hi sages- this question has come up before. is the common red block 2.3 volvo 240 4cyl. engine interference or has it ever been? my understanding has always been that it is not. if the timing belt busts this engine will not self destruct by crashing the valves into the pistons. a colleague insists that this is exactly what will happen, causing joy at the dealer who after his eyes light up like a freshly polished cash register, can now soak the hell out of you to replace/rebuild the head and commit various other larcenies. have read here many messages about replacing busted timing belts . if the head or block top is planed down and modified this might turn it into an interference engine but if left stock no interference. car is a 92 240 wagon. confusion in some may be caused by the reality that today virutally all late model cars 4 and 6 cyl. have this interference characteristic, allegedly to raise mpg and cut emissions, but at least partly to enhance dealer profitability on repairs that shouldnt happen. so has anybody here been clipped to repair this boondoggle on the 2.3 red block? maybe ive been to the cleaners too often and have a bad attitude. thanks tons oldduke