Valve Job

What things should be included in a complete valve job
Everything needed to restore a cylinder head to like-new condition, including basics such as:

Cleaning cylinder head and valve train components

Inspecting head for cracks, leaks, warpage, or other damage

Inspecting valves, seats, springs, guides, and other valve train components for wear and damage (and replacing parts that cannot be reused)

Grinding or cutting valves and seats

Restoring valve guides by knurling, relining or replacing, or reaming guides and using valves with oversized stems

Checking installed valve stem height, spring height and tension, etc., and reassembling the head with new valve guide seals and any other required parts

Resurfacing head to assure flatness and a proper seal

The following “extras” might be required, especially on overhead cam aluminum heads:

Repairing leaks or cracks

Straightening

Overhead cam line boring

Repairing threads

Replacing seats

There is no such thing as a “standard” valve job. Every job is different. An overhead cam aluminum head may require a lot more time and effort than a cast iron head off a pushrod engine. There is often no way to tell what a head will need in terms of repairs until it has been cleaned, disassembled and inspected. Exhaust valves and springs often need to be replaced. Valve guides and/or seats may have to be replaced. The head may be warped or cracked, requiring additional repairs. The list of things included in a “complete” valve job will vary from job to job.

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