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well trying to do a water pump on my d16z6 broke the bolt in the cam gear trying to turn it, so we took the cam out of my spare z6 and put it in, when putting the metal piece back on (the one that has the oil squirters in it, with all the 12mm bolts) it cracked... twice, on the intake manifold side closest to the cam gear. what are we doing wrong? it doesnt even get all the way tight before it breaks!