Thread: 402 oil pressure drop/noise

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We just installed a fairly recent rebuilt 402 that i bought from a friend. Its a 1970 high performance 2 bolt with oval heads and a solid luniti cam. At first the motor ran perfect for a few weeks but now when engine runs at 190 degrees the oil pressure drops to almost zero at idle and there is a engine knock. Im wondering if it could be a crank bearing? Thanks for any help.

Quick way to find out would be to pull the pan & see what's under the caps.

Thank you for the reply. Will do next week.