757-200
Member
Hi there, was advised via vectra c owners to join here relating to chain questions. Bought a 2.2 direct signum back in dec with 55000 and full vx service history. I still have to carry out a full sevice on the car however its not done thousnds since the previous owner had it done. When the car is started from cold there is a noise for about 2 seconds from the chain then goes away. When the car is started from warm there is some sort of chain noise from the engine and it feels as if the engine wants to make an arse of itself when starting but once started it sorts itself out and runs normal. Yesterday it got even better, went to collect mum, as I stuck shopping in the car a loud rattling chain noise from under the bonnet, almost as if the chain had lost its tension for about 5 - 10 seconds then went back to normal. Since my ownership the car has always had a lumpy idle on tickover, no fault codes present however and all coils appear smooth on live data. I am clearly looking into having the chain done but I would also want the balance chain done at the same time (I have read that this can contribute to lumpy idle aswell if loose). I have found a genuine chain kit and balance chain kit on ebay BUT it does not include sprockets or oil sump to cylinder head gasket and am unsure if it will have the better tensioner from the z20net. Are new sprockets a priority or is it maninly a chain, tensioner and guides ?