oil pressure issue?

[asrnj77]

So when my heater core blew I routed the core lines together and the truck ran better but not like it did before the core blew out. I noticed the oil pressure gauge would be at 0 and after 10-15 min of driving it would creep up a bit on the stock gauge. It took a while to warm up and would hesitate until warmed up. It wouldn't really build much boost either. I didn't put a lot of faith in stock oil pressure gauge so wasn't sure. Haven't had a whole lot of time to look into it but was planning on checking fp, vacuum lines, etc.
Fast forward to yesterday...I parked it in front of my friends house over night and in the morning the oil pressure gauge went up to the half way mark and now the truck builds boost and was driving like it was before the heater core issue. Any idea what might be going on? Where do I begin? Thanks!

 

[Syclone#2960]

Re: oil pressure issue?

I would 1st replace the oil psi sending unit located above the knock sensor. If oil psi is not detected the motor will shut off or not start.

 

[asrnj77]

Re: oil pressure issue?

I'll take a look at sending unit but it's always started..just after the heater core issue it had long morning cranks like maybe fp was low. I was just really surprised about the sudden rebound in oil pressure. Here is a pic of the motor...for what its worth :roll: