Expiration Date Format Update
Kenworth technical service bulletin E335 for 2021-2022 Kenworth T680, 2021-2022 Peterbilt 579 and 2021-2022 Peterbilt 389 and others.
- Bulletin number
- E335 (E335)
- Component
- Engine
- Summary
- Expiration Date Format Update - Certain EPA21 compliant PACCAR MX-13 engines were built with intake valve springs that could fail. This failure can cause significant damage to the engine. New intake valve springs will be installed.
Owners of these vehicles have filed 1 complaints in the engine category.
Vehicles covered
- Kenworth T680 2021-2022 20212022
- Peterbilt 579 2021-2022 20212022
- Peterbilt 389 2021-2022 20212022
- Kenworth T880 2021-2022 20212022
- Peterbilt 567 2021-2022 20212022
- Kenworth W990 2021-2022 20212022
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