Allen B

Hi there, I'm having the same problem. 2011 Chevy Silverado, 5.3 150k. Dod delete (Comp)cam stage 2 .597 Ls7 Lifters AMF oil galley plugs Non-AMF Valley plate Upgraded Rocker Arm Bearings High Volume 18% Oil Pump Camshaft Gear and GM Cam Bolt Timing chain and Camshaft Plate GM Oil Pressure Switch Ac Delco Oil Filter Mail Order Email Tune GREAT TUNER The engine runs smooth with a little chop. But I have a ton and valve train noise on both banks. My rod and main bearings look great. I bore scoped the camshaft bearings; they looked good. My oil pressure at the filter is 45 psi cold and the same at the oil pressure switch, the oil pressure drops to 20 psi at idle warm. The valve train noise get worse has the Engine gets warm and with RPM. No misfires. I talked to my tuner thinking it maybe the VVT solenoid dumping oil pressure due to tune. Nope! The only thing I can come up with is the camshaft bearings must have enough clearance that I'm dumping oil pressure at the cam besrimgs and my lifters are starving for oil. I'm going to pull the valve covers back off and hang the coils up and run the engine to see if I have oil coming through the push rods. If there is no oil making it up to the rocker arms it has to be the camshaft bearings. Does this make sense??