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New gen 3 engine low oil pressure

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Zrussian13

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Most companies recommend 5w50 when boosted I think which obviously would increase pressure
Yes but I ran the last engine with 5-30, 0-40 and 5-50 and had no issues with any of them. Even 50 weight on the new engine gives the same readings so I'm hunting for the actual issue in the motor.
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Zrussian13

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It's possible oil restrictors or lack there of, on the turbos can effect oil pressure as seen by sensor.
Ok I thought that was where you were going with it. I'll double check they are in but I'm 99.9% sure they are. I was very meticulous with labeling and taking my time with the install but anything is worth a second look at this point. Thanks.
 
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Zrussian13

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Anyone see anything unusual? Finally started opening everything up and didn't find anything sticking out. Pumped oil through the engine and flow looks good at this point, it was consistent everywhere. I'm going to pull the chains and gears tomorrow and scope everything as much as possible but so far I can't find an issue. Anyone have any other ideas? Right now I'm open to anything! Lol
 

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Anyone see anything unusual? Finally started opening everything up and didn't find anything sticking out. Pumped oil through the engine and flow looks good at this point, it was consistent everywhere. I'm going to pull the chains and gears tomorrow and scope everything as much as possible but so far I can't find an issue. Anyone have any other ideas? Right now I'm open to anything! Lol
I think the short block is just defective with an enormous clearance(s) somewhere there shouldn't be one. If you work backwards far enough and don't see anything that you did wrong there isn't much else it could be. In a post covid world new doesn't mean good unfortunately.

Maybe try plastigauge on a few rod bearings and mains if you can to see if they're in spec
 
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Zrussian13

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I think the short block is just defective with an enormous clearance(s) somewhere there shouldn't be one. If you work backwards far enough and don't see anything that you did wrong there isn't much else it could be. In a post covid world new doesn't mean good unfortunately.

Maybe try plastigauge on a few rod bearings and mains if you can to see if they're in spec
Yeah unfortunately quality was going down before covid but that sure did excellerate things. If I don't find any blockages once the gears are out I think I'm going to assume it's bad gears for now and throw a new set in there and see what happens. If I still have low oil pressure at that point I'll have to pull the engine and do a tear down but for now I'll assume ford has built enough coyotes that hopefully they got that much right and it's just defective gears.
 

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Yeah unfortunately quality was going down before covid but that sure did excellerate things. If I don't find any blockages once the gears are out I think I'm going to assume it's bad gears for now and throw a new set in there and see what happens. If I still have low oil pressure at that point I'll have to pull the engine and do a tear down but for now I'll assume ford has built enough coyotes that hopefully they got that much right and it's just defective gears.
I thought you changed them already, are they oem gears?
 
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I thought you changed them already, are they oem gears?
I have not. It's an oem ford long block stock gears. Just finally made time to open it up and start digging for the issue.
 

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And that's the weird thing. I can't find an oil pressure spec other than idle and 2k rpm. Which both are on par with what's in the owners manual and what my old engine showed. The only thing that doesn't line up with the old engine is at wot the old engine went 90-100psi. But when I trouble shoot on alldata it just says verify oil pressure is correct before troubleshooting the sensor circuit. I verified it has pressure, 40- 60 psi running with the gauge plugged in, instead of the sensor but I do r know how to verify if that's correct.
The PP1 guage is just suggested oil pressure. Mine spikes right to 100psi cold start. It then settles to 40psi at idle and the drops to just bellow 20psi at idle. Initial drive it sits around 45psi at 2000rpm. After a couple of stops, it shoots up to 95 while driving. Once it gets hot it cruised at 80psi. This a Gen 3 Roush set up with 5w50 oil and ford racing filter
 

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Anyone have any other ideas? Right now I'm open to anything! Lol
I see oil filter has been mentioned twice so far, but you haven't stated that you've replaced it yet. It's a long shot, but.. maybe not that long. One member here recently posted a picture of a bad motorcraft filter.
 
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The PP1 guage is just suggested oil pressure. Mine spikes right to 100psi cold start. It then settles to 40psi at idle and the drops to just bellow 20psi at idle. Initial drive it sits around 45psi at 2000rpm. After a couple of stops, it shoots up to 95 while driving. Once it gets hot it cruised at 80psi. This a Gen 3 Roush set up with 5w50 oil and ford racing filter
Yeah pp1 gauge isn't very accurate. It's a decent way to know you have some pressure but it was always 5-20 psi off compared to the mechanical gauge I had hooked up.

I see oil filter has been mentioned twice so far, but you haven't stated that you've replaced it yet. It's a long shot, but.. maybe not that long. One member here recently posted a picture of a bad motorcraft filter.
Thanks. I did try a new one when I filled it up last time after putting the oil pan back on.

I'm going to finish pulling the gears out tomorrow morning and look through everything. Work got crazy and I wasn't able to get back out to finish tearing it down yet. Hopefully I can get to the bottom of it and start putting it back together soon!
 

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I know it's a bit late but did you check the by-pass spring and the by-pass solenoid? I doubt factory gears would have failed, but one never knows.
 

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Thanks. I did try a new one when I filled it up last time after putting the oil pan back on.
Speaking of the oil pan....Are you 100% positive the pickup tube is installed at the correct depth? Too close to the bottom and you'll get exactly what you're describing.

Ninja edit... Just remembered it's a factory longblock... surely that isn't the case. But at this point, worth a check anyway I suppose.
 
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Zrussian13

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Speaking of the oil pan....Are you 100% positive the pickup tube is installed at the correct depth? Too close to the bottom and you'll get exactly what you're describing.

Ninja edit... Just remembered it's a factory longblock... surely that isn't the case. But at this point, worth a check anyway I suppose.
It's also built into the pan on the gen 3s so I'm not sure what I'd to do it that was the problem! 🤣
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