• Tool whistles as the piston approaches Top Dead Center (TDC) on the compression stroke and stops whistling when the piston reaches TDC.
• Helps to eliminate the guesswork involved when diagnosing jumped timing belts and timing chains.
• Aids in valve adjustments and installation of distributors, timing belts and timing chains.
• 2-in-1 fitting threads into all 14mm and 18mm spark plug ports.
• 27" overall length.
• Not for use on diesel engines.
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