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 note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or 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, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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