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Q: Why would I have 3/16" axial end play in my crankshaft. on 2004 Volvo XC70

This problem was uncovered due to the rear crank seal leeking. Once the timing belt and timing belt drive were removed I found the seal had been driven out of its seat an 1/8". I could move the crank shaft axially about 3/16", nothing radially. I then pulled out the oil pump and could see that the crank shaft had been rubbing on the oil pump housing. I then removed the oil pan and can see the starter ring gear is rubbing on the front of the engine block. Is there some spacer bushing that was not installed, I can't see anything in parts book. Why would the crank shaft move this much axially?
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There should be a thrust bearing for the crank shaft. Did you see bearing material in the bottom of the oil pan?

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