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What you are experiencing is a common problem with the later 6.0l engines,there is a quick connect fitting from the high pressure oil pump the oil rail feed tubes,this connector fails and will blow apart and cause a no start condition. They will sometimes start after cool down whe the oil gets thick enough to build pressure and overcome the leak. Ford has a repair kit to correct this problem. If your unit has under 100,000 mi
it should still be covered under warranty.
NOTE: Use care when removing the pump cover. The 3 bolts remaining in the pump cover under the EGR cooler can fall out of the pump cover and into the engine under the high-pressure pump.
CAUTION: To prevent engine damage, do not pry off the high-pressure pump cover off the pump or damage to the cover can occur.
CAUTION: To prevent engine damage, use only an approved pump cover seal. Substitution could cause damage to the pump cover.
CAUTION: To prevent engine damage, the high-pressure oil pump cover must be firmly seated on the O-ring seal to prevent cracking the cover plate.
NOTE: Use care when installing the high-pressure pump cover with fasteners. The 3 bolts in the cover could fall out of the cover and fall down in the engine under the high-pressure pump.
NOTE: Apply clean engine oil to the high-pressure oil pump O-ring seal prior to installing the high-pressure pump cover.