rocker shafts are burnt up

Other than no oil getting to them , what else could cause this,

New build and broke engine in. Oil presure good before we broke cam in. Cam and lifters are alright but one shafts is cooked and the other is starting too. Two lifters and one shafts are finished. Any ideas before I phone machine shop. Motor is a 440, 30thousand bore, oil pressure is 70-80lbs.



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