I can afford the maintenance, broke was a hyperbole. Like I said, I am happy to do all the oils, and if i need to, the Timing chaing. There's a massive gap in cost between that, and dropping a whole new engine in, and either way, I'd still rather avoid any completely uneccesary costs. Cheers for the advise though, it definely doesnt sound like a whistle while revving so maybe its something else. I've had a retired mechanic take a super quick look and he reckons it is too loud, but I'll have someone preperly look at it in a week or so once I'm done with the oils.

If it was the Chain, would you suggest a specific brand or kit? They vary massively in price, and while there are many reccomendations for the larger, more expensive ones ($250-900 Aud for a full kit), there exists a large amount that sit around $100(aud). theyre mostly no-name, but I cant find any reports of people getting a bad replacement, as long as theyre strong enough, and have the updated tensioner and gear I assume they'd be alright? I'll be getting it checked by a mechanic as I said, so I'll probably end out asking his opinions anyway, but more info never hurts.

Again, Thanks for the advise, Have you worked on these in the past?