Hi guys,
Had a bit of a search around, but many threads seem to point to a possible ticky fuel pressure regulator (I think) rather than a mechanical ticking from the tappets, which I seem to have.
I took the Z to Nissan for a service (just to keep the book stamped up) and after a couple of weeks, I had the oil changed again to Motul 5W30 fully synth, as I didn't believe Nissan would have put anything "good" in there. So fast forward a month, and now she rattles well for less than a second or so when starting in the morning, then I can hear a fairly good tappet rattle.
Would an engine oil additive be any help? (Molyslip / Wynns / Slick 50 etc.) I have used them in different engines that were less complex than this one, and has helped with the noise. I know they are looked upon as a bit "snake oil", but has definitely helped in the past.
Should I change the oil to something a bit thicker? Note that even when the engine is fully warmed up, she still ticks a long merrily.
Z is a 53 plate UK spec with 60k on the clock, and a full Nissan SH.
All help / guidance / abuse greatly received!