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Old July 10th, 2013, 08:26 AM   #398
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Join Date: 05-23-10
Location: chesaning mi usa
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My 5.3 lost oil pressure and started knocking shortly after I put it in.
Ended up being the pump. theres a spring loaded valve in them and the spring broke. Not saying that's your problem but it was mine. If theres no metal in the oil its hard to believe a cam bearing spun. Those make a lot of bling
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