LS3 Crate Engine with no oil pressure
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LS3 Crate Engine with no oil pressure I really need some help here. I have a brand new LS376/480. I have tried 3 gauges (two electrical and one mechanical) and can't get an oil pressure reading. I removed the gauge and cranked the engine and nothing. I removed the oil filter (which was full of oil) and cranked the engine. Not a drop came out. After talking with GM and hearing about some problems with the o-ring and/or the relief valve spring, I dropped the pan. Before going any further, I thought I would zip tie a plastic bag to the pick up tube and give it a couple cranks. It wanted to suck the bag inside out. It looks like the pump is actually working. What do I need to look for? Any help would be greatly appreciated.
Mike
Mike
I had to pull a plug on the side of the motor(drivers side front)and use a vacuum pump to pull oil through the oil pump to prime it. Once I got oil there it had oil pressure after that. I had previously stuck a oil funnel in the oil pressure port where the oil pressure switch normally goes and gravity fed oil for days thinking it would prime it the other way.
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Found the problem. The o-ring on the oil tube pickup was pinched. Luckily, the pinched part didn't break off and I have to fish it out of the system. Per GM, this is a known problem with the LS3 engine. You would think GM would have fixed it by now.
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I really need some help here. I have a brand new LS376/480. I have tried 3 gauges (two electrical and one mechanical) and can't get an oil pressure reading. I removed the gauge and cranked the engine and nothing. I removed the oil filter (which was full of oil) and cranked the engine. Not a drop came out. After talking with GM and hearing about some problems with the o-ring and/or the relief valve spring, I dropped the pan. Before going any further, I thought I would zip tie a plastic bag to the pick up tube and give it a couple cranks. It wanted to suck the bag inside out. It looks like the pump is actually working. What do I need to look for? Any help would be greatly appreciated.
Mike
Mike
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When the new engine comes in, I’d run a pan baffle and a pick up brace ( EGM-500) from IMPROVED RACING for a pc. of mind. I’d reseal(R&R) the pick-up tube to make sure it’s done correctly. I’d also prime/pressurize the oiling system until oil comes out all of the rockers BEFORE ever turning the motor over.
a lot of people may think that’s a wast of time, I considering it a investment .
Last edited by Jimbo1367; May 1, 2021 at 07:43 AM.
