Almost certain to have damaged the valves. Unless your engine is very high mileage or was poorly cared for servicing-wise, I would expect most garages to take the cylinder head off to see if you can get away with new valves (plus new chain kit of course) or failing that just a new cylinder head before suggesting a whole new engine. Of course, if the engine is worn out then a whole new engine may be the cheapest option, but any secondhand engine is always a gamble. A genuine Vauxhall replacement engine would be more than the car is worth I would guess.

Edited by Victorbox on 29/03/2011 at 17:55