Calais concerns

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I AM considering buying a Holden VL Calais (V6), preferably close to stock standard as possible, to then further modify it to my own specifications. I have heard that the head gaskets are a major problem for this model. Is this because the engine is made by Nissan? Can anything be done to prevent these problems?

THE VL was powered by a Nissan straight six, not a V6. There is a problem with the cooling system of the Commodore, but it's caused by the installation of the engine, not the engine itself. Because of installation compromises in the Commodore, the Nissan engine is difficult to refill with coolant after being drained. If it isn't correctly refilled, the system can be low on coolant and the engine will overheat. A bleed valve on the top of the engine needs to be opened so coolant can flow out when the system is full. If it's refilled correctly, you won't have any problems.

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