatting on the pan.   when you put the motor together did you check the cleances or just put it together?  do not trust any shop, people make misstakes.

[Bryank]

sounds like a bearing went bad to me.

[old school truck dude]

If youve changed the pump several times and tried different guages and sending units, you most likely have a bad bearing. If its ever been overheated or frozen with insufficient antifreeze, it might be cracked. Theres a soft plug that goes in the oil galley above the rear main bearing, is it in there?? If left out on a build, it will have fair pressure at first but drops over time as the motor develops more bearing clearance as it wears in

[Kyle]

Did you make sure when you put the pick up screen in that it had the right higth to the oil pan set? Is it a press in screen, if it is it could have dropped. I like to weld the screen to the oil pump so this doesnt happen. It sure sounds like you have a bearing problem, like either mains or cam bearings either put in wrong or spun. i would drop the pan check main bearings and oil pump pic up screen and replace oil pump.

its a press in, it had a tang for a bolt to hold it to it so i never welded it on

Don't blow it up....may need to tear it down again.

its parked. not driving it any mores....

if you got  antifree  or  water down in the  oil  and it was driven  i've seen it take out  a set  of bearning.   could be  cam or  mains, rod. 

and  if you change your oil to much, that will wash out a  set of  bearning to.  i've been messing with  motors  and things way back sents the  60s, i seen a  lot of  craze things. hope  it  somthing  smiple for ya.

take a  maniual guage  and  instaill it.  sometimes  a  guage  lies to ya.

just  keep checking  you will find it.

how can a bearing wash out???

kyle did you weld the pick up to pump. if not that could the noise that you said you can hear. is pick up beatting on the pan.   when you put the motor together did you check the cleances or just put it together?  do not trust any shop, people make misstakes.

i had just put it together. bottom end was essentially stock except for new rods and it just being machined

sounds like a bearing went bad to me.

god i hope not.... it just seems so weird that it just happened one day while drving, hadnt changed or touched anything with it in 2 weeks

If youve changed the pump several times and tried different guages and sending units, you most likely have a bad bearing. If its ever been overheated or frozen with insufficient antifreeze, it might be cracked. Theres a soft plug that goes in the oil galley above the rear main bearing, is it in there?? If left out on a build, it will have fair pressure at first but drops over time as the motor develops more bearing clearance as it wears in

havent changed the pump or anything yet. got a new one on its way. never been overheated since rebuild and it was rebuilt even before i got it and all freeze plugs were redone when i had machining one

[Bowtie972]

As Ranger Dave said, if the antifreeze got into the oil it can dilute the oil, essentaially washing the oil coating off the bearing surface. Which will cause bearing and/or crankshaft damage.  

As far  as pick up tube, always a good idea to tack weld it on the pump.  I had one fall off in a truck i bought, wiped out the crank.  

As much as it sucks, if it was my engine i would drop  the oil pan and pull some bearing caps off and see how they look, and check the oil pump and pick up too

[Kyle]

i got a new pump and pickup ordered and should be here in a couple days. ill make sure to tack or weld it all on this time for sure

what would i be looking for if i pull a main cap off?

[Bowtie972]

Look for big wear or discoloration in the bearing surface, they should look like new still.  Also check to see if the bearing spun itself.  Did you check all your rods and mains with plastigage for clearance when you were assembling it?

[Kyle]

Look for big wear or discoloration in the bearing surface, they should look like new still.  Also check to see if the bearing spun itself.  Did you check all your rods and mains with plastigage for clearance when you were assembling it?

no i did not, dont have very many checking guages. just a dial indicator, calipers and a few micrometers