If the cylinder heads are on the engine, you will need to add air pressure to the cylinder to hold the valves in place. Our example is the Craftsman 47089 compression test kit using the 14mm long ...

Fittings such as these, for connecting a compressed air line to the spark plug hole for valve support, are available at most auto parts stores. Occasionally it is necessary or desirable to inspect or ...

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Geraldine has over a decade of experience writing within the home improvement sector. Additionally, she has unique first-hand renovation experience as the previous owner of a house-flipping business.