A faulty or sluggishly operating coolant thermostat can result in an excessively high coolant temperature or a poorly running engine on the above mentioned vehicles.
If the coolant thermostat opens sluggishly, inadequate coolant circulation will affect the engine cooling system and can result in the above mentioned symptoms. To rectify the problem, it is necessary not only to fit the modified thermostat, but also to replace the thermostat housing with the modified thermostat housing.
Service part no (ET no.)
1 piece: ET no.: 17670-77E10 thermostat
1 piece: ET no.: 17690-77E01 thermostat housing
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