Technical Updates

ISX Intake Valve Chordal Failures - QSOL Reference: TSB150130. Under severe operating conditions, acidic corrosion and thermal stresses induced in the intake valve can initiate fatigue cracking which, over time, can propagate until a portion of the intake valve separates from the valve head and enters the cylinder. This type of valve failure is commonly known as a chordal failure. Once failed, performance of the engine is compromised and progressive damage to the piston, cylinder liner, cylinder head and turbocharger can occur. Typical complaints following intake valve chordal failures include but are not limited to check engine light, low engine power, cylinder misfire, “popping” noise from the air intake manifold, excessive engine noise, and engine shut down and no start conditions.

ISX12G CM2180 Air/Fuel Mixer Orientation - QSOL Reference: TSB150135. In some cases the air/fuel mixer has been found to be oriented with the “UP” stamping facing the wrong direction. This does not affect performance and causes no symptoms.

ISV5.0 CM3230 V104 Engine Introduction - QSOL Reference: TSB150098. This document announces the introduction of the 2015 ISV5.0 CM3230 V104 engine.

Improper Use of Heavy Duty Exhaust Gas Recirculation (EGR) Cooler Coolant Strip Test Procedure on Midrange Engines - QSOL Reference: TSB150132. There have been instances where heavy duty exhaust gas recirculation (EGR) cooler test strips were used to test midrange EGR coolers for internal coolant leak failures. Use of heavy duty engine coolant test strips to test midrange engine EGR coolers for internal coolant leak failures is not a published procedure, not a recommended practice, and will not provide accurate results.

New Service Tool for Diesel Exhaust Fluid (DEF) System Troubleshooting - QSOL Reference: TSB150116. A new diagnostic tool, Part Number 5299833, has been created to improve DEF system troubleshooting capability.

ISB6.7 CM2350 B101 and ISL9 CM2350 L101 New Short Turbocharger Service Kit Part Numbers - QSOL Reference: TSB150036. This document announces new short turbocharger service kit part numbers for specific turbocharger performance part options by application.

ISL9 CM2350 L101 High Pressure Injector Supply Line Vibration Damper Installation - QSOL Reference: TSB150146. Vibration damper, Part Number 4945989, has been installed on the number one and number six high pressure injector supply lines.