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[csepet]

Hi!
I recently started reviving a 1998 2.5 V6 omega with 170k kms as a project car.
After a lot of work i got the car up and running pretty nicely, however after my first longer drive in it i noticed that the oil light flickers at idle when the car is really hot.
It has new:
-oil (5W-40)
-oil filter (newer cartige style), oil press pressure sensor

What are the common couses of this? I doubt its excessive engine wear as it sound really nice, however i do know that is was neglected for about 4 ish years before being parked in 2012.
I have read that the relief valve could get stuck but where do i find that?

[Doctor Gollum]

It's built into the oil pump. Worth dropping the sump pan and checking the pick up strainer for and debris.

Also you might try 10w40

[TheBoy]

As Doctor Gollum suggests, check the oil pickup (which is always worth doing, despite the slight mess and hassle - plus you can clean the sump out at the same time - and consider using a slightly thicker oil.  10W40 Semi Synth was the original spec for that age Omega.

[mong00sehun]

bojler elado  idovel elmeletileg tud degradalodni az olajpumpa, de nagy esellyel nem errol van szo. volt egy post nemreg egy 3.0-rol ott is hasnolo volt az eset, lehet hogy a homerseklettel osszefugg? (nyar)
as https://mymotorlist.com/ said, the oil pump can degrade over time... there was a 3.0 with similar problem maybe you can get some info from it: https://www.omegaowners.com/forum/index.php?topic=151576.0

[csepet]

Thanks for the help, cleaning the sump was the right call. The bottom of the pan had around 2 milimeter thick layer of jellyfied oil, but i think the issue was caused by the pickup being blocked partially by the jellyfied oil and the o ring for the pick was also extremly flat. Anyway the issue seems to be resolved.

[Migv6 le Frog Fan]

Good news. 

[polilara]

Nice to hear, did you change to 10W40, too? This is what I use in my Y26SE.
https://www.trodo.fi/moottorioljy-opel-gm-10w40-5l?utm_source=google&utm_medium=cpc&utm_campaign=shopping_t20&gad_source=1&gad_campaignid=22470045317&gbraid=0AAAAAC_8U8_hiAaWV1cRG2oKzkOwlgePa&gclid=Cj0KCQjw64jDBhDXARIsABkk8J4orI0msZkq0kPgI8JpNDiTagQi9L-DuEzhbg6mDbLgOr2sqhqSJuIaAl3PEALw_wcB