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Got my 04 f150 5.4l 3v back from dealer yesterday. replaced cam phasers both banks. that diesel sound is GONE!! dealer told me the new cam phasers.will not change the performance. so far he's right!! have extended premium package. with $50 deductable.they had my truck for 2 days.also the kluk sound gone!!when shifting from dead stop. dealer greased the drive shaft yoke. dealer told me any future problems please call.. is this a dream????
If i under stand it right its just the noise! i was told the cam phasers dose not hinder performance, but if you still have warranty go for it, iam glad I did, good luck.