• 2 Pc. Air Hold Fitting Set
• Apply air pressure to keep valve closed while replacing valve spring
• Includes 14mm and 18mm adapters threaded for 1/4" NPT
• Remove spark plug and screw air hold into port
• Fasten air hose to fitting and apply pressure
• Works with valve spring compressor 2078D
• Caution: Vehicle must be placed in park/neutral before applying air pressure, otherwise vehicle may move
• Caution: Keep hands clear of fan, belts and pulleys since slight crankshaft rotation will occur
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