Mercury F87Z-6505-BA Valve - Exhaust

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A home mechanic can remove and disassemble the heads, perform the initial cleaning and inspection, and then reassemble the heads to deliver them to a dealer service department or an automotive machine shop for the actual service work. This inspection allows the mechanic to assess the condition of the head and valve train components and determine what work and new parts are required.

You will need to purchase these special parts from your local dealership.

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 assure that they are correct. Follow all tightening sequences and the torque specifications. Make certain all electrical and hose connections are correct to avoid the CHECK ENGINE warning light, poor engine performance, or engine damage. After installation is complete, run the engine and check for any leaks.

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 Ensure the installed spring height is correct Resurface the cylinder head gasket surface if it's warped.

Always wear eye protection when using compressed air.

After the valve job has been performed by a professional, the head will be in like-new condition. When the head is returned, be sure to clean it again before installation on the engine to remove any metal particles and abrasive grit that may still be present from the valve service or head resurfacing operations. Use compressed air, if available, to blow out all the oil holes and passages.