Features:

• Use to apply air pressure to keep valve closed while replacing valve spring.
• Set includes 14 and 18mm adapters threaded for 1/4in. NPT.
• To use, remove spark plug and screw air hold into port. Fasten air hose to fitting and apply pressure. Use with 912, 2078, 3087 or 3271 Valve Spring Compressors.

Caution: Vehicle must be placed in park/neutral before applying air pressure, otherwise vehicle may move. Keep hands clear of fan, belts and pulleys since slight crankshaft rotation will occur.