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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