Technical Service Bulletin 42-062 — 2023 KENWORTH W990
ENGINE AND ENGINE COOLING
Bulletin Details
| TSB ID | 42-062 |
| Manufacturer | |
| Vehicle | 2023 KENWORTH W990 |
| Component | ENGINE AND ENGINE COOLING |
| Communication Date |
Bulletin 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.
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.