Differential Cylinder Pressure Tester Model E2M

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Part# 12-01015
MFR Model# E2M


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 Tester, for cylinders of less than a 5.00 inch bore* with a .040 inch diameter orifice, that eliminates all guess-work by enabling you to determine the exact location and cause of your engine's efficiency loss. This tester is recommended by TCM per Service Bulletin SB03-3.

Model E2M includes:
  • Slow Fill Valve™
  • Safely find TDC
  • Safely bleed cylinder test pressure to
    zero for testing multiple cylinders
  • No repeated pressure adjustments
Master Orifice Valve™ Built in Master Orifice, for fast and easy Master Orifice Test

10/14 mm Adapter Available, sold separately.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Heavy Duty Regulator
  • Heavy Duty Gauges
  • All Connections Quick-Disconnect
  • 18 mm Plug Adapter
  • Extra Long High Pressure Hose
  • Complete instructions with each unit
  • Accessories
  • Frequently Purchased With
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Good product

Udomsak T Verified Purchase


November 25, 2022

Continental Service Bulletin SB03-03 was incorporated into Continental Maintenance Publication M-0, Standard Practice for Spark Ignited Engines, sections 6-4.11.2 and 6-4.11.3. Detailed instructions for using this E2M tester are in section 6- Incorporation of this Service Bulletin into the manufacturers current maintenance manual makes inspection with one of these tools a legal requirement for anyone conducting a 100-hr or annual inspection. (see the August 11, 2006, Mike Busch letter from the FAA Office of the Chief Counsel)

Pier28 I
November 24, 2022

perfect, and thanks for your customer desk help

Tutaj Verified Purchase


November 23, 2022

Good morning, I already received the product, is it possible for you to help me with the calibration certificate? has a calibration stamp of July 06, 2020 thanks

Jhon J
November 5, 2020

The pressure tester is a revolutionary new machine that has been specifically designed for the automotive engineering industry.

February 5, 2014

Instructions could be more detailed with respect to the use and meaning of master orifice test value reading. There is no mention as to what the value means. You need to read the TCM service bulletin to find this.

May 22, 2017


Please note,'s personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does the model E2M differential pressure tester come with a calibration certificate?

Per the supplier: The unit comes with a certificate of compliance. It has a sticker that states it its calibration certified.

Q: Does this Differential Cylinder Pressure Tester E2M unit include a storage case?

No, this does not come with a case.