Well Looks like I am going to pull the trigger and but a 95 530i today. I dont know if it is the Nik. block or not but I am going to assume it is, with 148,000 miles. I have read that you shouldnt assume anything on this engine but for now since it runs well I am going to assume that the motor is in the clear for now. I have two other questions that could change my mind, one is what is the average engine life for this motor, and second is how many people have actually had the Nik problem? If its something like half the people who have had the car have had the problem then i suppose it really isnt worth it.
Dan Lafley