Use to locate TDC, whistles on the compression stroke. Our TDC indicator threads into 14mm or 18mm threaded spark plug holes. Note: Not for use on diesel engines.

Use to locate TDC, whistles on the compression stroke. Next time you are needing to locate Top Dead Center on your hot rod’s engine, let Mr. Gasket lend a hand. Our TDC indicator threads into 14mm or 18mm threaded spark plug holes. It whistles on the compression stroke and stops whistling at approximately Top Dead Center. Just a few of the many examples of when needed are, timing chain inspection or replacement, distributor installation and cylinder leak down.. Note: Not for use on diesel engines.

Mr. Gasket Top Dead Center Indicator 8016MRG. Use to locate TDC, whistles on the compression stroke. Our TDC indicator threads into 14mm or 18mm threaded spark plug holes. Note: Not for use on diesel engines.