blue looking smoke comes out of the pipes while sitting with motor running

Most common issue for this is The crankcase ventilation system should maintain a minimum amount of vacuum at the oil fill cap. If the vacuum level is greater than 3/4", the ventilation valves will need to be replaced. The valves are on the top of the valve covers and can be replaced individually. A failure of the valves will create too much vacuum in the crankcase which pulls oil into the intake manifold. To perform a compression test requires a factory scan tool that will set the valve lift to a defined position.