Hey guys
Just fired up a refreshed 496 BBC for my 82 c10. Had the motor in a different truck before, oil pressure was fine then usually 20 lbs+ at idle when warm.
Decided to do a roller cam swap when I swapped to the new truck. Also went with a different oil pump and pan. The pump and pan combo are a Moroso combo, both 8" pan clearance. The pump is a std volume and pressure unit with a bracketed and welded pickup tube. Running 15W40 rotella, and a straub cam with Morel roller lifters.
We primed the motor before starting, read 12-15 psi when doing so. This was somewhat strange, as I feel like remembering over 30 psi when priming the previous build. Went ahead and fired it up though. The truck would idle around 12-15 psi and around 2000-2500 would hold 25 psi. I'm feeling like this is low for a new build and am trying to come up with an attack plan to diagnose what the issue might be. I pulled a rocker cover and confirmed the top end was oiling, so I'm not worried about anything having been damaged during this time.
The old build had less than 500 miles, and main and rod journals were plasti gauged within tolerance. I'm gonna start with swapping the oil filter and opening the old one to see if it is collapsed or faulty. It currently has a wix on it. Might also try a different gauge at this point. After swapping this, if it's still a problem, probably will pull the pan and check both the oil pump and filter bypasses, as well as the pickup to pan clearance. It should be an issue, given they're matching parts from moroso but figure it won't hurt to check.
After that, there's not much I can do without some serious disassembly. If it comes to that I'll probably pull the intake to check lifter bores, and then after that the timing cover and cam journals.
Let me know if I am missing anything or if you have any suggestions. Thanks!
Just fired up a refreshed 496 BBC for my 82 c10. Had the motor in a different truck before, oil pressure was fine then usually 20 lbs+ at idle when warm.
Decided to do a roller cam swap when I swapped to the new truck. Also went with a different oil pump and pan. The pump and pan combo are a Moroso combo, both 8" pan clearance. The pump is a std volume and pressure unit with a bracketed and welded pickup tube. Running 15W40 rotella, and a straub cam with Morel roller lifters.
We primed the motor before starting, read 12-15 psi when doing so. This was somewhat strange, as I feel like remembering over 30 psi when priming the previous build. Went ahead and fired it up though. The truck would idle around 12-15 psi and around 2000-2500 would hold 25 psi. I'm feeling like this is low for a new build and am trying to come up with an attack plan to diagnose what the issue might be. I pulled a rocker cover and confirmed the top end was oiling, so I'm not worried about anything having been damaged during this time.
The old build had less than 500 miles, and main and rod journals were plasti gauged within tolerance. I'm gonna start with swapping the oil filter and opening the old one to see if it is collapsed or faulty. It currently has a wix on it. Might also try a different gauge at this point. After swapping this, if it's still a problem, probably will pull the pan and check both the oil pump and filter bypasses, as well as the pickup to pan clearance. It should be an issue, given they're matching parts from moroso but figure it won't hurt to check.
After that, there's not much I can do without some serious disassembly. If it comes to that I'll probably pull the intake to check lifter bores, and then after that the timing cover and cam journals.
Let me know if I am missing anything or if you have any suggestions. Thanks!
