Ford F77Z-6505-AA Valve - Exhaust

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The dealer service department or automotive machine shop will remove the valves and springs, recondition or replace the valves and valve seats, recondition the valve guides, check and replace the valve springs, spring retainers, and keepers as necessary, replace the valve seals with new ones, reassemble the valve components, and ensure the installed spring height is correct. Additionally, they will resurface the cylinder head gasket surface if it is warped.

Measure the clearance between the base of the cam lobe and the tappet (bucket-style) using a feeler gauge. Record the thickness of the blade required to give a firm sliding fit on all four valves of the Number 1 cylinder.

Because of the complex nature of the job and the special tools and equipment needed, servicing of the valves, the valve seats, and the valve guides, commonly known as a valve job, should be done by a professional.

Use liberal amounts of oil on the cam lobes and journals before installing the camshafts. Carefully measure the valve clearances again before installing the valve cover to ensure they are correct. Follow all lightening sequences and torque specifications. Ensure all electrical and hose connections are correct to avoid issues like the Check Engine warning light illuminating or poor engine performance. After installation is complete, run the engine and check for any leaks.