Timing is out but deviation is steady: set timing or major overhaul

[IanHall]

Quick question (I hope!).

Vehicle: 2000 Boxster S, standard transmission, 140k kms. IMS bearing has NOT been changed and the clutch is original with plenty of clutch remaining.

Just checked the camshaft position deviation via shiny new Durametric and found the timing on both banks is a fair amount out of spec (-7 and -10 respectively - see screen cap).

The deviations stay rock steady at all RPMs and there aren't any other symptoms of loose timing chains / failing IMS bearing (rattling at startup, chain slap, bit of plastic or metal in the oil, etc.), at least none that I can detect. Engine runs smoothly and there are no error codes.

Question:
Does this call for a major overhaul now (cam chain tensioners, guides, etc.) or, since there are no other indicators, should I first just try resetting the timing without pulling everything apart?

(If this is just a normal timing thing, would prefer to put off major overhaul until the clutch goes at which point I'll do the IMSB, clutch, and timing overhaul all at once.)


Appreciate any insights you can share!