07 valvetrain knock
bought an 07 1/2 ton crew cab new body style yesterday. throwing a PO304 Cylinder 4 misfire. horrific knocking noise is coming from the head/valvecover area. the guy i bought it from said the chevy dealer told him it was a lifter bad. any guesses/suggestions. i have searched all over this site and others and not finding much. i will be tearing into it this weekend and just thought i would see if anyone can guess what it is before i open it up. the truck is 4x4 with 125K. still holds 45psi oil pressure at stop sign and does not have any vibration or balance issues
1979 K30 straight wheel 4X4. 04 6.0 LQ4, 4L80e, NP205, 60 front, 14 bolt Disc Brake rear