If there are complaints for these models about "engine overheating" or "excessive engine temperature", check the functionality of the coolant pump (water pump), as well as the engine's thermal management peripheral components (thermostat, temperature sensor, etc.).
The problem may be caused by a broken paddle wheel in the coolant pump.
To test the functionality of the coolant pump, remove the cap from the coolant expansion tank. Start the engine and then keep the engine speed at approx. 2000 rpm.
Additionally, remove the coolant return line from the coolant expansion tank (see figure below). If the coolant is not flowing, replace the coolant pump.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
The reprinting, distribution, reproduction, exploitation in any form and disclosure of the contents of this document, even in part, is prohibited without our express written approval and indication of the source. The schematic illustrations, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.
Not helpful at all
Very helpful