I've just purchased a 5/07 calais with a G8 front end with the v6, 190km on the car. I know these engines can be problematic at times but it comes with full history. Work that has been performed by Springwood Holden in the last 3 months includes a new ecu, full timing chain kit including cam phases and sensors, new water pump and thermostat and a full service. No start up rattles or the usual tick sound on idle like most alloytec motors do. Everything that usually fails on these things has been replaced so I'm thinking it's a good car but time will tell. Am I crazy getting this car? Share your thoughts please on anything else I should keep an eye out for as I know fa about anything vz upwards.