Just after any advice or info regarding the the tappy top end noise from the LH bank of my TDV8. Its very pronounced, I think its maybe number 8 cylinder or maybe the one in front of it.
It not noticeable at tickover but becomes much louder as soon as the engine revs.
The OBD is not throwing any codes.

Ive tried some Liqui Moli Hydraulic Lifter Additive but it makes no odd.

Any advice on strip down and troubleshooting most welcome.

Thanks in advance