The Differential Cylinder Pressure Testers quickly locate worn and cracked rings, defective intake and exhaust valves, scored and cracked cylinders, leaky head gaskets, and worn and stripped spark plug bushings; virtually every potential cause of pressure loss. Model E2M-1000 Tester, for cylinders with a 5.00 inch bore and over a .060 inch diameter orifice, that eliminates all guess-work by enabling you to determine the exact location and cause of your engine's efficiency loss. Model E2M-1000 includes:
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Mine completely came apart. Springs and washers went everywhere. It’s at least a few years old but I’ve alway kept it in a padded case purchased separately. I’ve tried to call the company a few times for repair advice but couldn’t anyone to answer my calls.
The calibration information is on a sticker on the unit. It has a one year calibration time once manufactured at the factory. Shipping and time on the shelf will shorten the one year date once it is received by the end user.