The hydraulic equipment is disconnected followed by removal of the tensioner. Pressure is released and the bolt remains with accurate load. The nut is wound down against the joint force. Hydraulic pressure is applied to the tensioner from a tensioning pump. The bolt tensioning tool is assembled onto the bolt to be tightened. Original state of bolt and nut before stretching.

Mechanical efforts to create torque are replaced with hydraulic ultra-high pressure.ĬEJN ultra high pressure couplings and nipples are standard products for these kinds of applications, our engineers have long experience and CEJN guarantee safe and high performing quality products. We will notify customers when replacement parts are ready.Bolt tensioning is a method of controlled tightening which applies load to a bolt by stretching it axially. Out of an abundance of caution, GM will replace lithium-ion battery modules in these Chevrolet Bolt EVs and EUVs with new lithium-ion modules. If this occurs, you should contact your Chevrolet Bolt EV/EUV certified dealer to have the affected high voltage battery module replaced.īased on manufacturing and diagnostic information, certain 2020-2022 Bolt EV/EUVs are not eligible for the Advanced Diagnostic Software. If the software detects a problem in your vehicle’s high voltage battery, you will be alerted via a warning in the driver information center. Once this software is installed on the vehicle, the recall will be resolved. After this occurs, the software’s advanced diagnostics will continue to monitor your vehicle’s high voltage battery system.

If no anomalies are detected after approximately 6,200 miles (10,000 km) of use, the high voltage battery will automatically return to a maximum state-of-charge of 100% without a return trip to the dealer. The Advanced Diagnostic Software will initially limit your vehicle’s high voltage battery to a maximum state-of-charge of 80%. Please schedule an appointment with your preferred Chevrolet dealership have this software installed. NEW: Select 2020 – 2022 model year Bolt EV and EUVs are eligible for a new Advanced Diagnostic Software that will continually monitor the high voltage battery in the vehicle.

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