Mercury XL3Z-6507-AA Valve - Inlet

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Due to the intricate nature of the task and the high cost of the necessary special tools and equipment, servicing of the valves, valve seats, and valve guides, often referred to as a valve job, is typically more conveniently and affordably carried out by an automotive machine shop. A home mechanic can remove and disassemble the head, perform the initial cleaning and inspection, then reassemble and deliver it 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 to understand what work and new parts are needed when interacting with an automotive machine shop. The dealer service department or automotive machine shop will then 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 or rotators and keepers (if necessary), replace the valve seals with new ones, reassemble the valve components and ensure the installed spring height, and pressure, is correct. The cylinder head gasket surface will also be resurfaced if it's warped, if not beyond service limits. It may be wise to have the cylinder head pressure checked for internal coolant leaks, particularly if the engine has overheated. After the valve job, the head will be in a condition similar to new. When the head is returned, it should be cleaned again before installation on the engine to remove any remaining metal particles and abrasive grit from the valve service or head resurfacing operations. Compressed air can be used to blow out all the oil holes and passages.

Because of the nature of the position and the specific instruments and equipment needed, performing the valve job as it takes to service the valves, valve seats, and valve guides should be handled by an expert. An amateur can unbolt the head, open it to inspection and semi-cleaning before delivering the assembly to a dealership or an automotive machine where the actual work will be done. It makes it possible to determine the state of components of heads and valve trains, know what work is still required, what new parts may be needed when cooperating with an automotive machine shop. The dealer service department or automotive machine shop is retained for the relief of valves and springs, valve face necessary reconditioning or new, reconditioning of valve guides, checking and replacing of valve springs, spring retainers, rotators and keepers if necessary, valve seal replacement, assembly of valve components, and correct installed spring height check also. Also, if its surface has warping, the cylinder head gasket surface will be resurfaced. After the valve job is done by a professional the head will be almost as new as it was when it first came out the factory. On its arrival, the head must also be washed to reduce the amount of metal particles and abrasive grit that might still be present after serving the valves or resurfacing, and compressed air if available should be used to blow out all the oil holes and passages before fitting on the engine.

The home mechanic can remove and disassemble the head, perform the initial cleaning and inspection, and then reassemble it to deliver 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 understand what work and new parts are required.

Doing the inspection will enable you to see what condition the head and valve train components are in and will ensure that you know what work and new parts are required when dealing with an automotive machine shop.

They 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, rotators, 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.

If a clearance is out of specification, the tappet must be replaced with a new tappet that has a different thickness head to correct the clearance.