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Old 09-28-2020, 06:10 PM   #1
Gib_ham
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Default Oil pressure issue on new engine

Hello everyone

I have an oil pressure issue with my ej20 thatís leaving me baffled. I was hoping someone could help

I just finished to a built forged engine

When I put the engine in the car I added a mechanical oil pressure gauge that connected to the engine using a sandwich filter

On Initial start up I pulled the cam sensor plug and cranked engine until the oil psi light on the dash went out


I then proceeded to start the engine. The mechanical gauge climbed to 100 psi. The car ran for approximately 30 seconds to a minute

Out of nowhere the oil light returns on the dash but the mechanical gauge it still holding steady between 95 and 100 psi

I assume that the oil pressure switch has went bad. So I replace the oil psi switch and the dash light is still on. (Oil psi still 100 at mechanical gauge

At this time I pulled the oil pressure switch off again and connected the mechanical gauge to that port

I had nothing.

100 psi at sandwich filler adapter and 0 at the top of the engine

Pretty sure I hurt my brand new engine and I have no idea why

Iíve never seen a motor with oil psi at one spot and not another
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Old 09-28-2020, 06:53 PM   #2
JDMJNKY
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What weight oil?
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Old 09-28-2020, 07:46 PM   #3
Gib_ham
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Quote:
Originally Posted by JDMJNKY View Post
What weight oil?


It was 10w40 motul break in oil. After writing this post, I figured out what the problem was. Either the sandwich adapter that I used, or the oil filter was bad. On the advice of someone else, I removed the oil filter and the sandwich adapter and then put a new filter on without the adapter and the oil pressure came back up to normal operating pressures
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Old 09-29-2020, 01:57 AM   #4
JDMJNKY
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Awesome. Glad you found the source.
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Old 09-29-2020, 08:58 AM   #5
whiterabbitrexy
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Quote:
Originally Posted by Gib_ham View Post

On Initial start up I pulled the cam sensor plug and cranked engine until the oil psi light on the dash went out


I then proceeded to start the engine.
You started the car with the cam sensor pulled out ? Sorry i didnt read where u connected the plug back in ?
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Old 10-22-2020, 02:59 PM   #6
saaiello21
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Best place to get oil pressure reading from is the galley plug by the turbo inlet. You can use an adapter and extender to remote mount sensor.
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Old 10-22-2020, 08:09 PM   #7
KillerBMotorsport
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Quote:
Originally Posted by saaiello21 View Post
Best place to get oil pressure reading from is the galley plug by the turbo inlet. You can use an adapter and extender to remote mount sensor.
We recommend reading pressure at the top front port. This location is before any passages split of feed any mains. The rear port is after the mains and will always show a lower pressure than what the pump output actually is.

If your gauge has a settable warning light or buzzer, set it for the minimum allowable oil pressure 14psi. The oil pressure 'idiot light' can be removed without any ill effects; it will not illuminate once the car starts.

If you must have the OEM idiot light, move it to the rear port. The OEM switch illuminates at 2.1 psi, so moving it to the rear port means it will illuminate at a higher pressure making it a little less of a 'your engine just blew up' light.
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