probably hairline crack in one or more of piston liners,
same problem with mine.
cure,:- engine rebuild or replacement engine.
sorry for bad news. pete.
pete., August 2009
mine did the same - you need to remove the clocks and replace the bulb which will be blown. ( it's the most used one, so is the first to go). There was a spare in the cluster for a warning light not utilised on my model.
sludger, March 2009
in need of some help
over heating had new head gask fitted still overheating change the thermomsat still over heating waterpump ok still over heating flush cooling system but still over heating