Certain W900 Mahle radiator assemblies were built with closed upper vent ports
Kenworth technical service bulletin 42-062 for 2023 Kenworth W990.
- Bulletin number
- 42-062
- Component
- Engine and engine cooling
- Summary
- Certain W900 Mahle radiator assemblies were built with closed upper vent ports. This closed port can result in slow deaeration of coolant leading to trapped air in the cooling system. Trapped air can cause higher than normal engine operating temperatures. This has the potential to cause a warning light on the dash.
Vehicles covered
- Kenworth W990 2023 2023
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