Ford 3S4Z-6507-AA Valve - Inlet

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Replace the camshafts.

11. Depress the cam follower again and press the correct shim into the recess in the cam follower with the thickness marking facing downwards. Ensure that the shim is properly located and apply a smear of clean oil to it. 12. After setting all clearances for the first cylinder's valves, rotate the crankshaft through two full turns clockwise to settle the shims. Return the cylinder to TDC on the compression stroke and recheck the valve clearances. Repeat the procedure from step 10 if any are still incorrect. 13. Repeat the process for the remaining cylinders, turning the crankshaft to bring each to TDC and then 90° after TDC. 14. Keep a record of the thickness of shim fitted at each position for future adjustments. Shims can be interchanged between cam followers to achieve correct clearances, but do not turn the camshaft with any shims removed to avoid jamming. 15. When all clearances are correct, remove the tool and install the valve cover.

1. Place the cylinder head upside-down on a bench, with a block of wood at each end to give clearance for the valve stems. 2. Smear a trace of valve-grinding compound on the seat face, and press a suction grinding tool onto the valve head. Grind the valve head to its seat with a semi-rotary action, lifting the valve occasionally to redistribute the grinding compound. 3. When a smooth unbroken ring of light grey matte finish is produced on both the valve and seat, the grinding operation is complete. Do not grind in the valves any further than absolutely necessary. 4. After grinding, carefully wash off all traces of grinding compound using a suitable solvent before reassembly of the cylinder head.