Mercury E4FZ-6505-A Valve - Exhaust

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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.

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.

Owing to the sensitive operations of the job and the special tools and equipment involved, the work that involves resurfacing of the valves, valve seats, and the valve guides which is normally called the valve job should be conducted by an expert mechanic. It also enables a home mechanic perform a basic 'tear down' of the head, carry out initial preparation of cleaning and inspection before reassembling for transport to a dealer service department or an auto machine shop where the actual service is done. The inspection enables the understanding of the status of head and valve train parts; the work needed and new components when dealing with an automotive machine shop. Dealer service department or automotive machine shop can perform the following on valves: valve and springs are removed, valves and valve seats are recondition or replaced, valve guides are reconditioned, valve springs, spring retainers and keepers checked and replaced as required, new valve seals are installed, valve components are reassembled, installed spring height is checked and corrected if necessary. Also, depending on the condition, the surface of the cylinder head gasket will be restored if warped. After the valve job has been done by a professional, head will be as good as new. On its return it should be cleaned again before being bolted onto the engine to remove any loose metal particles and fine abrasive grit that may be left after the service of valves or a resurfacing of the head; and if possible, use compressed air to blow out all the oilways and passages.

A valve job refers to the servicing of the valves, valve seats, and valve guides in an engine.

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 or rotators, 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.