Water Hammer Arrestors: Types & Comparison

Yes, the title is intentional!

One of my hydropumps rattles briefly after starting – for a few seconds, and the noise is significantly less pronounced.

Something else is still rattling, but much quieter.

There are no injector noises because the injectors are new, and it also rattles when you release the accelerator (i.e., when the amount of electricity is zero).

Are there different types of Hydros, such as one that always empties quickly but also refills quickly (the loud, short clatter), and another that never fills completely (the quieter, persistent clatter)?
We would then have the sound profile as described above.

I'm concerned about having to redo 8 hydro treatments unnecessarily, only to end up having to extract the tooth anyway, or even have it re-treated like what happened to Boro.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

It's possible that a hydraulic cylinder might not fully extend even with sufficient oil pressure if it's mechanically damaged. If the noise is coming from the valve drive, that would suggest the problem lies there.
My car now rattles for almost 10 seconds after a cold start: But I'm leaving the hydraulics in because I don't want to completely disassemble it.

Remove the valve cover after the engine has been running for a while and then check the valve clearance. If a feeler gauge between 25 and 30 thousandths of an inch fits underneath, the lifter is worn out.

Hi.

I've already tried running it and then measuring it with my JP before.
"At lower temperatures, some stoppers were too soft compared to their condition at warmer temperatures."

But the "15ers" were always there.

I guess I'll probably do it anyway.

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.