Have you checked the water pressure in system? I once had the same problem and it turned out that the system needed topping up....probably not the answer but worth mentioning anyway :wink:
I have a problem with the rev counter on my astra. The darned thing is stuck on 2000 revs and doesn't move even when the engine's off. Had a look in the haynes but can't find any reference to the Astra even having a rev counter.
Anyone have any ideas as to the cause/remedy of this problem. All...