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Old 09-22-2016, 07:00 PM   #1
cpobimmer
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How Long Should The Oil Pressure Light Stay On At Startup?

So for the past two months, I have noticed my oil pressure light (RED) stays on longer than it used to (1-3 seconds). I have no trouble with the pressure once it's on.
Once it's been started, when I start it again after getting gas or running in somewhere, the oil pressure light goes out immediately.
Long story short, I replaced the oil filter housing hoping the check valve had failed and that's why there was additional time for the OPL to go out.
It does not seem to be the case but I did notice the drainback valve in the OFH was cockeyed when I pulled it out.

I put together a quick video of some startups to give you an idea of what I'm talking about (sorry about the quality).

Any help would be greatly appreciated to tell me I'm crazy or it's an issue (maybe with a possible solution).

Thanks for looking.

In case the video doesn't embed:


******** width="560" height="315" src="https://www.youtube.com/embed/pdw-aaM_xko" frameborder="0" allowfullscreen>*********>
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Old 09-22-2016, 07:02 PM   #2
Mango
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Eh that's fine. nothing to worry about
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Old 09-22-2016, 07:17 PM   #3
cpobimmer
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I hope you're right.
One reason I'm worried is in the other threads I've read, it seems like a majority of the people say their OPL goes out immediate upon startup.
All my Blackstone Labs oil results seem fine according to them. They all have low levels of wear metals.
I guess I'm just overreacting for no reason.
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Old 09-22-2016, 07:24 PM   #4
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just like mine
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Old 09-22-2016, 08:08 PM   #5
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Oh no this is showing signs of premature, yet intermittent, plastic oil tensioning plutonium radiating gasket rings, also known as a headmaster. Ok I don't know what I am saying here, your light is okay no need to worry
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Old 09-22-2016, 08:14 PM   #6
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Terraphantm had that issue recently, search for the thread. I believe he replaced his oil filter housing because the check valve had worn its cylinder and was sticking.
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Old 09-23-2016, 09:17 AM   #7
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Terraphantm had that issue recently, search for the thread. I believe he replaced his oil filter housing because the check valve had worn its cylinder and was sticking.

I had a similar issue with my 2001 330Ci. Replaced the OFH as it seemed that the OFH check valve was bad. The OPL seems to go out quicker, but the issue was related to how long the car sat without being started. I'll check It today as it has sat unstated since Tuesday.
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Old 09-23-2016, 10:22 AM   #8
orb
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To be safe, I'd replace the sensor, only $5 for OEM. Could be getting lazy.
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Old 09-23-2016, 10:47 AM   #9
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The physical act of the engine actually turning/running is how you develop oil pressure. You won't get instant pressure on startup. As long as you ran your engine the night before and it has good oil in it and coating the parts (particularly between bearing shells of the crank and connecting rods), you could actually theoretically run your engine just fine for 10-15 seconds "without" oil. Possibly longer. A second or two is nothing.

For people in very cold climates, there's basically no oil the first few seconds the engine is running. This is why they say startups are the most wear occurs. But that's over the lifetime of an engine.
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Old 09-23-2016, 10:59 AM   #10
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Though I have no specific experience with it, I've heard the two small o-rings on the oil filter cap can affect this.

Mine is less than a second every time unless I just changed oil.
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Old 09-23-2016, 11:21 AM   #11
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Looks fine to me
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Old 09-23-2016, 05:21 PM   #12
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That's normal, carry on.
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Old 09-23-2016, 05:55 PM   #13
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Eh that's fine. nothing to worry about
WRONG. You need to replace your entire oil filter housing as the check valve inside has failed.
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Old 09-23-2016, 05:59 PM   #14
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just order a short block while you are at it
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Old 09-23-2016, 09:09 PM   #15
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The filter housings are surprisingly cheap for what they are. A high pressure power steering hose costs more.
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Old 09-24-2016, 07:04 AM   #16
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This was mine when my drainback valve was bad:



I ended up replacing my OFH. Your's doesn't seem to be quite as bad
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Old 09-24-2016, 09:48 AM   #17
cpobimmer
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Quote:
Originally Posted by TerraPhantm View Post
This was mine when my drainback valve was bad:



I ended up replacing my OFH. Your's doesn't seem to be quite as bad
Once you replaced it, did your light go out immediately or did it still take 1/2-1 second before going out?

I went ahead and replaced the OFH.
No real difference in the light though.
I did find the drainback valve on the original OFH was a little cockeyed and wouldn't properly seal when it bounced back.

Thanks to everyone who's looked and offered their opinion.

Last edited by cpobimmer; 09-24-2016 at 09:48 AM.
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Old 09-24-2016, 10:06 AM   #18
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Originally Posted by Yewzer B Lewzer View Post
Though I have no specific experience with it, I've heard the two small o-rings on the oil filter cap can affect this.

Mine is less than a second every time unless I just changed oil.

No, those o-rings center the bottom part of the oil filter "holder" into the OFH. I know, I changed them first.
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Old 09-24-2016, 08:32 PM   #19
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Once you replaced it, did your light go out immediately or did it still take 1/2-1 second before going out?

I went ahead and replaced the OFH.
No real difference in the light though.
I did find the drainback valve on the original OFH was a little cockeyed and wouldn't properly seal when it bounced back.

Thanks to everyone who's looked and offered their opinion.
It's not instant, but it's not as long as before. I'd say 0.5-1s is accurate.
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Old 09-24-2016, 08:39 PM   #20
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Mine turns off right away with the battery light
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