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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Oil pressure switch leak.



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      02-08-2019, 12:32 PM   #1
bsad0521
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Oil pressure switch leak.

Has anyone ever had a leak from the oil pressure switch on the OFH. I just replaced my OFHG and OCHG. Maybe the switch is loose? not sure if I just tighten it down a little or buy a new one.
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      02-08-2019, 12:36 PM   #2
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Switch?
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      02-08-2019, 12:41 PM   #3
bsad0521
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Switch?
sensor? Im not sure what its called lol
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      02-08-2019, 12:42 PM   #4
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Quote:
Originally Posted by bsad0521 View Post
Has anyone ever had a leak from the oil pressure switch on the OFH. I just replaced my OFHG and OCHG. Maybe the switch is loose? not sure if I just tighten it down a little or buy a new one.
Tighten it and see if that works, if it doesnt, buy a new crush washer for it. I've never heard of this leaking though so are you sure it's leaking from there?

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Originally Posted by Wolf 335 View Post
Switch?
The oil pressure switch on the OFH is just a switch, not an analog sensor. It only sends an on/off signal based on whether oil pressure is above or below a certain threshold. That's why if you look closely it's only got 1 wire coming out of it.
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      02-08-2019, 04:52 PM   #5
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Quote:
Originally Posted by Joester View Post
Tighten it and see if that works, if it doesnt, buy a new crush washer for it. I've never heard of this leaking though so are you sure it's leaking from there?



The oil pressure switch on the OFH is just a switch, not an analog sensor. It only sends an on/off signal based on whether oil pressure is above or below a certain threshold. That's why if you look closely it's only got 1 wire coming out of it.
Thanks a ton. There's a tiny bit of oil right under it and all the seals where the gaskets lie are dry so I suspect the switch. Is there a torque spec for it?
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