Service bulletin SB1634

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

Product Improvement. Introduction of new single check valves in cooling-circuits deaeration lines.Van Hool have recently switched over into production a new type of single check valve. Contrary to the previous type equipped with a plastic housing, the new type comprises an aluminium housing. Because of this, they are better suited to resist higher coolant temperatures. As the new type can also be used on previoulsy sold vehicles, only the new type will be available as a spare part. This service bulletin applies to All Van Hool Vehicles.

The document

• NHTSA's copy of the document (PDF)
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The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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