For engines with cylinder bore 5" and over, with 18mm Plug Adapter Eastern Technology E2A and E2A-1000 Differential Pressure Testers Eastern Technology's E2 Series Differential Pressure Testers quickly locate worn and cracked rings, defective intake and exhaust valves, scored and cracked cylinders, leaky headgaskets and worn and stripped spark plug bushings, virtually every potential cause of pressure loss. Eliminates all guesswork by enabling you to find the exact location and cause of your engine's efficiency loss.

• Slow Fill Valve™ allows you to:
1. Safely find TDC
2. Safely bleed cylinder test pressure to zero for testing multiple cylinders
3. No repeated pressure adjustments.
• Heavy Duty Regulator
• Heavy Duty Gauges
• All Connections Quick-Disconnect
• Extra Long Pressure Hose
• All Models Come With 18mm Plug Adapter
• E2A for engines with Cylinder Bore less than 5"
• E2A-1000 for engines with Cylinder Bore 5" and over