AFN engine failure

Hello,
Now, it's happened to us too, our AFN is no longer working.

The following happens:
At approximately 50 km/h, the engine suddenly cut out without any warning. It was no longer possible to start the engine with the sound of a ticking noise in the background.
ADAC's initial assumption was ZR, but he checked immediately and found nothing; it's stuck and looks great. So, the car was towed.

I first removed the valve cover, and sure enough, three hydraulic lifters had dissolved and their contents were distributed. Okay, keep your head down...
The engine wouldn't turn over to top dead center; something was jammed. It would crank over with the starter, but wouldn't rotate freely when forced.
The timing belt was properly installed and tensioned, the crankshaft pulley bolt is tight, and the water pump pulley bolt is also tight.
After removing the cylinder head, it was evident that all the valves had contacted the pistons, and the camshaft sprocket appeared to have spun forcefully on the camshaft (possibly due to the camshaft being blocked by a faulty hydraulic lifter?). I can't imagine it any other way.

But what do I do now?
Would it be too bold to simply create a completely new product from scratch?
Should all the pistons be replaced, including the connecting rods and bearings?

Here are a few more pictures to illustrate .

Sure, no problem!
Phil.

The pistons in the picture look okay. Are the remaining ones also free of cracks, and do they all have the same piston protrusion? If so, replacing the cylinder head with a new one, including new valves and camshafts, should get it running again.

Even after a crack in the cylinder head, some pistons can still function relatively well.
Often, a completely new replacement engine exceeds the market value of the car.

Quote:

Even after a crack in the cylinder head, some pistons can still function relatively well.

I see it that way too.

I'm a little concerned about the pistons and their potential for age-related degradation (crack formation).

Only God knows how long they will last before a crack appears.

Around 250,000 km, you might want to start thinking about it.

Hello,
Thank you for your answers .
The engine has 295,000 kilometers on it. What are shrinkage cracks?

The pistons all look "good" otherwise... no cracks are visible.
I will measure the piston protrusion again tomorrow.

Thank you.
Phil.

That's always the way.

They break without warning. Most often occurs on the highway after a period of heavy use.

Check under "Piston Crack" in the search.

and here: /viewtopic.php?t=14778&highlight=schwundrisse

The outcome also depends heavily on the driving profile. Vehicles that are permanently...

It starts to struggle with the performance limits around 200,000 km. Other vehicles experience this later. Prediction impossible.

I think a good used cylinder head would be the maximum amount I would personally be willing to invest in that old engine.

Hello,
For those who are interested.
I installed a different used engine with 110,000 km, along with the turbo and ESP.

It's been running perfectly since the beginning of the year!
Passed the HU and AU tests without any defects on the first attempt .

Thank you for your help!!