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← TechnologyWhat outcome occurs when excessive cylinder head exhaust valve guide wear occurs?
A)Increased oil consumption via blow-by✓
B)Decreased compression ratio uniformity
C)Elevated catalytic converter temperatures
D)Increased fuel injector duty cycle
💡 Explanation
Increased valve guide wear allows oil to enter the combustion chamber; this is **blow-by**. The **gas scavenging** process pulls oil past worn valve guides because the vacuum created by the piston sucks oil past the looser guides; therefore increased oil consumption results rather than other temperature effects.
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