Turbo John Racing Uncategorized SBC Low Oil Pressure / Oil Drainback

SBC Low Oil Pressure / Oil Drainback

SBC oil pressure issues. The new engine has some issues, this is what generally occurs when you put together all used stuff. LOL…….If you didn’t see the last video, the engine would fire up and run for a couple minutes with great oil pressure, then it would start to fall off a little and then would fall completely off to about 15psi. I would shut it off, wait a minute or two and fire it back up and then it would do the same, great oil pressure for a couple minutes then it would start to drop. I’m thinking we have a severely undersized drains in the lifter valley. This engine is normally run with dry sump equipment. Not having a dry sump with any scavanging from bottom now creates a situation where the oil is trying to drain back through the (4) small .500 inch holes. The same holes that the bottom crankcase area is trying to breath into the lifter valley through.


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