Hey everyone!
Street_Rod wrote: |
| ... why this suddenly happened during the head gasket replacement remains a mystery. |
No mystery here; it's a clear case of dirt getting into the fuel lines during the installation or removal of the cylinder head.
As far as that ironic quote is concerned, there's nothing to

, because a sudden failure of the PDE internals and/or sporadic hardening of certain seals in this context lacks any logic

.
Nevertheless, and most importantly, thank you very much for your feedback!
Allow me to close this thread as successful.
Have a good trip always!
Best regards from Munich!
EDIT: Okay, then I'll leave it open for now *to-BM-look*

1. S.verlängerung: Audi A4 Avant quattro, 1,9 TDi MKB: AFN, BJ98, Vollausstattung, +VP1L
2. Moped BMW K1200RS, 130 PS, BJ98, Vollausst.
3. T5 1,9 TDI PD (AXC), BJ04 - nur Ărger!