Why can I not get my oil pump off? Motor is out of the car. Timing cover is on the work bench. I have removed the 4 bolts on the oil pump, but it will not come off. I have been hitting it with a rubber mallet for an hour and it will not budge. It does have a bronze spacer between the pump and timing cover, but what gives, this thing will not come off. I do not want to use a regular hammer and screw driver to separate the two for fear of breaking something. Am I missing something here. Help is appreciated!!!