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Message: [QUOTE="Wildman, post: 1148704, member: 18533"] If there are no leaks in the high pressure oil system (as you have verified), the problem is the replacement high pressure oil pump (HPOP) or the base oil system not allowing oil to reach the HPOP. To test the base oil system, remove the oil filter while holding down the anti-drainback valve in the oil filter housing using a screwdriver. While cranking the engine, the oil filter housing should fill with oil within a few seconds. If it doesn't, this indicates that the base oil pump or oil pickup is at fault. If the filter housing fills properly, check the oil reservoir nylon screen and the passage between the reservoir and the pump. If either is restricted, it will not allow oil to reach the HPOP. If you don't find any restrictions, suspect a faulty replacement HPOP. [/QUOTE]

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