Discovery II (LT) V8-4.6L (2003)
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Valve: Application and ID
Exhaust Valve Identification
Description
Two types of exhaust valves may be installed: Standard valves (A in illustration) or carbon break valves (B in illustration).
Identifying
Carbon break valves may be identified by the machined profile C on the valve stem.
Replacing
To prevent exhaust valves from sticking, standard exhaust valves should be replaced with carbon break valves during engine overhaul.
