Knocking from head very warn

[s2dk]

Hello
Was out driving my car today and did some wot and drove it hard
The came to a stop and the car ran in idle.
But it startet knocking from the head
It went away with some throttle
And came again in idle. It idle for lile 30 to 1 min and the the knocking went away?
Im running fresh 10/50 and hp os around 400 450 but dont know
Im think a hyd lifter? Or a friend of mine said that an s2 could havde problems with oil returning from the head?
Did some googling but did not find anything 😕
Any ideas
Btw rod bearings and crank bearings are newish 6000 km

[John.]

Maybe the oil splash guard on inside of cam cover at oil filler cap has come loose/broken??

[s2dk]

It did not seems like it when i pulled the oil cap off

[stocious]

Possibly hydraulic lifter, mine does exact same thing, but I'm sure of what it is is mine, pull the valve cover off and try to depress each lifter with something blunt, might want to do this when the car is making the noise, not when it's gone silent

[s2dk]

Yah
I thinkig that to
Thinking of getting new lifters for it
But im thining of rebuilding engine over winter
But dont know yet
They are fast to change
Maybe going new cat cams or schrick cams

[Rusty]

Check the oil level, if it's not at the top then this happens. I have a brand new engine, lifters etc. etc. and it's still happened if the oil level isn't towards the top

[s2dk]

Its maybe a mm from the top of the dottet area on the stick isent tgat were max is? At the top dottet area

[Dynasty]

Check the oil level, if it's not at the top then this happens. I have a brand new engine, lifters etc. etc. and it's still happened if the oil level isn't towards the top

Why? Something wrong with your oil pickup tube?

[s2dk]

Think mine got a bad lifter
Was on track here in the weekend and it did it again
Maybe its the 10/50 oil?