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knocking rear valve after putting head back on

RBVS

By RBVS,
in Engines & Forced Induction

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RBVS Community Regular

RBVS

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Posted

i have taken the head of my rb25, cleaned it , then put it back on. i understand that the head would have lost all the oil and lube when being left for so long. we ran the car for 20mins but the knock remained. i got some valve clean that is mixed to the oil to free stuck valves, ran another 20mins gave it a rev and the knock went but only at idle. as soon as you rev you can hear it. did a oil change and the knock has come back at idle and increases with revs. anyone had a simular problem when replacing head, what can you do to help free this knock?

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