2004 MG ZR • 4 cylinder 2WD Manual • 30,000 miles

Hi there, I have a mg zr 2 litre turbo diesel. The pump went about 3 months ago and a second hand one was fitted, the other week that went again, and a other secondhand pump was ftted can you tell me where I am going wrong I put the locking pin into the flywheel, locked of both pump before changing, and made sure belt was tight before timing and was running fine what could have caused this thanks
February 27, 2011.

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