Vl keeping its cool

YOUR Commodore has a six-cylinder engine bought from Nissan, basically the same that was fitted to the Nissan Skyline here. The engine is a fine unit, but there was an installation problem when it was fitted to the Commodore, and it can give trouble when air pockets develop in the cooling system, causing the engine to overheat. It's important to use the correct coolant if you have to top up the cooling system -- don't use water, and be careful to bleed the cooling system properly if you have to service it for any reason. The auto is generally reliable, but it is expensive if you have to rebuild it. One thing to check is the service history. Older drivers often consider servicing too expensive, especially if they do few kays. Find out if the car has been well serviced, and if it hasn't think about getting it serviced.