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You'd be surprised what gets sucked back through. I've seen an engine that had a valve head drop, and pits of shrapnell made it into different cylinders
like water when it's cold. it's the same difference with an F7R/P between 5w40 and 10w40, they just consume the thinner oil at an alarming rate, when in theory there's only a small difference
It's actually not that unusual an issue on any switched VVT engine. the 4AGE 20v, the SR20, the K4M all have well known issues with exactly the same thing
I dont really understand that either, but thorough cleaning out seems to do a lot to stop it. The only one I've had to do was 18 months after a cambelt change
edit...LOL there he is now. Your cars a shed ;)
it's down to people being tight about servicing IMO. stretching oil change intervals well beyond factory recommendations. Moneys got tight in the last couple of years, servicing is the first thing that suffers
I would expect the aux belt was changed, but not the tensioner kit. Not many places wouldn't change the aux belt at least, that would be extremely bad practice
Hi Nick.
There's nothing that can actually fail, so driving will be ok until you have it fixed, but as the pulley deteriorates you'll find a lot more flat spots in normal driving.
May well be worth doing an oil change, but often the damage is done.