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AERA Weekly Technical Bulletins – August 27, 2020



Camshaft Locations on 2010-2020 Ford 3.5L EcoBoost Engines


The AERA Technical Committee offers the following information for camshaft locations on 2010-2020 Ford 3.5L Ecoboost engines. This information should be considered anytime the cylinder heads are being removed from an engine.


This DOHC engine uses 4 unique camshafts and intermixing them may result in undesirable conditions. Marking each cam for location before removal will help immensely on re-assembly. Refer to the information below to help determine the proper locations if positive identification was not established before disassembly.




Cam Bearing Installation for 2015-2020 Cummins ISX11.9 Diesel Engines


The AERA Technical Committee offers the following information on cam bearing installation for 2015-2020 Cummins ISX11.9 diesel engines. This information should be considered anytime the cylinder block is being worked on.


This engine uses seven cam bearings to support the camshaft, the two outer camshaft bearings are numbered 1 and 7 and they’re wider than the inner bearings, Numbers 2 through 6. Currently, bearings are only available from Cummins with Part #4312002 for the two end bearings and Part #2869839 for the 5 intermediate bearings.




Mirror Bore Coating


Reducing drag inside the engine,

improving fuel consumption and power




Engine energy efficiency is a major influence on fuel consumption and engine performance. There are several factors that lower energy efficiency; one is mechanical loss. Energy efficiency drops due to the friction that arises from mechanical parts rubbing against each other. Mirror bore coating is a technology that raises energy efficiency by reducing the friction inside the engine.


Technology Functionality

Many engines today use lightweight aluminum materials for the cylinder block. In the cylinder block there is a cylindrical space inside which the piston moves up and down. However, since aluminum cannot endure the friction and heat that arises, designs also use a cast iron cylinder liner. Rather than inserting a cylinder liner, though, mirror bore coating technology sprays molten iron onto the surface of the cylinder bore and forms an iron coating layer on the walls inside. By giving this a mirror-like finish, the drag that arises when the piston is operating can be reduced.




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