Ford E5ZZ-6505-A Exhaust Valve

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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.

The head should be cleaned again 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.

A home mechanic can remove and disassemble the head, perform initial cleaning and inspection, and then reassemble it before delivering it to a dealer service department or automotive machine shop for the actual service work.