At the first week of idle the oil was at about 3 or 4 bars, which is roughly around 40 psi.

After letting it run for its usual 30 mins for a few times over a week, I decided it was time to drive it. Seemed to be fine. After 3 weeks into the startup I took it to town the other day and after 5 mins into the drive I realized my oil pressure is dropping down past 1 bar, about 14 psi or less. The chevy mech man here told me the engine only need 4 psi per thousand to run.

It has a brand new oil pump and brand new everything. I am running royal purple break in oil. I took the pressure sender off and tried to hook my manual gauge up but it only reads 25psi or above. So no go, I unhooked the oil sender and cranked the engine and the oil came out. So I have oil traveling my engine.

There is no over heating problems, oil level is good and there are no leaks or unexplained smoking like a bad seal some where. Checked the gauge and have full movement when grounded. I am not sure what to do next. Please help.

 

https://ls1tech.com/forums/generatio...ter-break.html

 

Just to clarify a little, on my setup I am running a remote filter kit. The pan has ports on it that the oil lines connect to and run to the filter.

I unhooked lines and had my wife turn the key over and saw oil come out of both lines, in and out, instead of just one.

Does this sound like a pump issue?

 

GMs troubleshooting list for low oil pressure is as follows:
Oil pump worn or dirty.
Oil pump-to-engine block bolts loose.
Oil pump screen loose, plugged, or damaged
Oil pump screen O-ring seal missing or damaged
Malfunctioning oil pump pressure relief valve
Excessive bearing clearance
Cracked, porous, or restricted oil galleries
Oil gallery plugs missing or incorrectly installed.

Since you cannot even get the 25 psi minimum required by your gauge the oil pump cannot be ruled out. I am not sure what having oil come out of the input and outlet ports of the remote filter setup indicates about the oil pump.

 

well I am hoping for something small, I just spent 7 months building this motor. I am going to drop the pan and see if there is anything there that is an issue. I do not know the history of the block except that it had be fitted with new forged pistons and rods and was freshly homed. I doubled checked every clearance and it was good.

Thanks for the advice

 

Based on numerous threads in this forum the prime suspect is that pesky o-ring. Good Luck.