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2007 Silverado 5.3 V8 with AFM with 180,000 miles


Truck had lifter ticking sound and white smoke upon every start up which would go away after a few minutes, no check engine light


Replacement list :

- headgasket

- valve gaskets

- upgraded drivers side valve cover

- valve stem seals

- intake manifold gasket

- exhaust manifold gasket

- 8 new afm lifters

- 8 new non-afm lifters

- head gasket bolts

- engine coolant temperature sensor

- spark plugs

- spark plug wires

- fuel injectors

- water pump

- thermostat

- cam sensor

- crank sensor


After completion of engine reassembly no longer had white smoke upon start up and no ticking sound but flashing check engine light code p0300.

Code p0300 was for cylinder #1, #4, & #7


Moved coil packs between cylinder #1 and #2 to see if coil packs was bad but no change. Set engine at TDC before installing the rocker arms. 


All bolts have been properly torque and no parts have been left unplugged or uninstall.


Any possible advice would be helpful 

Edited by Dgs000
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