Just thought i'd share this with you. As some of you may have read on a previous post my chain was rattling on and off on my Signum 2.2, but was intermittent and would do it hot or cold, only every now and again. Anyway, it jumped a tooth as i started it up last week and that was that- or so i thought.
Initially the first garage said that the engine is more than likely sh4gged, they said they could fit a new engine for £4K + vat!! - Not likely, or re-time for £1K+vat
Anyway, took it to a garage a friend knows, nothing fancy just a good honest mechanic who seems to love his cars.
Within the hour he told me that the valves weren't damaged, as he leak tested and had the feeler gauges out to check clearences etc.
He did find the cause of the problem as to why the chain had become slack and jumped. He found a bolt floating about when he took the cam chain cover off. It had sheared out of the head and was one of the bolts that holds a plastic chain guide in place. Its the one that doesn't move (usually) so god knows how it snapped! Anyway 3 hours of persisting he managed to drill out the snapped bolt without taking the head off and then helicolied it. Its weird how the bolts snapped as its not under any pressure and you cant overtighten it as has a shoulder on it so you dont crush the plastic guide.
New Chain and tensioner replaced, engine flushed, oil and filter, £500!!! Well happy
So not sure whether this is a problem anyone else has had, but just to be aware everyone, if like me you hear a rattle, get it checked out!